Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677117
Riaz Mondal, T. Ristaniemi, Munzura Doula
Digital pre-distortion (DPD) is an efficient way of linearizing RF power amplifiers in wireless communications transmitters. Memory Polynomial and Generalized Memory Polynomial methods are two such successful methods capable of reducing spectral regrowth of high power amplifiers with memory effect. However, these methods often need a large number of coefficients, which makes these methods less cost efficient. In this paper we present an effective method based on Genetic Algorithm to simultaneously reduce the number of coefficient and optimize the performance of Memory Polynomial (MP) and Generalized Memory Polynomial (GMP) Radio Frequency (RF) power amplifier pre-distorters. The proposed method is validated using a single carrier WCDMA signal using an indirect learning architecture. In comparison with the MP model, the proposed model shows improved adjacent channel power ratio performance in the DPD application with 42% reduction in the number of coefficients. In comparison with the GMP model, the proposed model achieves higher model accuracy and better DPD performance, but reduces 25% of coefficients.
{"title":"Genetic Algorithm Optimized Memory Polynomial digital pre-distorter for RF power amplifiers","authors":"Riaz Mondal, T. Ristaniemi, Munzura Doula","doi":"10.1109/WCSP.2013.6677117","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677117","url":null,"abstract":"Digital pre-distortion (DPD) is an efficient way of linearizing RF power amplifiers in wireless communications transmitters. Memory Polynomial and Generalized Memory Polynomial methods are two such successful methods capable of reducing spectral regrowth of high power amplifiers with memory effect. However, these methods often need a large number of coefficients, which makes these methods less cost efficient. In this paper we present an effective method based on Genetic Algorithm to simultaneously reduce the number of coefficient and optimize the performance of Memory Polynomial (MP) and Generalized Memory Polynomial (GMP) Radio Frequency (RF) power amplifier pre-distorters. The proposed method is validated using a single carrier WCDMA signal using an indirect learning architecture. In comparison with the MP model, the proposed model shows improved adjacent channel power ratio performance in the DPD application with 42% reduction in the number of coefficients. In comparison with the GMP model, the proposed model achieves higher model accuracy and better DPD performance, but reduces 25% of coefficients.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125297810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677195
Lei Wang, B. Zheng, Jingwu Cui, Haifeng Hu
Eigenvalue-based spectrum sensing algorithms, such as the maximum-minimum eigenvalue (MME) algorithm and the Marčhenko-Pastur (MP) law based algorithm, are based on the asymptotic behavior of large random matrices and have very high sensing performance with an appropriate threshold. The advantage of such algorithms is that they can work very well without the estimation of noise variance, and this feature is very attractive for practical applications because of the hardness of obtaining an exact noise variance. In practical applications, threshold-setting is the key problem of such algorithms and it is important to find a simple and efficient way to make it work well with any specific dimensions (i.e. the sizes of samples and transceivers). In this paper, a Monte-Carlo threshold is provided, which shows how eigenvalue-based spectrum sensing algorithm can work well with the new threshold for any specific dimensions. Performance analysis over the E-UTRA channel model in 3GPP LTE demonstrate that, compared with the original MME detection and the MP-law-based detection, as well as the classical energy detection, the improved scheme with Monte-Carlo threshold offers superior detection performance.
{"title":"Performance analysis of eigenvalue-based sensing algorithm with Monte-Carlo threshold","authors":"Lei Wang, B. Zheng, Jingwu Cui, Haifeng Hu","doi":"10.1109/WCSP.2013.6677195","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677195","url":null,"abstract":"Eigenvalue-based spectrum sensing algorithms, such as the maximum-minimum eigenvalue (MME) algorithm and the Marčhenko-Pastur (MP) law based algorithm, are based on the asymptotic behavior of large random matrices and have very high sensing performance with an appropriate threshold. The advantage of such algorithms is that they can work very well without the estimation of noise variance, and this feature is very attractive for practical applications because of the hardness of obtaining an exact noise variance. In practical applications, threshold-setting is the key problem of such algorithms and it is important to find a simple and efficient way to make it work well with any specific dimensions (i.e. the sizes of samples and transceivers). In this paper, a Monte-Carlo threshold is provided, which shows how eigenvalue-based spectrum sensing algorithm can work well with the new threshold for any specific dimensions. Performance analysis over the E-UTRA channel model in 3GPP LTE demonstrate that, compared with the original MME detection and the MP-law-based detection, as well as the classical energy detection, the improved scheme with Monte-Carlo threshold offers superior detection performance.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128186581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677156
J. Dai, Jingwei Liang, Ming Chen, Yang Li, Jun Zhou, Yang Zhou
The paper studies regional planning issues of Coordinated Multi-Point (CoMP) Transmission with perfect feedback under single-user scenario. Given the downlink received signal expression and the definition of penalty factor, the net ergodic capacity optimization problem is derived. For this optimization problem, the capacity of non-CoMP and CoMP is analyzed and the optimization goal is simplified. Then the relation between net ergodic capacity and cooperative BSs' number is analyzed. Simulation results show that the theoretical analysis curves are consistent with the results obtained by Monte Carlo simulation.
{"title":"Research on the cooperative BSs' number of coordinated Multi-Point Transmission with perfect feedback","authors":"J. Dai, Jingwei Liang, Ming Chen, Yang Li, Jun Zhou, Yang Zhou","doi":"10.1109/WCSP.2013.6677156","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677156","url":null,"abstract":"The paper studies regional planning issues of Coordinated Multi-Point (CoMP) Transmission with perfect feedback under single-user scenario. Given the downlink received signal expression and the definition of penalty factor, the net ergodic capacity optimization problem is derived. For this optimization problem, the capacity of non-CoMP and CoMP is analyzed and the optimization goal is simplified. Then the relation between net ergodic capacity and cooperative BSs' number is analyzed. Simulation results show that the theoretical analysis curves are consistent with the results obtained by Monte Carlo simulation.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125757830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677199
Junshi Liu, Yun Pan, Wenkai Ding, R. Huan
With the growing need of the high quality image captured by the camera in smartphones and other portable equipment, it is necessary to implement the demosaicking algorithm hardcore into the embedded system to balance the tradeoff between the power and performance. However, current demosaicking algorithms either produce poor image quality due to their focus on low cost hardware, or are too complex to be implemented into the embedded system. In this paper, we propose a cost effective demosaicking algorithm based on edge-orientation map and realize the algorithm in hardware. The proposed algorithm can reduce great hardware cost by adjusting the interpolation flow and simplifying the topology of edge-orientation map. The algorithm has been verified to be high performance by subjective measurement and color peak signal to noise ratio (CPSNR) and has been implemented in Altera FPGA with greatly reduced resources and a real time speed of 200MHz.
{"title":"Cost effective hardware based demosaicking algorithm for embedded system","authors":"Junshi Liu, Yun Pan, Wenkai Ding, R. Huan","doi":"10.1109/WCSP.2013.6677199","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677199","url":null,"abstract":"With the growing need of the high quality image captured by the camera in smartphones and other portable equipment, it is necessary to implement the demosaicking algorithm hardcore into the embedded system to balance the tradeoff between the power and performance. However, current demosaicking algorithms either produce poor image quality due to their focus on low cost hardware, or are too complex to be implemented into the embedded system. In this paper, we propose a cost effective demosaicking algorithm based on edge-orientation map and realize the algorithm in hardware. The proposed algorithm can reduce great hardware cost by adjusting the interpolation flow and simplifying the topology of edge-orientation map. The algorithm has been verified to be high performance by subjective measurement and color peak signal to noise ratio (CPSNR) and has been implemented in Altera FPGA with greatly reduced resources and a real time speed of 200MHz.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125158040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677215
Guan Gui, Shinya Kumagai, A. Mehbodniya, F. Adachi
Broadband wireless communication often requires accurate channel state information (CSI) at the receiver side due to the fact that broadband channel is described well by sparse channel model. To exploit the channel sparsity, invariable step-size zero-attracting normalized least mean square (ISS-ZA-NLMS) algorithm was applied in adaptive sparse channel estimation (ASCE). However, ISS-ZA-NLMS cannot trade off the algorithm convergence rate, estimation performance and computational cost. In this paper, we propose a variable step-size ZA-NLMS (VSS-ZA-NLMS) algorithm to improve the adaptive sparse channel estimation in terms of bit error rate (BER) and mean square error (MSE) metrics. First, we derive the proposed algorithm and explain the difference between VSS-ZA-NLMS and ISS-ZA-NLMS algorithms. Later, to verify the effectiveness of the proposed algorithm, several selected computer simulation results are shown.
宽带无线通信通常需要接收端准确的信道状态信息(CSI)，因为稀疏信道模型可以很好地描述宽带信道。为了充分利用信道的稀疏性，将不变步长吸零归一化最小均方(ss - za - nlms)算法应用于自适应稀疏信道估计。然而，ISS-ZA-NLMS不能在算法的收敛速度、估计性能和计算成本之间进行权衡。本文提出了一种可变步长ZA-NLMS (VSS-ZA-NLMS)算法，从误码率(BER)和均方误差(MSE)指标方面改进自适应稀疏信道估计。首先，我们推导了所提出的算法，并解释了VSS-ZA-NLMS算法与ISS-ZA-NLMS算法的区别。随后，为了验证所提算法的有效性，给出了几个选定的计算机仿真结果。
{"title":"Variable is good: Adaptive sparse channel estimation using VSS-ZA-NLMS algorithm","authors":"Guan Gui, Shinya Kumagai, A. Mehbodniya, F. Adachi","doi":"10.1109/WCSP.2013.6677215","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677215","url":null,"abstract":"Broadband wireless communication often requires accurate channel state information (CSI) at the receiver side due to the fact that broadband channel is described well by sparse channel model. To exploit the channel sparsity, invariable step-size zero-attracting normalized least mean square (ISS-ZA-NLMS) algorithm was applied in adaptive sparse channel estimation (ASCE). However, ISS-ZA-NLMS cannot trade off the algorithm convergence rate, estimation performance and computational cost. In this paper, we propose a variable step-size ZA-NLMS (VSS-ZA-NLMS) algorithm to improve the adaptive sparse channel estimation in terms of bit error rate (BER) and mean square error (MSE) metrics. First, we derive the proposed algorithm and explain the difference between VSS-ZA-NLMS and ISS-ZA-NLMS algorithms. Later, to verify the effectiveness of the proposed algorithm, several selected computer simulation results are shown.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122695171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677242
Yiyang Ni, Shi Jin, Ran Tian, Kai‐Kit Wong, Hongbo Zhu, S. Shao
In this paper, we investigate the outage probability of device-to-device (D2D) communication assisted by decode-and-forward (DF) relay node and that using traditional strategy. We assume all terminals are equipped with single-antenna. We first derive closed-form expressions for the outage probability of the D2D link under asymmetrical and symmetrical cases respectively. Then we derive tight approximations of the outage behavior in the high signal-to-noise (SNR) regime under the two cases. Based on these results, we then show that the D2D communication aided by DF relay node gains advantages over that of the traditional strategy without extra power. Numerical results demonstrate that the analytical results are accurate on various conditions.
{"title":"Outage analysis for device-to-device communication assisted by two-way decode-and-forward relaying","authors":"Yiyang Ni, Shi Jin, Ran Tian, Kai‐Kit Wong, Hongbo Zhu, S. Shao","doi":"10.1109/WCSP.2013.6677242","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677242","url":null,"abstract":"In this paper, we investigate the outage probability of device-to-device (D2D) communication assisted by decode-and-forward (DF) relay node and that using traditional strategy. We assume all terminals are equipped with single-antenna. We first derive closed-form expressions for the outage probability of the D2D link under asymmetrical and symmetrical cases respectively. Then we derive tight approximations of the outage behavior in the high signal-to-noise (SNR) regime under the two cases. Based on these results, we then show that the D2D communication aided by DF relay node gains advantages over that of the traditional strategy without extra power. Numerical results demonstrate that the analytical results are accurate on various conditions.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124998037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677106
Junfei Yang, Jingyu Hua, Weidang Lu, L. Meng, Bin Jiang
This paper presents the application of autoregressive (AR) methods in 3-D fading channel modeling and generation. It employs the AR method to yield the filter coefficient in the 3D and non-isotropic scattering environment, and derives the channel statistics from the geometry-based stochastic channel model (GSCM). Simulations show that the statistical variable of simulated channel agrees with the referenced model. Moreover, by exploiting the Agilent advanced design systems (ADS) software and the Agilent E4432B vector signal generator, the above AR model can be realized in ADS, and then the physical fading channel can be generated through the E4432B instrument. The tests of frequency analyzer demonstrate that the proposed scheme can generate the physical fading channel precisely by the design requirement.
{"title":"Generation of 3-D physical fading channel with non-isotropic scattering","authors":"Junfei Yang, Jingyu Hua, Weidang Lu, L. Meng, Bin Jiang","doi":"10.1109/WCSP.2013.6677106","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677106","url":null,"abstract":"This paper presents the application of autoregressive (AR) methods in 3-D fading channel modeling and generation. It employs the AR method to yield the filter coefficient in the 3D and non-isotropic scattering environment, and derives the channel statistics from the geometry-based stochastic channel model (GSCM). Simulations show that the statistical variable of simulated channel agrees with the referenced model. Moreover, by exploiting the Agilent advanced design systems (ADS) software and the Agilent E4432B vector signal generator, the above AR model can be realized in ADS, and then the physical fading channel can be generated through the E4432B instrument. The tests of frequency analyzer demonstrate that the proposed scheme can generate the physical fading channel precisely by the design requirement.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125097975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677087
Lipeng Fan, L. Ding, Fang Liu, Yongjin Wang
This report develops a prototype to demonstrate a directional wireless visible light communication (VLC) system based on Android Mobile. In this system, Two android mobiles can transmit local data to each other simultaneously. The system consists of two parts, the hardware and the software. The design of hardware is based on the USB port integrated in the Android Mobile. The development of software utilizes the protocol of AOA (Android Open Accessory) which is a new feature in Android 3.1 or more advanced version whereby a USB host device can connect to the Android device, allowing data transmission between Android devices over USB interfaces. Thus, the driver of the hardware needn't be added into the kernel of android. Combing with a USB port on one board, it can achieve up to 2Mbps bit rates error free, which is mainly limited to the USB bridge circuit between two mobiles for data transmission such as text, audio and video. The software is used to set the transmission data rate, control bits, check bits so as to achieve real-time and directional transmission between two mobile devices with a USB port. This paper also shows the experimental results of the Q-factor of the eye diagram and bit rate during system transmission. The range and the angle of communication are also discussed in the paper.
本报告开发了一个基于Android Mobile的定向无线可见光通信(VLC)系统的原型。在本系统中，两台安卓手机可以同时传输本地数据。该系统由硬件和软件两部分组成。硬件设计是基于Android手机内置的USB接口。软件的开发利用了AOA (Android Open Accessory)协议，这是Android 3.1或更高版本的新功能，USB主机设备可以连接到Android设备，允许Android设备之间通过USB接口进行数据传输。因此，不需要将硬件的驱动程序添加到android的内核中。结合一块板上的USB端口，可以实现高达2Mbps的码率无错误率，主要局限于两部手机之间的USB桥接电路，用于文本、音频、视频等数据传输。该软件用于设置传输数据速率、控制位、校验位，从而实现两个带有USB端口的移动设备之间的实时、定向传输。文中还给出了眼图的q因子和系统传输时的比特率的实验结果。本文还对通信范围和通信角度进行了讨论。
{"title":"Design of wireless optical access system using LED based android mobile","authors":"Lipeng Fan, L. Ding, Fang Liu, Yongjin Wang","doi":"10.1109/WCSP.2013.6677087","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677087","url":null,"abstract":"This report develops a prototype to demonstrate a directional wireless visible light communication (VLC) system based on Android Mobile. In this system, Two android mobiles can transmit local data to each other simultaneously. The system consists of two parts, the hardware and the software. The design of hardware is based on the USB port integrated in the Android Mobile. The development of software utilizes the protocol of AOA (Android Open Accessory) which is a new feature in Android 3.1 or more advanced version whereby a USB host device can connect to the Android device, allowing data transmission between Android devices over USB interfaces. Thus, the driver of the hardware needn't be added into the kernel of android. Combing with a USB port on one board, it can achieve up to 2Mbps bit rates error free, which is mainly limited to the USB bridge circuit between two mobiles for data transmission such as text, audio and video. The software is used to set the transmission data rate, control bits, check bits so as to achieve real-time and directional transmission between two mobile devices with a USB port. This paper also shows the experimental results of the Q-factor of the eye diagram and bit rate during system transmission. The range and the angle of communication are also discussed in the paper.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"43 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131722608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677239
Kang Song, Baofeng Ji, Yongming Huang, Luxi Yang
This paper investigates the performance of the multiple relay selection scheme where more than one relay participates in the relaying. We consider a network consisting of one source node, one destination node and several relay nodes, which are used to aid communication between source and destination. With the help of order statistics, the performance of the system is analyzed. By deriving probability density function (PDF) and cumulative density function (CDF) of the receive signal, the outage probability, bit error ratio (BER) and capacity of the system are obtained. With these results, a quality-of-service (QoS) based multiple relay selection scheme is proposed such that the number of selected relays is simply determined by the QoS constraint and transmit signal-to-noise ratio (SNR). All analytical results are validated via Monte Carlo simulation.
{"title":"Performance of multiple relay selection with QoS requirement for cooperative relay networks","authors":"Kang Song, Baofeng Ji, Yongming Huang, Luxi Yang","doi":"10.1109/WCSP.2013.6677239","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677239","url":null,"abstract":"This paper investigates the performance of the multiple relay selection scheme where more than one relay participates in the relaying. We consider a network consisting of one source node, one destination node and several relay nodes, which are used to aid communication between source and destination. With the help of order statistics, the performance of the system is analyzed. By deriving probability density function (PDF) and cumulative density function (CDF) of the receive signal, the outage probability, bit error ratio (BER) and capacity of the system are obtained. With these results, a quality-of-service (QoS) based multiple relay selection scheme is proposed such that the number of selected relays is simply determined by the QoS constraint and transmit signal-to-noise ratio (SNR). All analytical results are validated via Monte Carlo simulation.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128255405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-02DOI: 10.1109/WCSP.2013.6677189
Tan-Jan Ho
In this paper, we first present a novel switched model sets-based interacting multiple-model (SMS-IMM) algorithm for urban mobile location estimation. Two state-space model sets are considered. The model set 1 only covers the dynamics of a mobile station without taking the non-line-of-sight (NLOS) bias variation into account. The model set 2 consists of the modeling of the MS dynamics and the NLOS bias variation expressed as a random walk process. The IMM using the model set 1 can perform better than the IMM using the model set 2 when the line-of-sight (LOS) condition takes place. This phenomenon can be reversed when the NLOS condition occurs. The proposed SMS-IMM algorithm takes the advantage of the switching between the two model sets so that the sight conditions and the MS locations can be estimated more accurately. Next, we extend the SMS-IMM to a SMS-fuzzy-tuned-IMM for further performance improvement. Simulation results demonstrate the superior performance of the proposed algorithms.
{"title":"Switched model sets-based estimators for mobile localization in rough NLOS conditions","authors":"Tan-Jan Ho","doi":"10.1109/WCSP.2013.6677189","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677189","url":null,"abstract":"In this paper, we first present a novel switched model sets-based interacting multiple-model (SMS-IMM) algorithm for urban mobile location estimation. Two state-space model sets are considered. The model set 1 only covers the dynamics of a mobile station without taking the non-line-of-sight (NLOS) bias variation into account. The model set 2 consists of the modeling of the MS dynamics and the NLOS bias variation expressed as a random walk process. The IMM using the model set 1 can perform better than the IMM using the model set 2 when the line-of-sight (LOS) condition takes place. This phenomenon can be reversed when the NLOS condition occurs. The proposed SMS-IMM algorithm takes the advantage of the switching between the two model sets so that the sight conditions and the MS locations can be estimated more accurately. Next, we extend the SMS-IMM to a SMS-fuzzy-tuned-IMM for further performance improvement. Simulation results demonstrate the superior performance of the proposed algorithms.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130583694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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