We consider the problem of hierarchical spectrum sharing in cognitive radio environment. In the system model under consideration, licensed service (i.e., primary service) can share/sell available spectrum to an unlicensed service (i.e., secondary service), and again, this unlicensed service can share/sell allocated spectrum to other service (i.e., tertiary service). We formulate the problem of hierarchical spectrum sharing as an interrelated market model in which a multiple-level market is established among the primary, secondary, and tertiary services. We use the concept of demand and supply functions in economics to obtain the partial equilibrium for which all services are satisfied with the shared spectrum size and the charging price. These functions are derived based on the utility of the connections using the different services. In addition, we consider a system for which the global information is not available. Therefore, each service needs to learn and adapt the strategies to reach an equilibrium. Two iterative algorithms (i.e., excess demand-based and successive overrelaxation (SOR)) are proposed. The stability condition for the learning rate is analyzed for these algorithms.
{"title":"Hierarchical Spectrum Sharing in Cognitive Radio: A Microeconomic Approach","authors":"D. Niyato, E. Hossain","doi":"10.1109/WCNC.2007.699","DOIUrl":"https://doi.org/10.1109/WCNC.2007.699","url":null,"abstract":"We consider the problem of hierarchical spectrum sharing in cognitive radio environment. In the system model under consideration, licensed service (i.e., primary service) can share/sell available spectrum to an unlicensed service (i.e., secondary service), and again, this unlicensed service can share/sell allocated spectrum to other service (i.e., tertiary service). We formulate the problem of hierarchical spectrum sharing as an interrelated market model in which a multiple-level market is established among the primary, secondary, and tertiary services. We use the concept of demand and supply functions in economics to obtain the partial equilibrium for which all services are satisfied with the shared spectrum size and the charging price. These functions are derived based on the utility of the connections using the different services. In addition, we consider a system for which the global information is not available. Therefore, each service needs to learn and adapt the strategies to reach an equilibrium. Two iterative algorithms (i.e., excess demand-based and successive overrelaxation (SOR)) are proposed. The stability condition for the learning rate is analyzed for these algorithms.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"81 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124780393","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}
The latest mobile WiMAX standard promises to deliver high data rates over extensive areas and to large user densities. More specifically, data rates are expected to exceed those of conventional cellular technologies. The IEEE 802.16e WiMAX standard enables the deployment of metropolitan area networks to mobile terminals in non-line-of-sight radio environments. Current concerns include leveraging high data rates, increasing area coverage, and competing with beyond 3G networks. Based on the IEEE 802.16e wirelessMAN-OFDMA (orthogonal frequency division multiple access) physical (PHY) layer air-interface, this paper presents a physical layer study of MIMO enabled mobile WiMAX in an urban environment. The radio channels are based on those developed in the European Union IST-WINNER project. Results are given in terms of system throughput and outage probability with and without relays for a range of SISO, MISO and MIMO architectures. Results show that satisfactory performance cannot be achieved in macrocells unless radio relays are used in combination with MIMO-STBC.
{"title":"Performance Evaluation of Mobile WiMAX with MIMO and Relay Extensions","authors":"Y. Bian, A. Nix, Yong Sun, P. Strauch","doi":"10.1109/WCNC.2007.341","DOIUrl":"https://doi.org/10.1109/WCNC.2007.341","url":null,"abstract":"The latest mobile WiMAX standard promises to deliver high data rates over extensive areas and to large user densities. More specifically, data rates are expected to exceed those of conventional cellular technologies. The IEEE 802.16e WiMAX standard enables the deployment of metropolitan area networks to mobile terminals in non-line-of-sight radio environments. Current concerns include leveraging high data rates, increasing area coverage, and competing with beyond 3G networks. Based on the IEEE 802.16e wirelessMAN-OFDMA (orthogonal frequency division multiple access) physical (PHY) layer air-interface, this paper presents a physical layer study of MIMO enabled mobile WiMAX in an urban environment. The radio channels are based on those developed in the European Union IST-WINNER project. Results are given in terms of system throughput and outage probability with and without relays for a range of SISO, MISO and MIMO architectures. Results show that satisfactory performance cannot be achieved in macrocells unless radio relays are used in combination with MIMO-STBC.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126669132","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}
In this paper we propose a two-stage carrier frequency offset (CFO) estimator for frequency synchronization in the uplink of MC-CDMA system. The proposed approach is non-data-aided and uses only the second order statistics (SOS) of the received signal. In the first stage, determinant of a matrix which is a function of the CFO is used as a cost function. A linear search is performed and the search point which minimizes the determinant value is taken as the estimated CFO. This is called coarse synchronization. In the second stage, adaptive LMS algorithm is used to estimate the CFO. The LMS algorithm is initialized with the estimated CFO from the first stage. The application of the gradient type algorithm is due to the local convexity of the cost function. The performance of the proposed estimator is evaluated through computer simulations.
{"title":"Two-Stage Frequency Synchronization for Uplink MC-CDMA System","authors":"L. B. Thiagarajan, S. Attallah, Ying-Chang Liang","doi":"10.1109/WCNC.2007.455","DOIUrl":"https://doi.org/10.1109/WCNC.2007.455","url":null,"abstract":"In this paper we propose a two-stage carrier frequency offset (CFO) estimator for frequency synchronization in the uplink of MC-CDMA system. The proposed approach is non-data-aided and uses only the second order statistics (SOS) of the received signal. In the first stage, determinant of a matrix which is a function of the CFO is used as a cost function. A linear search is performed and the search point which minimizes the determinant value is taken as the estimated CFO. This is called coarse synchronization. In the second stage, adaptive LMS algorithm is used to estimate the CFO. The LMS algorithm is initialized with the estimated CFO from the first stage. The application of the gradient type algorithm is due to the local convexity of the cost function. The performance of the proposed estimator is evaluated through computer simulations.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130666049","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}
In the past years we have been focusing on developing DPC-OF/TDMA (dynamic parameter controlled orthogonal frequency and time division multiple access) system (Harada et al., 2003) which targets at beyond 100 Mbps data rate. In this paper, we extend DPC-OF/TDMA to support higher data rates with the same bandwidth of its original version. The evolved DPC-OF/TDMA is based on our newly proposed multi-layer STBC OFDM (multi-layer space-time block coded orthogonal frequency division multiplexing) scheme. This scheme combines the spatial diversity and spatial multiplexing in order to exploit the benefits of both techniques. To evaluate the performance of the evolved DPC-OF/TDMA, we conduct simulations under different MIMO antenna configurations. As the packet error rate (PER) is required to be 1.0e-2 with Eb/No lower than 20.0dB, the evolved DPC-OF/TDMA can reach data rate of 921.6Mbps while the bandwidth is 128MHz. The achieved average spectral efficiency is 7.2bit/s/Hz.
在过去的几年里，我们一直专注于开发DPC-OF/TDMA(动态参数控制的正交频率和时分多址)系统(Harada et al.， 2003)，目标是超过100 Mbps的数据速率。在本文中，我们扩展了DPC-OF/TDMA，以支持更高的数据速率，而其原始版本的带宽相同。改进的DPC-OF/TDMA是基于我们新提出的多层STBC OFDM(多层空时分组编码正交频分复用)方案。该方案结合了空间分集和空间复用，以利用这两种技术的优点。为了评估改进后的DPC-OF/TDMA的性能，我们在不同的MIMO天线配置下进行了仿真。由于要求PER (packet error rate)为1.0e-2，且Eb/不低于20.0dB，因此演进后的DPC-OF/TDMA在带宽为128MHz的情况下可以达到921.6Mbps的数据速率。实现的平均频谱效率为7.2bit/s/Hz。
{"title":"High-Data-Rate DPC-OF/TDMA Based on Multi-Layer STBC Coded MIMO-OFDM","authors":"M. Lei, R. Funada, H. Harada, S. Kato","doi":"10.1109/WCNC.2007.178","DOIUrl":"https://doi.org/10.1109/WCNC.2007.178","url":null,"abstract":"In the past years we have been focusing on developing DPC-OF/TDMA (dynamic parameter controlled orthogonal frequency and time division multiple access) system (Harada et al., 2003) which targets at beyond 100 Mbps data rate. In this paper, we extend DPC-OF/TDMA to support higher data rates with the same bandwidth of its original version. The evolved DPC-OF/TDMA is based on our newly proposed multi-layer STBC OFDM (multi-layer space-time block coded orthogonal frequency division multiplexing) scheme. This scheme combines the spatial diversity and spatial multiplexing in order to exploit the benefits of both techniques. To evaluate the performance of the evolved DPC-OF/TDMA, we conduct simulations under different MIMO antenna configurations. As the packet error rate (PER) is required to be 1.0e-2 with Eb/No lower than 20.0dB, the evolved DPC-OF/TDMA can reach data rate of 921.6Mbps while the bandwidth is 128MHz. The achieved average spectral efficiency is 7.2bit/s/Hz.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123921413","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}
Lili Liu, Jianchi Zhu, Xiaofeng Tao, Yao Wang, Ping Zhang
For the Evolved UTRA (EUTRA), in OFDMA uplink, the Inter-cell interference cannot be predicted precisely, so scheduling becomes a puzzling problem and directly affects the uplink performance in OFDMA based system. Previous works (Galdata, et. al., 2003) did not concern such a problem or just consider single cell environment. In this paper, a novel scheme is proposed that could efficiently solve this problem in multi-cell circumstance. It predefines UEs distributed in the whole cell adopt fixed modulation and coding scheme (MCS) according to the distance from Node B. It employs initial average predictive interference to create the first-loop Inter-cell interference and perform scheduling according to the historical information in the following. Fast power control is adopted in order to compensate the imprecisely predictive inter-cell interference. Soft frequency reuse scheme is adopt in order to improve the cell-edge UE performance. To guarantee the UE fairness, proportional fairness (PF) scheduling is adopted in single input and single output (SISO) environment in this paper.
对于演进式UTRA (EUTRA)，在OFDMA上行链路中，由于无法准确预测小区间干扰，因此调度成为困扰OFDMA系统的一个难题，并直接影响到OFDMA系统的上行链路性能。以前的工作(Galdata等人，2003)没有考虑这样的问题，或者只考虑单细胞环境。本文提出了一种新的方案，可以有效地解决多单元环境下的这一问题。它根据到节点b的距离，预先定义分布在整个小区内的ue，采用固定调制编码方案(fixed modulation and coding scheme, MCS)，采用初始平均预测干扰产生第一环小区间干扰，并根据后续的历史信息进行调度。采用快速功率控制来补偿不精确预测的小区间干扰。采用了软频率复用方案，提高了蜂窝边缘的UE性能。为了保证UE的公平性，本文在单输入单输出(SISO)环境下采用比例公平性(PF)调度。
{"title":"A Novel Scheme for OFDMA Based E-UTRA Uplink","authors":"Lili Liu, Jianchi Zhu, Xiaofeng Tao, Yao Wang, Ping Zhang","doi":"10.1109/WCNC.2007.259","DOIUrl":"https://doi.org/10.1109/WCNC.2007.259","url":null,"abstract":"For the Evolved UTRA (EUTRA), in OFDMA uplink, the Inter-cell interference cannot be predicted precisely, so scheduling becomes a puzzling problem and directly affects the uplink performance in OFDMA based system. Previous works (Galdata, et. al., 2003) did not concern such a problem or just consider single cell environment. In this paper, a novel scheme is proposed that could efficiently solve this problem in multi-cell circumstance. It predefines UEs distributed in the whole cell adopt fixed modulation and coding scheme (MCS) according to the distance from Node B. It employs initial average predictive interference to create the first-loop Inter-cell interference and perform scheduling according to the historical information in the following. Fast power control is adopted in order to compensate the imprecisely predictive inter-cell interference. Soft frequency reuse scheme is adopt in order to improve the cell-edge UE performance. To guarantee the UE fairness, proportional fairness (PF) scheduling is adopted in single input and single output (SISO) environment in this paper.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123957538","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}
J. Yun, Byungjun Bae, Woo-Hyeon Kim, Chunghyun Ahn, S. Lee
In this paper, the transmission architecture of terrestrial digital multimedia broadcasting (T-DMB) system is studied to develop an 'ensemble' analysis method for video services. And a novel ensemble analysis system which consists of a hardware module for signal processing and a software module for analysis processing is designed and implemented.
{"title":"Analysis of T-DMB Ensemble Transport Signal for Mobile Video Services","authors":"J. Yun, Byungjun Bae, Woo-Hyeon Kim, Chunghyun Ahn, S. Lee","doi":"10.1109/WCNC.2007.507","DOIUrl":"https://doi.org/10.1109/WCNC.2007.507","url":null,"abstract":"In this paper, the transmission architecture of terrestrial digital multimedia broadcasting (T-DMB) system is studied to develop an 'ensemble' analysis method for video services. And a novel ensemble analysis system which consists of a hardware module for signal processing and a software module for analysis processing is designed and implemented.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123405120","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}
Yuan Liu, Chenling Huang, Hao Min, Guohong Li, Yifeng Han
A high performance digital demodulator for RFID reader receiver is proposed. After carefully analyzing the characteristics of the received data, correlation operation is introduced into the demodulator to estimate the frequency of the received data and decode them. Simulation result indicates that this demodulator can work well under the 6dB input signal-to-noise ratio (SNR) with +/- 22% frequency deviation tolerance. FPGA implementation result shows that the communication distance between reader and tag can be extended to 5m above by the use of this demodulator.
{"title":"Digital Correlation Demodulator Design for RFID Reader Receiver","authors":"Yuan Liu, Chenling Huang, Hao Min, Guohong Li, Yifeng Han","doi":"10.1109/WCNC.2007.313","DOIUrl":"https://doi.org/10.1109/WCNC.2007.313","url":null,"abstract":"A high performance digital demodulator for RFID reader receiver is proposed. After carefully analyzing the characteristics of the received data, correlation operation is introduced into the demodulator to estimate the frequency of the received data and decode them. Simulation result indicates that this demodulator can work well under the 6dB input signal-to-noise ratio (SNR) with +/- 22% frequency deviation tolerance. FPGA implementation result shows that the communication distance between reader and tag can be extended to 5m above by the use of this demodulator.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123519857","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}
As the demand for broadband wireless access services grows rapidly, much attention has been paid to integrated communication and broadcast networks (ICBN). ICBN can provide high-rate, on-demand, reliable data and multimedia services while in fast moving. In this paper, we introduce an ICBN system in which DMB-T broadcast network works as the forward link and wireless access networks are used for the return channel respectively. We first differentiate four types of services, including digital TV, video on demand, data download and Internet access. Then the system features are given. Next, we design the system architecture and the three subsystems, including the DMB-T broadcast network, the return channel and the terminal. With the introduction of subnetwork data unit (SNDU), the protocol to transmit data on DMB-T broadcast network is presented. We also stack the functions of the system into different layers in terms of four types of services, and introduce each of them, including signaling messages exchange and ARQ scheme, etc. Then the testbed is briefly introduced. Finally we draw the conclusion.
{"title":"A Hybrid DMB-T and WLAN Network for Broadband Wireless Access Services","authors":"Long Long, Z. Niu, Binjie Zhu","doi":"10.1109/WCNC.2007.783","DOIUrl":"https://doi.org/10.1109/WCNC.2007.783","url":null,"abstract":"As the demand for broadband wireless access services grows rapidly, much attention has been paid to integrated communication and broadcast networks (ICBN). ICBN can provide high-rate, on-demand, reliable data and multimedia services while in fast moving. In this paper, we introduce an ICBN system in which DMB-T broadcast network works as the forward link and wireless access networks are used for the return channel respectively. We first differentiate four types of services, including digital TV, video on demand, data download and Internet access. Then the system features are given. Next, we design the system architecture and the three subsystems, including the DMB-T broadcast network, the return channel and the terminal. With the introduction of subnetwork data unit (SNDU), the protocol to transmit data on DMB-T broadcast network is presented. We also stack the functions of the system into different layers in terms of four types of services, and introduce each of them, including signaling messages exchange and ARQ scheme, etc. Then the testbed is briefly introduced. Finally we draw the conclusion.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116264919","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}
T. Melia, Daniel Corujo, A. D. Oliva, A. Vidal, R. Aguiar, I. Soto
The availability of multiple technologies, with micro and macro wireless cells, for network access combined with terminals capable of exploiting such diversity in wireless access requires the development of new mechanisms for optimized handover procedures. Appealing solutions should support network controlled handovers through heterogeneous technologies, preferably combined with a cross-layers two/three design. The IEEE 802.21 working group is currently standardizing the methods and the protocol potentially able to provide such a solution. In this paper we analyze the impact of signaling timing on network controlled handovers execution and performance in this environment. Through an extensive simulation study, we obtain results, that can be exploited in both terminal and handover procedure designs.
{"title":"Impact of Heterogeneous Network Controlled Handovers on Multi-Mode Mobile Device Design","authors":"T. Melia, Daniel Corujo, A. D. Oliva, A. Vidal, R. Aguiar, I. Soto","doi":"10.1109/WCNC.2007.710","DOIUrl":"https://doi.org/10.1109/WCNC.2007.710","url":null,"abstract":"The availability of multiple technologies, with micro and macro wireless cells, for network access combined with terminals capable of exploiting such diversity in wireless access requires the development of new mechanisms for optimized handover procedures. Appealing solutions should support network controlled handovers through heterogeneous technologies, preferably combined with a cross-layers two/three design. The IEEE 802.21 working group is currently standardizing the methods and the protocol potentially able to provide such a solution. In this paper we analyze the impact of signaling timing on network controlled handovers execution and performance in this environment. Through an extensive simulation study, we obtain results, that can be exploited in both terminal and handover procedure designs.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116480022","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}
In this paper, Chase decoding algorithm for turbo product codes (TPCs) built with multi-error-correcting codes is investigated. A method is proposed to reduce the decoding of test patterns (TPs) as well as the calculation of syndromes and metrics. In the beginning, syndromes and metrics of the first half of TPs are calculated recursively. After decoding of one TP, according to the error bit positions, other TPs that will have the same decoded codeword are identified and rejected from decoding. In the mean time, if these TPs fall into the range of second half of TPs, their syndromes and metrics need not to be calculated either. Simulations results for TPCs built with eBCH(64,51,6,2) or eBCH(64,45,8,3) are presented to demonstrate the efficiency of the proposed method. Moreover, this method that reduces the inherent redundancy in Chase decoding does not cause any degradation in coding gain.
{"title":"An Efficient Decoder for Turbo Product Codes with Multi-Error Correcting Codes","authors":"G. Chen, Lei Cao, Lun Yu, C. Chen","doi":"10.1109/WCNC.2007.21","DOIUrl":"https://doi.org/10.1109/WCNC.2007.21","url":null,"abstract":"In this paper, Chase decoding algorithm for turbo product codes (TPCs) built with multi-error-correcting codes is investigated. A method is proposed to reduce the decoding of test patterns (TPs) as well as the calculation of syndromes and metrics. In the beginning, syndromes and metrics of the first half of TPs are calculated recursively. After decoding of one TP, according to the error bit positions, other TPs that will have the same decoded codeword are identified and rejected from decoding. In the mean time, if these TPs fall into the range of second half of TPs, their syndromes and metrics need not to be calculated either. Simulations results for TPCs built with eBCH(64,51,6,2) or eBCH(64,45,8,3) are presented to demonstrate the efficiency of the proposed method. Moreover, this method that reduces the inherent redundancy in Chase decoding does not cause any degradation in coding gain.","PeriodicalId":292621,"journal":{"name":"2007 IEEE Wireless Communications and Networking Conference","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124330982","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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