Pub Date : 2011-03-17DOI: 10.1109/NCC.2011.5734738
Akshay Kumar, R. Bhattacharjee, S. Goel
A number of radio channel models based on either geometrical or statistical methods have been proposed in literature. Many such models tend to simplify the scattering environment in indoor radio medium by assuming uniform distribution of scatterers and thereby overestimate the performance of the communication system. In this paper, we present a clustering based radio channel model for a wideband frequency selective Single Input Single Output (SISO) indoor wireless channel. With the transmitter and the receiver located at the foci of an ellipse, the scatterers are modeled to be present in form of clusters of scatterers distributed randomly inside the ellipse. Further, the size and hence number of scatterers inside the cluster may vary from cluster to cluster. Such representations of the scatterers are more realistic and therefore the proposed model is expected to provide better approximation to the actual indoor environment. The proposed model has been used to evaluate the performance of a generic SISO wireless link and the results are compared with those obtained using existing channel models. The proposed channel model can be extended to a frequency selective MIMO channel simulator enabling the performance evaluation of multi-antenna wideband communication systems.
{"title":"A clustering based channel model for indoor wireless communication","authors":"Akshay Kumar, R. Bhattacharjee, S. Goel","doi":"10.1109/NCC.2011.5734738","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734738","url":null,"abstract":"A number of radio channel models based on either geometrical or statistical methods have been proposed in literature. Many such models tend to simplify the scattering environment in indoor radio medium by assuming uniform distribution of scatterers and thereby overestimate the performance of the communication system. In this paper, we present a clustering based radio channel model for a wideband frequency selective Single Input Single Output (SISO) indoor wireless channel. With the transmitter and the receiver located at the foci of an ellipse, the scatterers are modeled to be present in form of clusters of scatterers distributed randomly inside the ellipse. Further, the size and hence number of scatterers inside the cluster may vary from cluster to cluster. Such representations of the scatterers are more realistic and therefore the proposed model is expected to provide better approximation to the actual indoor environment. The proposed model has been used to evaluate the performance of a generic SISO wireless link and the results are compared with those obtained using existing channel models. The proposed channel model can be extended to a frequency selective MIMO channel simulator enabling the performance evaluation of multi-antenna wideband communication systems.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122033790","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734781
R. Subadar, P. R. Sahu
Closed-form expressions for the channel capacity of an L-branch equal gain combining diversity receiver over Hoyt (Nakagami-q) fading channels is derived for adaptive transmission schemes. To obtain capacity expressions, probability density function of the combiner out put signal-to-noise ratio (SNR) is used. The capacity expressions are given in terms of Yacoub's integral, a general solution for which is presented in the literature recently. Further, an expression is derived for optimal cutoff SNR for the optimal power and rate adaptation scheme. A study on the effects of fading parameters and diversity order on the channel capacity of the systems for different techniques have been presented.
{"title":"Channel capacity of adaptive transmission schemes using equal gain combining receiver over Hoyt fading channels","authors":"R. Subadar, P. R. Sahu","doi":"10.1109/NCC.2011.5734781","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734781","url":null,"abstract":"Closed-form expressions for the channel capacity of an L-branch equal gain combining diversity receiver over Hoyt (Nakagami-q) fading channels is derived for adaptive transmission schemes. To obtain capacity expressions, probability density function of the combiner out put signal-to-noise ratio (SNR) is used. The capacity expressions are given in terms of Yacoub's integral, a general solution for which is presented in the literature recently. Further, an expression is derived for optimal cutoff SNR for the optimal power and rate adaptation scheme. A study on the effects of fading parameters and diversity order on the channel capacity of the systems for different techniques have been presented.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124054538","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734771
Sandeep Palakkal, K. Prabhu
We propose a strategy to combine the variance stabilizing transform (VST), used for Poisson image denoising, with the fast discrete Curvelet transform (FDCT). The VST transforms the Poisson image to approximately Gaussian distributed, and the subsequent denoising can be performed in the Gaussian domain. However, the performance of the VST degrades when the original image intensity is very low. On the other hand, the FDCT can sparsely represent the intrinsic features of images having discontinuities along smooth curves. Therefore, it is suitable for denoising applications. Combining the VST with the FDCT leads to good Poisson image denoising algorithms, even for low intensity images. We present a simple approach to achieve this and demonstrate some simulation results. The results show that the VST combined with the FDCT is a promising candidate for Poisson denoising.
{"title":"Poisson noise removal from images using the fast discrete Curvelet transform","authors":"Sandeep Palakkal, K. Prabhu","doi":"10.1109/NCC.2011.5734771","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734771","url":null,"abstract":"We propose a strategy to combine the variance stabilizing transform (VST), used for Poisson image denoising, with the fast discrete Curvelet transform (FDCT). The VST transforms the Poisson image to approximately Gaussian distributed, and the subsequent denoising can be performed in the Gaussian domain. However, the performance of the VST degrades when the original image intensity is very low. On the other hand, the FDCT can sparsely represent the intrinsic features of images having discontinuities along smooth curves. Therefore, it is suitable for denoising applications. Combining the VST with the FDCT leads to good Poisson image denoising algorithms, even for low intensity images. We present a simple approach to achieve this and demonstrate some simulation results. The results show that the VST combined with the FDCT is a promising candidate for Poisson denoising.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128538896","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}
Microscopes typically use a single color illumination source and the intensity of it can be varied depending on the application. They are used to observe various specimens which are usually stained to highlight the objects of interest. Automatic methods for identification of diseases from these specimens have been developed recently. The stains result in different colors and white illumination source may not offer the best contrast in all cases. Further, the staining process does not always result in the same color owing to the changes in the pH of the buffer used. This paper overcomes these problems by using a varying color illumination source for microscopes to offset the variations in the stain and ensures that the best contrast is achieved under all conditions. The results of segmentation of nucleus of White Blood Cells under varying color illuminations are shown as an example.
{"title":"Adaptive color illumination for microscopes","authors":"Vishnu Vardhan Makkapati, V. Pathangay","doi":"10.1117/12.853015","DOIUrl":"https://doi.org/10.1117/12.853015","url":null,"abstract":"Microscopes typically use a single color illumination source and the intensity of it can be varied depending on the application. They are used to observe various specimens which are usually stained to highlight the objects of interest. Automatic methods for identification of diseases from these specimens have been developed recently. The stains result in different colors and white illumination source may not offer the best contrast in all cases. Further, the staining process does not always result in the same color owing to the changes in the pH of the buffer used. This paper overcomes these problems by using a varying color illumination source for microscopes to offset the variations in the stain and ensures that the best contrast is achieved under all conditions. The results of segmentation of nucleus of White Blood Cells under varying color illuminations are shown as an example.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128164647","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734711
G. Potnis, D. Jalihal
Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to timing and frequency estimation errors. A DFT spread modified polyphase training sequence is proposed which has better merit factor and peak to average power ratio. By using the proposed training sequence two estimators are presented for timing and frequency synchronization. The CRLB expressions in closed form for these two estimators are also presented under the assumption of strict decoupling of timing and frequency offsets. Simulation results show that the MSE of the proposed estimators follow their respective CRLB
{"title":"Novel polyphase training sequence based synchronization estimator for OFDM","authors":"G. Potnis, D. Jalihal","doi":"10.1109/NCC.2011.5734711","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734711","url":null,"abstract":"Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to timing and frequency estimation errors. A DFT spread modified polyphase training sequence is proposed which has better merit factor and peak to average power ratio. By using the proposed training sequence two estimators are presented for timing and frequency synchronization. The CRLB expressions in closed form for these two estimators are also presented under the assumption of strict decoupling of timing and frequency offsets. Simulation results show that the MSE of the proposed estimators follow their respective CRLB","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131423978","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734764
M. Kartheek, Rakesh Misra, V. Sharma
We study the performance of cognitive (secondary) users in a cognitive radio network which uses a channel whenever the primary users are not using the channel. The usage of the channel by the primary users is modelled by an ON-OFF renewal process. The cognitive users may be transmitting data using TCP connections and voice traffic. The voice traffic is given priority over the data traffic. We theoretically compute the mean delay of TCP and voice packets and also the mean throughput of the different TCP connections. We compare the theoretical results with simulations.
{"title":"Performance analysis of data and voice connections in a cognitive radio network","authors":"M. Kartheek, Rakesh Misra, V. Sharma","doi":"10.1109/NCC.2011.5734764","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734764","url":null,"abstract":"We study the performance of cognitive (secondary) users in a cognitive radio network which uses a channel whenever the primary users are not using the channel. The usage of the channel by the primary users is modelled by an ON-OFF renewal process. The cognitive users may be transmitting data using TCP connections and voice traffic. The voice traffic is given priority over the data traffic. We theoretically compute the mean delay of TCP and voice packets and also the mean throughput of the different TCP connections. We compare the theoretical results with simulations.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121114632","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734744
Y. Choukiker, Sujeet Rai, S. K. Behera
A new form of modified CPW-fed half circle fractal patch antenna is proposed for dual band 2.4/5.2 GHz Wireless Local Area Network (WLAN) application. The circular shape antenna based on the Descartes Circle (DC) theorem and iteration of self similar design. The -10 dB return loss (VSWR 2∶1) impedance bandwidth in 2.4 GHz band is 28% and it covers the required bandwidth for 2.4 GHz WLAN. The 5.2 GHz resonant mode has impedance bandwidth of 40% covering 5.2/5.5/5.8 GHz WLAN bands. The EM characteristics of the antenna are presented by the current distribution. Proposed antenna maintained good radiation patterns with gain. Detailed design steps and results for the designs are studied and investigated in this paper.
{"title":"Modified Half-Circle fractal antenna using DC Theorem for 2.4/5.2 GHz WLAN application","authors":"Y. Choukiker, Sujeet Rai, S. K. Behera","doi":"10.1109/NCC.2011.5734744","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734744","url":null,"abstract":"A new form of modified CPW-fed half circle fractal patch antenna is proposed for dual band 2.4/5.2 GHz Wireless Local Area Network (WLAN) application. The circular shape antenna based on the Descartes Circle (DC) theorem and iteration of self similar design. The -10 dB return loss (VSWR 2∶1) impedance bandwidth in 2.4 GHz band is 28% and it covers the required bandwidth for 2.4 GHz WLAN. The 5.2 GHz resonant mode has impedance bandwidth of 40% covering 5.2/5.5/5.8 GHz WLAN bands. The EM characteristics of the antenna are presented by the current distribution. Proposed antenna maintained good radiation patterns with gain. Detailed design steps and results for the designs are studied and investigated in this paper.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116602045","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734747
T. Chakraborty, S. Chakrabarti
Traditional OFDM based transmission system uses Cyclic Prefix (CP) in an OFDM symbol in order to maintain orthogonality of transmission. Present days' Ultra-Wideband (UWB) systems use Multi-Band OFDM (MB-OFDM) techniques for transmission in application like Wireless Personal Area Network (WPAN). UWB based systems are power limited by the regulation of FCC. CP introduces correlation in the transmitted data sequence and hence introduces ripples in the power spectral density (PSD) of the transmitted data. This in turn reduces the range of data transmission. However, use of zero-pad suffix (ZPS) will have a flat PSD and hence does not suffer from the range degradation problem. In the receiver, ZP removal requires use of a technique called as overlap and add (OLA) in order to capture the multipath energy of the channel and maintain the orthogonality in the received data. During transmission, the length of the ZP is fixed and equal to the channel length. During reception, in traditional OFDM receiver, the OLA is done using a ZP length of same as channel length as transmitted. In UWB receiver the FFT window gets smeared due to multipath fading and hence estimation of true FFT window start point does affect the OLA process and hence the overall system performance. In this paper, we propose a method which adapts OLA length in UWB receiver depending on the current band of reception and the band wise estimated true FFT window start point. The proposed method is more beneficiary for high delay spread channel like channel model 4 (CM4). In CM4, the technique can achieve around 1 dB Eb/No gain at 10−2 of BER, while simulated over uncoded MB-OFDM based UWB system.
传统的基于OFDM的传输系统在OFDM符号中使用循环前缀(CP)来保持传输的正交性。目前的超宽带(UWB)系统在无线个人区域网络(WPAN)等应用中使用多频段OFDM (MB-OFDM)技术进行传输。基于UWB的系统受到FCC的功率限制。CP在传输数据序列中引入了相关性，从而在传输数据的功率谱密度(PSD)中引入了波纹。这反过来又减少了数据传输的范围。然而，使用零垫后缀(ZPS)将有一个平坦的PSD，因此不会遭受范围退化问题。在接收器中，去除ZP需要使用一种称为重叠和添加(OLA)的技术，以捕获信道的多路径能量并保持接收数据的正交性。在传输过程中，ZP的长度是固定的，等于信道长度。在传统的OFDM接收机中，在接收过程中，使用与发送信道长度相同的ZP长度来完成OLA。在UWB接收机中，FFT窗口由于多径衰落而被涂抹，因此对真实FFT窗口起点的估计确实会影响OLA过程，从而影响整体系统性能。在本文中，我们提出了一种根据当前接收频带和频带估计的真FFT窗口起始点来适应UWB接收机中OLA长度的方法。该方法更适用于信道模型4 (CM4)等高时延扩频信道。在CM4中，该技术可以在BER的10−2下获得约1 dB Eb/No增益，同时在基于非编码MB-OFDM的UWB系统上进行仿真。
{"title":"Adaptive overlap-and-add technique in MB-OFDM based UWB receiver design","authors":"T. Chakraborty, S. Chakrabarti","doi":"10.1109/NCC.2011.5734747","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734747","url":null,"abstract":"Traditional OFDM based transmission system uses Cyclic Prefix (CP) in an OFDM symbol in order to maintain orthogonality of transmission. Present days' Ultra-Wideband (UWB) systems use Multi-Band OFDM (MB-OFDM) techniques for transmission in application like Wireless Personal Area Network (WPAN). UWB based systems are power limited by the regulation of FCC. CP introduces correlation in the transmitted data sequence and hence introduces ripples in the power spectral density (PSD) of the transmitted data. This in turn reduces the range of data transmission. However, use of zero-pad suffix (ZPS) will have a flat PSD and hence does not suffer from the range degradation problem. In the receiver, ZP removal requires use of a technique called as overlap and add (OLA) in order to capture the multipath energy of the channel and maintain the orthogonality in the received data. During transmission, the length of the ZP is fixed and equal to the channel length. During reception, in traditional OFDM receiver, the OLA is done using a ZP length of same as channel length as transmitted. In UWB receiver the FFT window gets smeared due to multipath fading and hence estimation of true FFT window start point does affect the OLA process and hence the overall system performance. In this paper, we propose a method which adapts OLA length in UWB receiver depending on the current band of reception and the band wise estimated true FFT window start point. The proposed method is more beneficiary for high delay spread channel like channel model 4 (CM4). In CM4, the technique can achieve around 1 dB Eb/No gain at 10−2 of BER, while simulated over uncoded MB-OFDM based UWB system.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121732606","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734742
S. Baghel, M. A. Ingale, Giriraj Goyal
Interference due to in-device coexistence of multiple radios operating simultaneously in adjacent or overlapping radio frequency spectrum is a big issue. In this article, we understand the nature of issues related to coexistence of LTE with ISM technologies (Bluetooth, WiFi) and GNSS in a mobile handset. Each of these technologies have different characteristics such as different access mechanism, frame structure, peak transmit power and operate in different frequencies. We analyze the charecteristics of each technology and propose possible direction so that in-device coexistence interference for certain popular use cases can be mitigated.
{"title":"Coexistence possibilities of LTE with ISM technologies and GNSS","authors":"S. Baghel, M. A. Ingale, Giriraj Goyal","doi":"10.1109/NCC.2011.5734742","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734742","url":null,"abstract":"Interference due to in-device coexistence of multiple radios operating simultaneously in adjacent or overlapping radio frequency spectrum is a big issue. In this article, we understand the nature of issues related to coexistence of LTE with ISM technologies (Bluetooth, WiFi) and GNSS in a mobile handset. Each of these technologies have different characteristics such as different access mechanism, frame structure, peak transmit power and operate in different frequencies. We analyze the charecteristics of each technology and propose possible direction so that in-device coexistence interference for certain popular use cases can be mitigated.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124906012","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 : 2011-03-17DOI: 10.1109/NCC.2011.5734740
M. Bansal, A. Trivedi
Multiple-Input Multiple-Output (MIMO) technology has great potential for improving the throughput of Wireless Mesh Networks (WMNs). In this paper, we investigate the joint stream allocation and scheduling problem for single-user MIMO communication in WMNs with the objective of maximizing the demand satisfaction for a set of flows. The notion of transmission configuration (TC) is introduced and a heuristic algorithm is proposed to find a good subset of all possible TCs. Using these TCs, the joint stream allocation and scheduling problem is formulated as a linear programming (LP) and a convex program (CP) to obtain the maximum throughput and proportional fair solutions. To find the optimal solutions, we also introduce a scheme to enumerate all possible TCs. The simulation results demonstrate that performance of the proposed heuristic algorithm is very near to the optimal solution. The computational complexity of the proposed heuristic algorithm is substantially less compared to the optimal. In addition, we show that as the number of antennas increases, the demand satisfaction and the network throughput increase linearly.
{"title":"Joint stream allocation and scheduling for single-user MIMO communication in WMNs","authors":"M. Bansal, A. Trivedi","doi":"10.1109/NCC.2011.5734740","DOIUrl":"https://doi.org/10.1109/NCC.2011.5734740","url":null,"abstract":"Multiple-Input Multiple-Output (MIMO) technology has great potential for improving the throughput of Wireless Mesh Networks (WMNs). In this paper, we investigate the joint stream allocation and scheduling problem for single-user MIMO communication in WMNs with the objective of maximizing the demand satisfaction for a set of flows. The notion of transmission configuration (TC) is introduced and a heuristic algorithm is proposed to find a good subset of all possible TCs. Using these TCs, the joint stream allocation and scheduling problem is formulated as a linear programming (LP) and a convex program (CP) to obtain the maximum throughput and proportional fair solutions. To find the optimal solutions, we also introduce a scheme to enumerate all possible TCs. The simulation results demonstrate that performance of the proposed heuristic algorithm is very near to the optimal solution. The computational complexity of the proposed heuristic algorithm is substantially less compared to the optimal. In addition, we show that as the number of antennas increases, the demand satisfaction and the network throughput increase linearly.","PeriodicalId":158295,"journal":{"name":"2011 National Conference on Communications (NCC)","volume":"172 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114017909","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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