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2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications最新文献

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Two Stage Bit-Interleaved Coded Modulation for Multiple-Input Multiple-Output Channels 多输入多输出信道的两级位交错编码调制
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346378
H. Sawaya
{"title":"Two Stage Bit-Interleaved Coded Modulation for Multiple-Input Multiple-Output Channels","authors":"H. Sawaya","doi":"10.1109/SPAWC.2006.346378","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346378","url":null,"abstract":"This paper introduces a two stage bit-interleaved coded modulation for the transmission of a 16-QAM constellation over a multiple-input multiple-output (MIMO) non-ergodic block fading channel. The channel is assumed to be perfectly known at the receiver but not at the transmitter. Iterative multistage decoding is done. The performance of the system is derived using Monte Carlo simulation. Compared to a single stage bit-interleaved coded modulation (BICM), results show that a 1 dB gain in performance is reached. Moreover, the scheme is of great interest for the construction of unequal protection schemes (UEP) where the degree of protection depends on the code rate at each level","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"45 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120812818","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}
引用次数: 2
Performance Analysis of Collaborative Hybrid-ARQ Incremental Redundancy Protocols Over Fading Channels 衰落信道下协同混合- arq增量冗余协议性能分析
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346342
I. Stanojev, O. Simeone, Y. Bar-Ness
{"title":"Performance Analysis of Collaborative Hybrid-ARQ Incremental Redundancy Protocols Over Fading Channels","authors":"I. Stanojev, O. Simeone, Y. Bar-Ness","doi":"10.1109/SPAWC.2006.346342","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346342","url":null,"abstract":"Future wireless communication systems are expected to rely heavily on spatial diversity for mitigation of fading impairments. In scenarios where practical constraints prevent the collocation of multiple antennas on a single user terminal, collaboration between single-antenna nodes becomes the only viable solution. Among cooperative schemes, collaborative ARQ transmission protocols, prescribing cooperation only upon erroneous decoding by the destination, emerge as an interesting solution in terms of achievable spectral efficiency. In this paper, an information theoretical approach is presented for assessing the performance of collaborative hybrid-ARQ protocol based on incremental redundancy. Upper and lower bounds for the expected number of retransmissions and the average throughput are derived in explicit form, for any number of relays. Numerical results are presented to supplement the analysis and give insight into the performance of the considered scheme","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129775178","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}
引用次数: 36
Iterative Waterfilling for Weighted Rate Sum Maximization in MIMO-MAC MIMO-MAC中加权速率和最大化的迭代注水
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346338
M. Kobayashi, G. Caire
{"title":"Iterative Waterfilling for Weighted Rate Sum Maximization in MIMO-MAC","authors":"M. Kobayashi, G. Caire","doi":"10.1109/SPAWC.2006.346338","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346338","url":null,"abstract":"We consider the weighted sum rate maximization in Gaussian MIMO multiple access channel (MAC) under individual power constraints. This problem arises in the stability-wise optimal scheduling policy that allocates the resource as a function of the buffer queue states and the channel matrices in each time slot. The straightforward generalization of Yu et al.'s well-known iterative waterfilling algorithm for the sum rate maximization is non-trivial because the problem cannot reduce to decoupled single-user waterfilling-type solutions with arbitrary weights. Therefore, we propose a simple alternative treating multiple antennas at each transmitter as virtual single-antenna transmitters, which enables a iterative waterfilling-type algorithm. For a special case such as a OFDM-MAC, the proposed algorithm converges to the optimal solution faster than a steepest ascent algorithm and makes the convergence speed independent of the number of subcarriers","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126903824","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}
引用次数: 15
Achievable Rates of Multi-Hop and Cooperative MIMO Amplify-and-Forward Relay Systems with Full CSI 具有完整CSI的多跳和协同MIMO放大和转发中继系统的可实现速率
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346423
Nicola Varanese, O. Simeone, Y. Bar-Ness, U. Spagnolini
{"title":"Achievable Rates of Multi-Hop and Cooperative MIMO Amplify-and-Forward Relay Systems with Full CSI","authors":"Nicola Varanese, O. Simeone, Y. Bar-Ness, U. Spagnolini","doi":"10.1109/SPAWC.2006.346423","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346423","url":null,"abstract":"In this paper, two types of MIMO amplify-and-forward relay systems are considered: multi-hop and cooperative. For both cases, the problem of maximizing the achievable rate over the covariance matrices of the symbols transmitted by the source and relay linear processing matrix is formulated under the assumption of full channel state information at each node. A sub-optimal iterative algorithm is proposed and proved by numerical simulations to outperform known schemes","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130417441","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}
引用次数: 13
Frame-Timing Acquisition for UWB Signals Via the Multifamily Likelihood Ratio Test 基于多族似然比检验的UWB信号帧时采集
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346402
J. López-Salcedo, G. Vázquez
{"title":"Frame-Timing Acquisition for UWB Signals Via the Multifamily Likelihood Ratio Test","authors":"J. López-Salcedo, G. Vázquez","doi":"10.1109/SPAWC.2006.346402","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346402","url":null,"abstract":"This paper addresses the problem of maximum likelihood frame-timing acquisition for UWB signals when neither the transmitted symbols nor the transmitted waveform are known at the receiver. The main contribution is the interpretation of the maximum likelihood cost function as a problem of model order selection. As a result, a reduced complexity frame-timing estimator is proposed based on the multifamily likelihood ratio test. While still outperforming existing frame-timing acquisition techniques, the proposed method provides a tradeoff between performance and implementation complexity with respect to the more complex and optimal maximum likelihood solution","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126741414","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}
引用次数: 1
Detection of Delay-Hopped Transmitted-Reference UWB Signals Under Narrowband Interference 窄带干扰下延迟跳变传输参考超宽带信号的检测
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346417
Y. Alemseged, K. Witrisal
{"title":"Detection of Delay-Hopped Transmitted-Reference UWB Signals Under Narrowband Interference","authors":"Y. Alemseged, K. Witrisal","doi":"10.1109/SPAWC.2006.346417","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346417","url":null,"abstract":"This paper presents a detection scheme for delay-hopped transmitted reference (TR) UWB communication systems, as the original TR technique proposed by Hoctor and Tomlinson, in the presence of narrowband interference (NBI). We derive a chip level data model which takes into account the effects of NBI and noise. The validity of the model is shown, enabling superior performance by using least squares detection algorithms. Simulation results are conducted under a practical scenario where the UWB transmission coexists with an IEEE802.11a WLAN service","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123102796","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}
引用次数: 6
A New Iterative Equalizer based on a Deterministic Annealing Process 一种基于确定性退火过程的迭代均衡器
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346414
M. Pourmir, A. Berthet, F.S. Agathe
{"title":"A New Iterative Equalizer based on a Deterministic Annealing Process","authors":"M. Pourmir, A. Berthet, F.S. Agathe","doi":"10.1109/SPAWC.2006.346414","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346414","url":null,"abstract":"We describe a new iterative equalizer able to approach the maximum likelihood sequence estimation (MLSE) performance with manageable complexity. This algorithm takes the general form of a continuation or deterministic annealing process. Starting from an exact formulation of the algorithm, we derive a series of approximations, leading to a final structure which has some similarities with the conventional block-iterative minimum mean square error (MMSE) equalizer","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114081089","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}
引用次数: 0
Iterative THP Transceiver Optimization for Multi-User MIMO Systems Based on Weighted Sum-Mse Minimization 基于加权和mse最小化的多用户MIMO系统THP收发器迭代优化
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346470
A. Mezghani, R. Hunger, M. Joham, W. Utschick
{"title":"Iterative THP Transceiver Optimization for Multi-User MIMO Systems Based on Weighted Sum-Mse Minimization","authors":"A. Mezghani, R. Hunger, M. Joham, W. Utschick","doi":"10.1109/SPAWC.2006.346470","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346470","url":null,"abstract":"We address the joint optimization of transmitter and receivers for a multi-user multiple-input multiple-output (MIMO) broadcast channel (BC) system under the assumption of perfect channel state information (CSI) at both transmitter and receivers. Tomlinson Harashima precoding (THP) is employed for interuser interference presubtraction and the mean square error (MSE) is minimized. Since the downlink problem is difficult to handle, we formulate an equivalent uplink problem by exploiting the duality between THP and decision feedback equalization (DFE). We present an iterative solution, which delivers suboptimum transmit and receive matrices as well as a suboptimum precoding order. The performance of the algorithm is studied theoretically and experimentally","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121196200","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}
引用次数: 35
Iterative Design of MIMO ARQ Transceiver for Decision Feedback Detection 决策反馈检测中MIMO ARQ收发器的迭代设计
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346352
H. Sun, Z. Ding, Chunming Zhao
{"title":"Iterative Design of MIMO ARQ Transceiver for Decision Feedback Detection","authors":"H. Sun, Z. Ding, Chunming Zhao","doi":"10.1109/SPAWC.2006.346352","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346352","url":null,"abstract":"This work investigates the problem of progressive transceiver design for multi-input multi-output (MIMO) systems with automatic repeat request (ARQ) capability. We consider a generic MIMO transceiver architecture that employs a linear transmission precoder and a linear decoder followed by intra-block decision feedback detector at the receiver. Our objective is to progressively design the optimal precoder and receiver feedback system to jointly minimize the mean square error (MSE) under the assumption of perfect feedback. Unlike in single transmission design, joint ARQ receivers cannot change previous precoders and existing results do not apply. In this paper, we propose an approach to design the precoder and receiver iteratively to achieve MSE performance close to the known lower-bound","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"13 17","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114044420","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}
引用次数: 0
Estimators for Time-Variant Channels Applied to UMTS-HSDPA 应用于UMTS-HSDPA的时变信道估计器
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346335
J. Wehinger, T. Zemen, K. Freudenthaler
{"title":"Estimators for Time-Variant Channels Applied to UMTS-HSDPA","authors":"J. Wehinger, T. Zemen, K. Freudenthaler","doi":"10.1109/SPAWC.2006.346335","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346335","url":null,"abstract":"In this work we analyze the mean-square error (MSE) of two correlative channel estimators in time-variant channels. Both estimators make use of orthogonal basis functions that approximate the time-variant channel. The first approximation is based on a set of time shifted rectangular basis (RB) functions. The second approximation makes use of Slepian basis (SB) functions. We calculate the number of basis functions that minimize the MSE for the RB-and the SB-approach. Both estimators are designed for the full velocity range using the maximum velocity as design parameter only. Further, we apply the two estimators to the high-speed downlink packet access (HSDPA) mode of UMTS and illustrate the impact of the MSE on the throughput. With the SB-approach we observe a gain of roughly 0.4 dB over the RB-functions in case of an i.i.d. Rayleigh multipath channel with five taps","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"13 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711504","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}
引用次数: 2
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