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A VERTICAL LAYERED SPACE-TIME CODE AND ITS CLOSED-FORM BLIND SYMBOL DETECTION 被引量:1
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作者 Zhao Zheng Yin Qinye Zhang Hong Feng Aigang (Institute of Information Engineering, Xi’an .Jiaotong University, Xi’an 710049) 《Journal of Electronics(China)》 2003年第2期102-109,共8页
Vertical layered space-time codes have demonstrated the enormous potential to accommodate rapid flow data. Thus far, vertical layered space-time codes assumed that perfect estimates of current channel fading condition... Vertical layered space-time codes have demonstrated the enormous potential to accommodate rapid flow data. Thus far, vertical layered space-time codes assumed that perfect estimates of current channel fading conditions are available at the receiver. However, increasing the number of transmit antennas increases the required training interval and reduces the available time in which data may be transmitted before the fading coefficients change. In this paper, a vertical layered space-time code is proposed. By applying the subspace method to the layered space-time code, the symbols can be detected without training symbols and channel estimates at the transmitter or the receiver. Monte Carlo simulations show that performance can approach that of the detection method with the knowledge of the channel. 展开更多
关键词 layered space-time code Array signal processing Subspace method Blind symbol detection
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V-BLAST BASED LDPC-CODED RELAY COOPERATION 被引量:1
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作者 唐蕾 仰枫帆 +1 位作者 张顺外 范立行 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2013年第4期374-382,共9页
An efficient LDPC-coded multi-relay cooperation architecture is proposed based on virtual vertical Bell Labs layered space-time (V-BLAST) processing for uplink communication, where minimum-mean-square-error (MMSE)... An efficient LDPC-coded multi-relay cooperation architecture is proposed based on virtual vertical Bell Labs layered space-time (V-BLAST) processing for uplink communication, where minimum-mean-square-error (MMSE) and BP-based joint iterative decoding based on the introduced muhi-layer Tanner graph are effectively de- signed to detect and decode the corrupted received sequence at the destination. By introducing V-BLAST transmis- sion to the coded multi-relay cooperation, relays send their streams of symbols simultaneously, which increases the data rate and significantly reduces the transmission delay. The theoretical analysis and numerical results show that the new LDPC coded cooperation scheme outperforms the coded non-cooperation under the same code rate, and it also achieves a good trade-off among the performance, signal delay, and the encoding complexity associated with the number of relays. The performance gain can be credited to the proposed V-BLAST processing architecture and BP-based joint iterative decoding by the introduced multi-layer Tanner graph at a receiver-side. 展开更多
关键词 coded multi-relay cooperation vertical Bell Labs layered space-time processing (V-BLAST) mini-mum-mean-square-error detector~ joint decoding multi-layer Tanner graph
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BLIND MULTIUSER DETECTION FOR V-BLAST CODED MULTICARRIER CDMA SYSTEM
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作者 Deng Ke Yin Qinye Zhang Hong 《Journal of Electronics(China)》 2006年第1期14-19,共6页
Focusing on the space-time coded multiuser mobile communication systems in the frequency-selective fading environment, this paper proposes a Vertical Bell labs LAyered Space-Time (V-BLAST) coded Multicarrier Code-Divi... Focusing on the space-time coded multiuser mobile communication systems in the frequency-selective fading environment, this paper proposes a Vertical Bell labs LAyered Space-Time (V-BLAST) coded Multicarrier Code-Division Multiple-Access (MC-CDMA) scheme and its blind channel identification algorithm. This algorithm employs an ESPRIT-like method and the singular value decomposition, and the channels between every transmit antenna of every user and every receive antenna of the base station are blindly estimated with a closed-form solution. Based on it, an equivalent Minimum Mean-Squared Error (MMSE) time-domain multiuser detector is derived. Moreover, the proposed scheme exploits the precoding in the transmitter in order to eliminate the constraint of more receive antennas than transmit ones, required by most conventional V-BLAST codec schemes. Computer simulation results demonstrate the validity of this proposed scheme. 展开更多
关键词 MULTICARRIER code-division multiple-access Vertical Bell labs layered space-time code Multiuser detection
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基于频谱扩展分层空时编码的水声通信方案 被引量:2
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作者 张歆 孙小亮 张小蓟 《西北工业大学学报》 EI CAS CSCD 北大核心 2010年第2期192-196,共5页
高频谱利用率的技术一直是应用于带限水声信道中通信系统研究的热点。文章提出了基于空时分层编码和频谱扩展的空域并行发射方案。空时分层发射信号用相同的扩频码进行频谱扩展,从不同的换能器发射。接收机利用不同路径的传播时延和Rak... 高频谱利用率的技术一直是应用于带限水声信道中通信系统研究的热点。文章提出了基于空时分层编码和频谱扩展的空域并行发射方案。空时分层发射信号用相同的扩频码进行频谱扩展,从不同的换能器发射。接收机利用不同路径的传播时延和Rake接收,只需要一个接收水听器就可以实现分层信号的检测和干扰抵消。多径水声信道中的仿真表明,在数据率相同的情况下,该方案相比单发射方案有更好的误码率性能,在低复杂度和高速传输性能方面具有较大优势。 展开更多
关键词 空时分层编码 空时分层扩频编码 RAKE接收 水声通信 多径信道
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分层空时码多载波CDMA的译码与检测 被引量:1
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作者 杨洁 酆广增 《中国工程科学》 2007年第1期58-62,共5页
研究V-BLAST MIMO MC-CDMA下行系统。提出了一种对每个子载波进行V-BLAST译码的非线性算法,对不同天线数、用户数情况进行了系统的仿真和分析,并对V-BLAST译码的线性和非线性算法进行了系统仿真比较。
关键词 多输入多输出 正交频分复用 分层空时码 迫零算法 最小均方误差
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一种针对混合空时编码解码方案的改进 被引量:1
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作者 张殷 蒋铃鸽 何晨 《上海交通大学学报》 EI CAS CSCD 北大核心 2006年第1期72-75,81,共5页
针对结合空时分组码(STBC)及分层空时码(V-BLAST)的混合空时编码结构,提出了一种新型的接收解码方案.该方案首先对发送矢量、信道矩阵及接收矢量进行简单的拓展重构,然后直接进行V-BLAST串行干扰消除检测算法,充分利用了STBC的分集增益... 针对结合空时分组码(STBC)及分层空时码(V-BLAST)的混合空时编码结构,提出了一种新型的接收解码方案.该方案首先对发送矢量、信道矩阵及接收矢量进行简单的拓展重构,然后直接进行V-BLAST串行干扰消除检测算法,充分利用了STBC的分集增益及V-BLAST串行干扰消除译码的优势.仿真结果表明,对于STBC占较大比重的混合空时编码结构或接收天线数量大于发送天线数量的情况,这种新型的接收解码方案的误码率性能相对于传统的解码方案优势尤其明显,适用于上行链路使用. 展开更多
关键词 空时分组码 分层空时编码 矩阵重构
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Optimal MMSE successive interference cancellation in group-wise STBC MIMO systems
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作者 Fan Xun Zhang Haibin Luo Hanwen Huang Jianguo 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2006年第1期85-90,共6页
An optimal minimum mean square error successive interference cancellation (OMMSE SIC) scheme for Groupwise space-time block coding (G-STBC) multiple-input multiple-output (MIMO) systems is presented. In such a s... An optimal minimum mean square error successive interference cancellation (OMMSE SIC) scheme for Groupwise space-time block coding (G-STBC) multiple-input multiple-output (MIMO) systems is presented. In such a system, transmit antennas are partitioned into several STBC encoding groups and each group transmits independent data stream which is individually STBC encoded. On the receiver side, by exploring the temporal constraint provided by STBC, an equivalent channel model similar to the one in standard vertical Bell laboratories layered space-time (V-BLAST) systems is generated. Then OMMSE SIC algorithm is performed to detect all the transmitted information. Simulation compares the proposed scheme with non-ordering MMSE SIC scheme and the corresponding equal data rate scheme in V-BLAST systems with the same receive antennas' number. Result shows that the proposed scheme has better performance than non-ordering MMSE SIC scheme and by introducing more transmit antennas and adopting the OMMSE SIC scheme, better performance also can be achieved than corresponding V-BLAST systems. 展开更多
关键词 multi-input MULTI-OUTPUT vertical Bell laboratories layered space-time space-time block coding minimum mean square error
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Symbols detection for frequency-selective V-BLAST OFDM systems
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作者 WuXiaojun LiXing WangJilong 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2005年第2期418-425,共8页
As the combining form of the orthogonal frequency-division multiplexing (OFDM) technique and the vertical Bell Labs layered space-time (V-BLAST) architecture, the V-BLAST OFDM system can better meet the demand of next... As the combining form of the orthogonal frequency-division multiplexing (OFDM) technique and the vertical Bell Labs layered space-time (V-BLAST) architecture, the V-BLAST OFDM system can better meet the demand of next-generation (NextG) broadband mobile wireless multimedia communications. The symbols detection problem of the V-BLAST OFDM system is investigated under the frequency-selective fading environment. The joint space-frequency demultiplexing operation is proposed in the V-BLAST OFDM system. Successively, one novel half-rate rotational invariance joint space-frequency coding scheme for the V-BLAST OFDM system is proposed. By elegantly exploiting the above rotational invariance property, we derive one direct symbols detection scheme without knowing channels state information (CSI) for the frequency-selective V-BLAST OFDM system. Extensive simulation results demonstrate the validity of the novel half-rate rotational invariance joint space-frequency coding scheme and the performance of the direct symbols detection scheme. 展开更多
关键词 orthogonal frequency-division multiplexing vertical Bell Labs layered space-time architecture symbols detection frequency-selective fading joint space-frequency demultiplexing rotational invariance joint space-frequency coding.
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大气激光通信中垂直分层空时码的研究与实现 被引量:4
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作者 王惠琴 曹明华 +1 位作者 贾科军 柯熙政 《光电子.激光》 EI CAS CSCD 北大核心 2012年第3期495-500,共6页
针对垂直分层空时(V-BLAST)码存在译码复杂度高、误码性能不理想等不足,本文将串行干扰消除(SIC)算法应用于V-BLAST码的译码中,提出了一种适合于大气激光通信的分层空时(LST)编码方案。采用仿真分析和硬件实验相结合的方法,验证了本文... 针对垂直分层空时(V-BLAST)码存在译码复杂度高、误码性能不理想等不足,本文将串行干扰消除(SIC)算法应用于V-BLAST码的译码中,提出了一种适合于大气激光通信的分层空时(LST)编码方案。采用仿真分析和硬件实验相结合的方法,验证了本文方案的正确性和合理性。实验结果证明了在大气激光通信中采用基于SIC算法的V-BLAST编码的可行性,为进一步提高通信的传输速率、改善系统性能提供了新方法和依据。 展开更多
关键词 大气激光通信 分层空时(lst)码 强度调制 串行干扰消除(SIC)算法
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