共查询到16条相似文献,搜索用时 125 毫秒
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基于MIMO的垂直分层空时码检测算法 总被引:1,自引:0,他引:1
分层空时码(BLAST)是贝尔实验室提出的一种基于多入多出(MIMO)传输方式的空时码系统。本文着重研究了BLAST系统中一类垂直分层空时码的检测算法,依据信号模型,分析推导了基于迫零准则和最小均方误差准则的估计算法,并在此基础上采用了以上算法与判决反馈及最佳排序思想结合的方法,使系统的误码率性能得到了提高。最后通过仿真实验比较了各种算法的性能和特点,结果表明分层空时码用于无线通信具有极大优势。 相似文献
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垂直分层空时码系统(V-BLAST)是贝尔实验室提出的一种基于多输入多输出(MIMO)传输方式的空时码系统。本文介绍了V-BLAST的系统模型、信道容量和Golden检测算法,并把该算法的仿真结果和单发单收系统的性能进行了比较。仿真结果显示V-BLAST系统比传统通信系统的频谱利用率要高。 相似文献
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主要介绍了基于多输入多输出(MIMO)传输方式的垂直分层空时码系统(V—BLAST)空时码系统的检测算法,并把它与传统的MIMO信号检测算法进行了分析和比较,仿真得出相关结论。 相似文献
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垂直分层空时码(V-BLAST)是贝尔实验室提出的一种基于多入多出(MIMO)传输方式的空时码系统,其检测算法是MIMO系统的有效检测方法。首先介绍V-BLAST系统的信号模型,在此基础上应用不同的信号估计准则推导出不同的检测算法,最后通过仿真实验对各种算法的性能和优缺点进行了分析和比较。 相似文献
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多输入多输出(MIMO)系统可以有效提高频谱效率和系统容量。基于MIMO系统重点研究了无线光通信垂直分层空时系统(V-BLAST)检测算法。首先分析了最大似然、线性迫零、最小均方误差以及排序干扰抵消等典型的传统检测算法,基于OOK调制和4PPM调制对采用不同检测算法的系统差错性能进行了仿真对比,最后对Turbo码与BLAST技术相结合构成的新系统采用了软输入软输出(SISO)迭代检测译码方案。仿真结果表明,分层空时检测算法中性能最优的是ML,其次是SISO-MAP,ZF算法性能最差;Turbo-BLAST系统可以有效提高无线光通信系统的抗干扰性能。 相似文献
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针对多输入多输出(MIMO)系统,当发射端已知信道状态信息时,提出基于信道矩阵奇异值分解(SVD)的空时编码(STC)传输方案SVD-STC,并推导出相应的群检测算法.SVD-STC是分层空时(LST)码和空时网格码(STTC)的混合形式,在传输率和分集之间取得折衷.由于采用奇异值分解,SVD-STC具有不等保护特性,可以与信源编码结合,实现图像分等级传输,显著提高重建图像的质量,同时具有较高的传输率,适用于固定无线通信系统中的多媒体传输. 相似文献
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Dong Wei Li Ji ong Chen Liang Broadb Wireless Communications Laboratory Information Science Institute State Key Laboratory of Integrated Service Networks PO Box Xidian University Xi 'an China 《中国通信》2008,6(4):143-149
Based on the new discrete particle swarm op-timization(NDPSO) and the mutation operation of the genetic algorithm,a hybrid discrete particle swarm op-timization(HDPSO) algorithm is proposed and applied to the signal detection of the Vertical Bell-Labs Layered Space-Time(V-BLAST)system.Then two detection ap-proaches that employ the HDPSO and parallel interfer-ence cancellation(PIC) algorithms in V-BLAST system are proposed.One of approaches is that the HDPSO algorithm is used as the first stage of the PIC to... 相似文献
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《Wireless Communications, IEEE Transactions on》2009,8(6):2860-2865
A fast recursive algorithm for the vertical Bell Laboratories layered space-time (V-BLAST) with the optimal ordered successive interference cancellation (SIC) detection has been proposed by Benesty-Huang-Chen and two improved algorithms have been also recently introduced by Szczeci ′nski-Massicotte and Zhu-Lei-Chin independently. In this letter, our first contribution is to incorporate the existing improvements into the original fast recursive algorithm to provide the fastest known algorithm for the optimal ordered SIC detection of V-BLAST. Subsequently, we propose two new algorithms that result from one further improvement for the fast recursive algorithm. Compared with the fastest known algorithm built from the existing improvements, one new proposed algorithm has a speedup of 1.3 times in both the number of multiplications and the number of additions, and the other new proposed algorithm requires less intermediate variables and saves memories. 相似文献
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分层空时结构(BLAST)是一种通过使用多根发射天线和接收天线,以及在接收端使用先进的信号处理技术来获得高频谱效率的技术。主要研究了基于MMSE的迭代软判决干扰抵消(ISDIC)算法在V BLAST系统中的应用。仿真结果表明,相对于传统的检测算法,其性能至少有1 dB的增益。 相似文献
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In this paper, in order to reduce the computational complexity of the detector of vertical Bell Laboratories layered space-time
(V-BLAST) system over time-varying channels, an adaptive detection scheme is proposed based on parallel interference cancellation
(PIC). The presented scheme has three units, which are primary adaptive detector, detection ordering determiner, and adaptive
PIC detector. The proposed scheme can employ many of known adaptive algorithms for detection of V-BLAST system. In this paper,
we present computational complexity of the proposed scheme using LMS, RLS, APA and AMSER adaptive algorithms and evaluate
its performance with numerical simulations.
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Paeiz AzmiEmail: |