A bandwidth efficient two-user cooperative diversity system with limited feedback
A bandwidth efficient two-user cooperative diversity system with limited feedback
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DOI：
10.1007/s11432-009-0104-y
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Jing Li;J. Ge;Yong Wang;YunShuai Tang;Xiong Xiong-Xiong
中科院分区：
文献类型：
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作者：
Jing Li;J. Ge;Yong Wang;YunShuai Tang;Xiong Xiong-Xiong
提出一种基于Alamouti信令的二用户协作分集系统，利用Alamouti信令的正交结构，使协作用户在共享信道资源上进行中继，从而提高传统协作系统的频谱效率。当用户使用多进制相移键控（M-PSK）调制和具有有限反馈的改进选择解码转发（SDF）中继协议并且基站配置m（m⩾1）个接收天线时，推导了统计上相似的上行链路信道的平均误码率（BER）系统性能，并通过仿真进行了验证。在各种感兴趣的信道场景下，数值和仿真结果表明，所实现的分集增益和所提出系统的 BER 性能随着用户间信道质量的提高而增加，并且可以获得足够高的用户间信噪比 (SNR) 的完整发射分集阶数 2。
A two-user cooperative diversity system based on Alamouti signaling was proposed, which utilizes the orthogonal structure of Alamouti signaling to make cooperative users relay on the shared channel resources so that the spectral efficiency of the traditional cooperative system can be improved. WhenM-ary phase shift keying (M-PSK) modulation and an improved selection decode-and-forward (SDF) relaying protocol with limited feedback are used at the users andm(m⩾1) receive antennas are configured at the base station, the average bit-error-rate (BER) system performance for statistically similar uplink channels was derived and it was verified by simulations. Under various channel scenarios of interest, numerical and simulation results show that the diversity gain achieved and the BER performance of the proposed system increase with the interuser channel quality, and the full transmit diversity order of two can be obtained for sufficiently high interuser signal-to-noise ratios (SNRs).