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总览 评价 曹誉文 1, , 蒋学芹 2,* ( 1、 东华大学信息学院; 2、 东华大学信息学院626; ) 摘要: 应用于多个发射天线(多于2个),同时经过线性处理的复杂的正交时空块码(space-time block codes)在MIMO(multiple-input and multiple-output)信道
曹誉文1,, 蒋学芹2,*
(
1、东华大学信息学院; 2、东华大学信息学院626; )
摘要:
应用于多个发射天线(多于2个),同时经过线性处理的复杂的正交时空块码(space-time block codes)在MIMO(multiple-input and multiple-output)信道中不能获得全发射速率。然而,当以牺牲分集优势为代价的情况下,系统可以获得全发射速率,甚至高于任一发射天线的发射速率。在这篇论文中,我们首次归纳了扩张型正交时空码(generalized extended orthogonal STBCs)。本论文显示了所提出的方案经过线性处理能够获得全发射速率,而且性能优于EO-STBCs。仿真结果表明,在误码率为10^(-5) 时,本论文所提出的GEO-STBCs编码方案误比特率优于EO-STBCs 4.2 dB。同时,仿真结果也表明, GEO-STBCs 编码的反馈性能增益在高信噪比区域随着信噪比的增长随指数增长。
关键词:
时空码;MIMO;分集增益; 误比特率;性能增益。
CAO Yuwen, JIANG Xueqing*
(
School of Information Science and Technology, Donghua University, Shanghai 201620; )
Abstract:
Complex orthogonal space-time block codes (STBCs) with linear processing for more than two transmit antennas cannot achieve a full rate in multiple-input and multiple-output (MIMO) channels. However, at the expense of losing some degree of diversity advantage, it is possible to achieve a full rate or even rates higher than one for any number of transmit antennas. In this paper, we first generalized the extended orthogonal space time block codes (GEO-STBCs). We show that the schemes can achieve a full transmit diversity with linear processing, and they outperform the extended orthogonal STBCs. Simulation results show that the bit error rate (BER) performance gain up to 4.2 dB over the EO-STBCs at the BER of . Moreover, it is shown that the feedback performance gain of the proposed GEO-STBCs scheme grows expontially with the high signal -to-noise ratio (SNR).
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