| 一种基于混合星座编码的全速率全分集准正交空时分组码 |
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| 引用本文： | 尹训锋,刘敬芝,曾凡鑫. 一种基于混合星座编码的全速率全分集准正交空时分组码[J]. 电子信息对抗技术, 2007, 22(5): 33-36,42 |
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| 作者姓名： | 尹训锋 刘敬芝 曾凡鑫 |
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| 作者单位： | 重庆通信学院,重庆,400035 |
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| 基金项目： | 重庆市科委自然科学基金计划资助项目(2006BB2132) |
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| 摘 要： | 准正交空时分组码对发射天线数大于2的复信号能够实现全速率的发射,它在低信噪比的情况下有比较好的性能,但是由于准正交空时分组码不是全发射分集的,因而在高信噪比时性能并不优越。为了改善准正交空时分组码在高信噪比时的性能,本文采用对准正交空时分组码进行混合星座编码的形式来提高准正交空时分组码的分集度。仿真及计算结果显示,采用混合星座编码能在少量频带利用率损失的情况下大幅提高准正交空时分组码的性能。
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| 关 键 词： | MIMO 准正交空时分组码 混合星座 最大似然译码 |
| 文章编号： | CN51-1694（2007）05-0033-04 |
| 修稿时间： | 2007-01-222007-03-12 |
A Full-Rate, Full-Diversity Quasi-Orthogonal Space-Time Block Codes with Mixed Constellation Code |
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| YIN Xun-feng,LIU Jing-zhi,ZENG Fan-xin. A Full-Rate, Full-Diversity Quasi-Orthogonal Space-Time Block Codes with Mixed Constellation Code[J]. , 2007, 22(5): 33-36,42 |
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| Authors: | YIN Xun-feng LIU Jing-zhi ZENG Fan-xin |
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| Affiliation: | Chongqing Communication Institute, Chongqing 400035, China |
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| Abstract: | Quasi-orthogonal space-time block codes(QOSTBC) can provide full rate of complex signal constellation when more than two antennas are used at transmitter.QOSTBC have better performance at low signal-to-noise ratios(SNR).QOSTBC is not full diversity.This defect restricts the performance of QOSTBC at high SNR.In order to improve the performance of QOSTBC at high SNR,a mixed-constellation coding for QOSTBC is proposed in this paper.The proposed scheme can improve the diversity of QOSTBC.Simulation and calculation results show that the mixed-constellation coding can provide better performance for QOSTBC with slight reduce of spectral efficiency. |
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| Keywords: | MIMO quasi-orthogonal space-time block codes(QOSTBC) mixed constellation maximum likelihood decoding |
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