| 基于空时分组码的差分检测与相干检测 |
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| 引用本文： | 李正权,王斌,胡光锐,殷玲玲.基于空时分组码的差分检测与相干检测[J].扬州大学学报(自然科学版),2005,8(4):53-56. |
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| 作者姓名： | 李正权 王斌 胡光锐 殷玲玲 |
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| 作者单位： | 1. 扬州大学,信息工程学院,江苏,扬州,225009
2. 上海交通大学,电子工程系,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目(60172018)，扬州大学科研基金资助项目(KK0413159) |
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| 摘 要： | 对基于空时分组码的差分检测算法和相干检测算法进行了研究与对比.差分检测的鲁棒性很强,而且不需要精确的信道估计,与相干检测相比会存在性能丢失;相干检测可以取得很好的性能,但它需要知道可靠的相位和信道估计.仿真表明:当误码率(BER)相同时,相干检测的信噪比(SNR)要比差分检测的低;当误码率和星座图相同时,相干检测和差分检测的信噪比随发射天线和接收天线数量的增加而降低.
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| 关 键 词： | 空时分组码 差分检测 相干检测 信噪比 差分编码 |
| 文章编号： | 1007-824X（2005）04-0053-04 |
| 收稿时间： | 2005-04-08 |
| 修稿时间： | 2005-04-08 |
Differential detection and coherent detection based on space-time block codes |
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| LI Zheng-quan,WANG Bin,HU Guang-rui,YIN Ling-ling.Differential detection and coherent detection based on space-time block codes[J].Journal of Yangzhou University(Natural Science Edition),2005,8(4):53-56. |
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| Authors: | LI Zheng-quan WANG Bin HU Guang-rui YIN Ling-ling |
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| Abstract: | The differential detection and coherent detection based on space-time block codes and their comparisons are studied.Differential detection is robust and requires no channel estimation,but there is a performance loss compared to coherent one.Coherent detection results in good performance,but it requires phase and/or channel estimation.Simulation results show that the signal-noise ratio(SNR) of coherent detection is lower than that of differential detection when bit error rate(BER) is same.When BER and constellation are same,the SNRs of coherent detection and differential detection decrease with the increase of the number of transmit antennas and receive antennas. |
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| Keywords: | space-time block code differential detection coherent detection signal-noise ratio differential encoding |
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