电子学报 ›› 2022, Vol. 50 ›› Issue (11): 2754-2764.DOI: 10.12263/DZXB.20210839
王玉龙, 吴迪, 胡涛
收稿日期:
2021-07-02
修回日期:
2021-11-04
出版日期:
2022-11-25
作者简介:
WANG Yu-long, WU Di, HU Tao
Received:
2021-07-02
Revised:
2021-11-04
Online:
2022-11-25
Published:
2022-05-16
摘要:
针对空时分组码(Space-Time Block Code,STBC)盲识别中码型相同的编码区分性较差甚至无法区分的问题, 提出了一种基于接收信号统计特征的识别算法.首先分析了多输入多输出(Multiple Input Multiple Output,MIMO)系统中采用的空时编码方案与接收信号的统计特征之间的相关性, 设计了概率匹配与弥散度匹配对该相关性进行量化, 获得接收信号与不同编码方案的匹配度, 最后利用决策树选择匹配度最高的编码作为识别结果.仿真结果表明, 针对两组同型的空时分组码, 所提算法在信噪比为8dB时可达98%以上的识别率, 而基于特征提取的传统算法无法对两组编码进行有效区分;与基于深度学习的算法相比, 本文算法对同型空时码的识别具有更好的鲁棒性, 识别过程使用更少的计算资源.
中图分类号:
王玉龙, 吴迪, 胡涛. 一种同型空时分组码的识别算法[J]. 电子学报, 2022, 50(11): 2754-2764.
WANG Yu-long, WU Di, HU Tao. An Identification Algorithm for Space-Time Block Codes with the Same Shape[J]. Acta Electronica Sinica, 2022, 50(11): 2754-2764.
Code | ||
---|---|---|
OSTBC1(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 | ||
OSTBC2(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 | ||
OSTBC3(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 |
表1 不同延时下||RX,T(τ)||F2的统计结果
Code | ||
---|---|---|
OSTBC1(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 | ||
OSTBC2(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 | ||
OSTBC3(3,4) | 0 | |
1 | ||
2 | ||
3 | ||
>3 |
算法对比 | 加法次数 | 乘法次数 |
---|---|---|
本文算法 | 15N | 5N |
文献[ | 144816N | 145408N |
文献[ | 74336N | 74752N |
表4 不同算法的计算量对比
算法对比 | 加法次数 | 乘法次数 |
---|---|---|
本文算法 | 15N | 5N |
文献[ | 144816N | 145408N |
文献[ | 74336N | 74752N |
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