采用MSK调制的物理层网络编码信号检测  

Detection for Signal of Physical-layer Network Coding with MSK Modulation

作　　者：沙楠[1] 高媛媛[1] 益晓新[1] 杨保峰[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《信号处理》2014年第5期599-605,共7页Journal of Signal Processing

基　　金：国家自然科学基金(60972050);国家重大专项(2010ZX03003-003-01)

摘　　要：针对双向中继信道,提出一种采用最小频移键控(MSK)调制的物理层网络编码(PNC)方案,即MSKPNC。与采用BPSK、QPSK等线性调制技术的物理层网络编码方案相比,MSK-PNC具有更高的频谱效率和功率效率。本文对MSK-PNC方案中的物理层网络编码信号检测进行研究,提出了两种检测方法。第1种方法采用正交解调映射,第2种方法采用最大似然序列检测。分析和仿真结果表明,正交解调映射方案使得MSK-PNC误比特率性能等于QPSK-PNC,最大似然序列检测算法在实现复杂度上相对较高,但是其误比特率性能更优,并且同样适用于检测采用CPFSK调制方式的物理层网络编码信号。A new scheme of physical-layer network coding （PNC） with minimum shift keying （MSK） modulation, i. e. , MSK-PNC, for two-way relay channels was proposed. Compared with the schemes with BPSK, QPSK and other linear mod- ulation methods for PNC, the MSK-PNC scheme had better spectral and power efficiency. In this paper, the signal detec- tion for PNC with MSK modulation was investigated, and two detection methods were proposed. The first one was orthogonal demodulation and mapping （ ODM）, and the second one was maximum-likelihood sequence detection （MLSD）. Numerical and simulation results show that with ODM method, the bit error rate （BER） performance of MSK-PNC is the same as that of QPSK-PNC. Although MLSD algorithm has higher computational complexity, it outperforms ODM method in terms of BER and also can be used for signal detection for PNC with CPFSK modulation.

关 键 词：物理层网络编码 最小频移键控 映射 检测 

分 类 号：TN925[电子电信—通信与信息系统]