The Research of Multiple-Symbol Differential Detection in Network Coding
Xinqiang Han, Zhengquan Li, Jin Xiao-ping, Jie Chen · International Conference on Electronics, Communications and Control · 2012
In order to shorten 3dB performance gap between the conventional differential detection and correlation detection in network coding, multiple-symbol differential detection (MSDD) is put forward in two-way relay channel (TWRC) model. However, the complexity of the maximum likelihood differential detection increases exponentially with the detection group length and the modulation constellation points. In order to circumvent this excessive computational complexity, we propose multiple-symbol differential sphere decoding (MSDSD). Simulation results show that the combination of MSDSD and differential network coding can not only reduce the computational complexity, but also overcome error platform caused by High-Doppler frequency at high signal-to-noise ratio, and obtain the optimum detection performance simultaneously. Hence, MSDSD can be regarded as a low complexity detection algorithm in differential network coding scheme.