WSNs中一种新的编码协作通信方式

A new coding cooperative communication scheme in WSNs

采用空间分集的方法可以有效地对抗无线信道中的衰落,由于受到体积、重量、成本等因素的限制,在无线传感器网络(W SNs)节点上实现多天线技术较为困难。在W SNs中提出了一种基于π旋转LD-PC码的编码协作通信方式,2个单天线节点通过共享自己的天线,形成了一个虚拟的多天线系统。LDPC码的不同部分通过不同节点的上行链路传输到基站,获得发送分集增益。在相同的系统带宽和发送功率下,与非协作通信方式相比,该编码协作方式可显著提高系统性能。

Spatial diversity is an effect method to resist fading effect in wireless channel. Due to the limitation of size,weight and cost,it is difficult to use the multi-antenna technique on the node of wireless sensor networks. A novel coding cooperative communication scheme based on π rotation LDPC codes in WSNs is presented. A virtual muhi-antenna system was created by two nodes share their own single antenna. Different parts of LDPC code were transmitted to the base station through different nodes＇ uplink channels to obtain diversity gain, the system performance can be improved effectively in the same system bandwidth and transmitting power.