联合信道网络编码研究综述

网络编码技术可以提高网络吞吐量和传输性能,均衡网络负载。在无线传感器网络中,应用网络编码和信道编码联合编码技术可以降低节点数据处理复杂度,大幅提升系统整体性能。基于传统网络编码模型,在节点中加入数据调制功能,可以实现网络编码和信道编码的联合编码,信道编码则采用各方面性能较好的Turbo码和LDPC码。结果表明,在10-4误码率下,联合编码方案的信噪比相比于传统编码方案有1.5 dB的节省。

Review of Joint Coding of Channel Coding and Network Coding

Network coding technology can not only improve the throughput and transmission efficiency of the network system, but also make the load more balanced. By employing the joint coding of network coding and channel coding in the Wireless Sensor Network, it can reduce the complexity of data processing in the node and hugely promote the performance of the whole system. Based on the traditional netwok coding model, joint coding can be realized by employing the modulation in the node. Turbo codes and LDPC codes are among those best performing codes and they have some unique advantages so are preferred in the system. The result shows that under the same circumstance of bit error rate 10-4, the signal to noise ratio can be saved by 1.5dB.