基于信噪比优选的电力线载波和无线通信物理层融合方法

A PLC and Wireless Dual-mode Communication Physical Layer Integration Method Based on SNR Estimation

传统的电力线载波和无线融合通信方法采用2个独立的物理层,存在集成度不高和上层融合协议复杂的缺点,文章提出一种基于信噪比优选的电力线载波和无线通信物理层融合方法。首先建立电力线载波和无线物理层融合的模型,然后提出基于信噪比优选的载波和无线物理层融合方法,该方法将载波和无线采用统一的OFDM基带信号体制,接收端对2路接收信号进行同步检测和信噪比估计,优选信噪比高的一路进行数字解调,从而真正实现物理层的融合;最后建立融合通信的信道和系统仿真模型,利用Matlab软件对物理层融合方法进行仿真验证。仿真结果表明,文章的方法能够有效降低通信误码率,提升融合通信的性能。

Aiming at the low integration level and high-layer protocol complexity of traditional PLC wireless integration method, this paper proposes a PLC wireless dual-mode communication physical layer integration method based on SNR estimation. Firstly, the physical layer integration model is established. Then a physical layer integration method of PLC wireless based on SNR estimation is proposed. This method uses a unifi ed OFDM baseband signal system, the receiver does frame detection and SNR estimation for two signals at the same time, and selects the signal with higher SNR for digital demodulation, so as to achieve real physical layer integration. Then the system simulation model is established based on Matlab software. The simulation results show that the proposed method can effectively reduce the bit error rate and improve the performance of the integration communication.