60GHz无线通信系统在PPM调制下的信道容量分析

On Capacity of 60 GHz Wireless Communications System with Pulse Position Modulation Abstract

本文主要研究60GHz无线通信系统在高斯信道下的香农信道容量及在脉冲位置调制(MPPM)下的信道容量。理论分析与推导得到香农信道容量与传输距离的关系函数,由MPPM调制原理及高斯信道的数学模型推导系统在MPPM调制下信道容量与信噪比、信道容量与通信距离间的函数关系,利用Matlab仿真,得到不同条件下的关系曲线。研究结果表明,60GHz无线通信系统在高斯信道下的信道容量是通信距离和信噪比的函数,该系统更适合于短距离无线通信。高进制的PPM调制能够显著的提高系统数据传输速率,当数据率相同时,高进制调制的PPM能够提供的可靠通信距离更远。

This paper mainly investigates the capacity of 60GHz wireless communications over AWGN channels,including the Shannon capacity and channel capacity with M-ary pulse position modulation（MPPM）.Firstly,the function of the relationship between Shannon capacity and transmission distance is derived by theoretical analysis.Using the principle of MPPM and the mathematical model system of AWGN,the relationship between the capacity with PPM and the signal to noise ratio（SNR） could be gotten and the relationship between the capacity and the communication distance could be gotten too.Secondly,the paper simulates the research results using Matlab.The function relationship curves are obtained.The result shows that,the capacity of 60GHz wireless communication over AWGN channels is a function of communication distance and signal to noise ratio and the system is suitable for short distance communication.When choose the high ary PPM,the system data transfer rate will be improved.When the transfer rate is unchanged,the high ary PPM can provide farther reliable communication distance.