中文摘要：

针对恶劣的电力线通信信道环境,研究适合于该信道传输的调制与解调方式是电力线通信的研究热点之一。提出了一种基于整形偏移正交偏移键控（SOQPSK）的调制解调方案。在详细介绍SOQPSK调制技术原理和特点的基础上,分析了SOQPSK调制技术的频谱特性及其在电力线通信中的优势,并利用MATLAB软件和常用的FSK、QPSK、DPSK进行对比仿真,仿真结果表明SOQPSK调制技术在相同误码率下,信噪比要比FSK、QPSK、DPSK提高3-5d B,且具有良好的频谱效率、功率效率和抗非线性特性,在未来的电力线通信系统中具有较好的应用价值。

英文摘要：

Aim to the bad channel environment of the power line communication,it is important to study the modulation and demodulation that suit for the PLC channel. This paper puts forward a kind of modulation scheme based on Shaped Offset Quadrature Phase Shift Keying（ SOQPSK）. In detail SOQPSK modulation technology on the basis of the principle and characteristics,analyzes the spectrum characteristics of SOQPSK modulation technology and it＇s advantages in power line communication. By MATLAB simulation compares the performance with the commonly used FSK、QPSK、DPSK,the result show that the SNR of the SOQPSK improve 3- 5d B than FSK、QPSK、DPSK under the same BER,and SOQPSK has a good spectrum efficiency 、power efficiency and resistance to nonlinear characteristic,in the future PLC system has a good application value.