多元位置3值连续相位调制解调方法  

Modulation & demodulation method for M-ary position and three-valued continuous phase

作　　者：靳一[1] 吴乐南[1] 何峰[1] 余静[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《电波科学学报》2013年第4期641-647,655,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.61271204);中兴通讯产学研资助项目(No.8504000171)

摘　　要：为进一步改善多元位置随机极性改进的连续相位扩展二元相移键控(Modified Extend Binary Phase Shift Keying with Continuous Phase,MCP-EBPSK)调制信号的频谱利用率,充分利用相位调制的位置和极性来携带多进制信息,提出了多元位置的3值MCP-EBPSK调制。阐述了多元位置3值MCP-EBSPK调制原理和基于(Back Propagation,BP)神经网络/支持向量机多分类器的解调器模型,对比和分析了随机极性MCP-EBPSK调制、3值MCP-EBPSK调制,以及多元位置随机极性MCP-EBPSK调制、多元位置3值MCP-EBPSK调制的功率谱、-60dB带宽、频谱利用率和解调性能.仿真结果表明:在保持功率谱结构不变的前提下,新的调制方式不仅提升了码率和频谱利用率,且解调性能更佳.In order to improve the spectral efficiency ot M-ary posmon and random-polar modified extended binary phase shift keying with continuous phase （MCP-EB-PSK） modulation further, both the position and polarity of phase changes are used to carry M-ary information, then an M-ary modulation is proposed. The principle of M position and three-valued MCP-EBPSK ary position and three-valued MCP-EB-PSK is demonstrated, and the demodulator model based on multi-classifier as BP neural network, and support vector machine is also given. Comparisons and analy-sis on power spectrum, the -60 dB bandwidth, the spectral efficiency, and demod-ulation performance among the random-polar MCP-EBPSK, the three-valued MCP-EBPSK, the M-ary position and random-polar MCP-EBPSK, and the M-ary poison and three-valued MCP-EBPSK, are implemented. Simulation results show that on the premise of remaining same power spectrum structure, the new modulation method not only multiplies the bit rate and spectral efficiency, but also has better demodulation performance.

关 键 词：改进的连续相位扩展二元相移键控(MCP—EBPSK) 频谱利用率 BP神经 网络 支持向量机 功率谱 

分 类 号：TN919.6[电子电信—通信与信息系统]