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.
出处
《电波科学学报》
EI
CSCD
北大核心
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)
作者简介
联系人:靳一 E—mail:john.0216@163.com.靳一(1984-),男,河南人,东南大学信息科学与工程学院在读博士,主要研究方向为通信信号处理.
吴乐南(1952-),男,安徽人,东南大学信息科学与工程学院教授、博士生导师,电子学会会士,通信学会高级会员,计算机学会高级会员,研究方向为通信信号处理和多媒体信息处理.
何峰(1972-),男,陕西人,东南大学信息科学与工程学院讲师,研究方向为通信中的信号处理.