多元位置随机极性CP-EBPSK调制解调器研究  

Research on M-ary CP-EBPSK Modem with Random-polar

作　　者：靳一[1] 吴乐南[1] 余静[1] 应鹏魁[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《信号处理》2013年第1期10-16,共7页Journal of Signal Processing

基　　金：国家自然科学基金项目"不对称二元调制信号的增强"(60872075)资助

摘　　要：为改善随机极性的连续相位扩展二元相移键控(Extended Binary Phase Shift Keying with Continuous Phase,CP-EBPSK)调制信号的频谱利用率,提出了一种多元位置随机极性CP-EBPSK调制方式。阐述了多元位置随机极性CP-EBPSK调制原理。在数字冲击滤波器的基础上,分别给出了基于多路判决方式、贪婪判决方式和合理判决方式的解调器,并通过仿真对比和分析了CP-EBPSK调制、随机极性CP-EBPSK调制和多元位置随机极性CP-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:1)在频谱结构不变的条件下,新的调制方式可使信息传输速率和频谱利用率成倍提高;2)若以bps/Hz/SNR(dB)为综合指标,CP-EBPSK系统为1.18*10-3,随机极性CP-EBPSK系统为7.01,而新的调制解调系统为13.8。In order to improve the spectrum efficiency of random-polar modulated Extended Binary Phase Shift Keying with Continuous Phase （CP-EBPSK） , a random-polar and M-ary CP-EBPSK modulation is proposed. The modulation principle of random-polar and M-ary CP-EBPSK is demonstrated. Based on the digital impacting filter, the demodulator on the basis of Multi-path decision method, greedy decision method and rational decision method is presented, respectively. The contrast and analysis of the power spectrum, the -60dB bandwidth, the spectral efficiency, and the demodulation perform- ance among the CP-EBPSK, random-polar modulated CP-EBPSK, and the proposed modulation, are carried out. Simulation results show that ： 1 ） under the premise of remaining the same spectral structure, the proposed modulation method can multiple the information transmission rate and spectral efficiency; 2） if taking bps/Hz/SNR（dB） as comprehensive indicator, CP-EBPSK is about 1.18 ＊ 10-3 , random-polar modulated CP-EBPSK is about 7.01, and the proposed modem is 13.8.

关 键 词：连续相位扩展二元相移键控调制 频谱利用率 数字冲击滤波器 多路判决 贪婪判决 合理判决 

分 类 号：TN911.2[电子电信—通信与信息系统]