摘要
为同时改善不对称的随机极性甚小幅相(ARP-VMAP)调制信号的频谱利用率和能量利用率,提出了一种多元位置3值VMAP调制方式,设计了基于BP神经网络或支持向量机解调器的接收机。对比和分析了ARP-VMAP调制、3值VMAP调制、多元位置ARP-VMAP调制和多元位置3值VMAP调制信号的功率谱特性、60 dB带宽、频谱利用率和解调性能。仿真结果表明,新的调制方式不仅提高了频谱利用率,而且显著改善了解调性能。
In order to improve the spectral efficiency and energy efficiency of asymmetry, random-polar and very mini- mum amplitude and phase （ARP-VMAP） modulated signal simultaneously, an M-ary position and three-valued VMAP modulation was presented, and the receiver based on BP neural network or support vector machine demodulator was also designed. The contrast and analysis of the power spectrum, the -60 dB bandwidth, the spectral efficiency, and the de- modulation performance among modulations as the ARP-VMAP, the three-valued VMAP, the M-ary position ARP-VMAP, and the M-ary position and three-valued VMAP, were carried out. Simulation results show that the new modem not only raise spectral efficiency, but also improve demodulation performance significantly.
出处
《通信学报》
EI
CSCD
北大核心
2013年第8期177-184,共8页
Journal on Communications
基金
国家自然科学基金资助项目(61271204)
中兴通讯产学研基金资助项目(8504000171)~~
关键词
不对称的随机极性甚小幅相调制
频谱利用率
能量利用率
BP神经网络
支持向量机
asymmetry, random-polar and very minimum amplitude and phase modulation
spectral efficiency
energyefficiency
BP neural network
support vector machine
