基于非正交波形的超奈奎斯特采样  

A novel faster-than-Nyquist signaling based on non-orthogonal waveform

作　　者：马冰[1] 白勇[2] Ma Bing;Bai Yong(Hainan Vocational College of Political Science and Law,Haikou 571100,China;School of Information and Communication Engineering,Hainan University,Haikou 570228,China)

机构地区：[1]海南政法职业学院,海南海口571100 [2]海南大学信息与通信工程学院,海南海口570228

出　　处：《电子技术应用》2021年第10期73-76,81,共5页Application of Electronic Technique

基　　金：国家自然科学基金项目(61561017);海南省高等学校教育教学改革研究项目(Hnjg2018-96)。

摘　　要：针对超奈奎斯特(Faster-than-Nyquist,FTN)系统,提出了基于非正交波形编码的超奈奎斯特采样,并与传统的正交波形FTN和传统的正交Nyquist系统进行了对比分析。在99.99%的功率带宽和5次迭代检测译码的条件下,仿真结果表明:相比于升余弦的正交波形FTN系统,基于高斯和扩展高斯(Extended Gaussian Functions,EGF)脉冲成形的非正交波形FTN系统可以获得4.4 dB的成形增益,同时由于良好的时频聚焦特性,其均衡复杂度只是升余弦的1/16。For the faster-than-Nyquist(FTN)system,a joint convolutional coded modulation scheme with non-orthogonal shaping pulses,Gaussian pulse and extended Gaussian functions(EGF),is proposed and compared with the traditional FTN with the orthogonal waveform and the traditional orthogonal Nyquist systems.On the condition of approximate equivalent 99.99%power bandwidth and 5 iterations,the simulation results show that compared with the FTN system based on the raised cosine pulse,the FTN systems with EGF and Gaussian pulse can get 4.4 dB shaping gain and have only one sixteenth equalization complexity due to good time-frequency gathering feature.

关 键 词：超奈奎斯特 奈奎斯特 脉冲成形 波形 非正交 

分 类 号：TN911.3[电子电信—通信与信息系统]