摘要
提出了多载波频率分集扩频码分多址系统 ( FD/ SSMA)的基本原理 ,并给出了该系统的主要特点 .分析表明 :FD/ SSMA系统具有包括低功率谱密度 ,多址、抗干扰及抗多径能力等特点 ;FD/ SSMA系统的发送和接收均可用离散傅立叶变换实现 ;FD/ SSMA系统具有灵活性 ;FD/
This paper introduces the basic principle and features of the FD/ SSMA ( Frequency Diversity/ Spread Spectrum Multiple Access) system.Itis shown thatthe FD/ SSMA system has the properties of such as low power spectral spectrum,ability to com- municate in the circumstance where exists multi-users,high jamming and multipath.The modulation and demodulation can be implemented by the DFT( Discrete Fourier Transform) in the FD/ SSMA system and the FD/ SSMA system becomes flexible in trans- forming to FH system.The synchronization to PN( pseudo random) code is notincluded in FD/ SSMA system.
基金
山东省自然科学基金资助项目
