摘要
高速移动数据传输时 ,由高速移动而产生的衰落以及多径波的干扰 ,传输特性及差错率特性恶化 ,相移时频调制正是为了对抗衰落与多径延迟而产生。建立了π-TFSK时频调制的数学模型及其复数包络模型 ,在π-TFSK信号的复包络自相关函数的基础上计算了π-TFSK信号的功率谱密度 。
The data error and transmission properties will deteriorate in a high speed mobile data transmission channel because of the signal fading and the interference of multi\|channel waves. Time frequency shift keying (TFSK) modulation is presented to improve the mobile channel property. This paper presents a novel model of TFSK, π TFSK. The mathematical model of π TFSK signal and its auto\|correlation function are presented. The spectral density of the TFSK signal has also been calculated in great detail. In comparison with the well known MSK and DPFSK models, this model exhibits a unique performance.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2002年第2期187-189,共3页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金资助项目 (编号 :BA 964 2 0 70 3 )
江西省测控中心基金资助项目 (编号 2 0 0 10 19)
