| 摘要: |
| 目前差分跳频系统的性能研究主要集中在无衰落信道和Rayleigh衰落信道，但短波信
道是一种典型的多径衰落信道，采用Nakagami-m信道衰落模型能够更好地描述短波信道
的特
性。研究了Nakagami-m衰落信道下序列检测线性合并差分跳频接收机的误符号性能，给
出了
误符号率的闭式表达式，并证明了在m=1时所得结果与已有的瑞利衰落信道下接收机性
能研
究结果的一致性。仿真结果表明：当信道衰落程度逐渐降低时，差分跳频接收机误符号性能
逐渐提高，并最终达到无衰落AWGN信道下的误符号性能。 |
| 关键词: 差分跳频 Nakagami-m衰落 序列检测 线性合并 矩生成
函数 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目(60901069) |
|
| Performance Analysis of Differential Frequency Hopping Receiver over Nakagami-m Fading Channel |
| QU Xiao-xu,LOU Jing-yi,HU Ling |
| (College of Electronic Engineering, Naval University of Engineering, Wuhan 43
0033,China;Unit 75753 of PLA,Guangzhou 410073, China) |
| Abstract: |
| Performance of differential frequency hopping(DFH) receiver over non-f
ading and Rayleigh fading channel has been studied nowadays, yet shortwave commu
nication channel is a typical multi-path fading channel and Nakagami-m chann
el f
ading model can represent the characteristics of shortwave channel more exactly.
Performance of DFH receiver applying sequence detection and linear combination
over Nakagami-m fading channel is studied. A closed-form symbol error rate(
SER)
expression is given and the consistency for the special case of m=1 with
the
reported result of the SER over Rayleigh fading channel is proved. Simulation re
sults show that with the decrease of channel fading extent SER performance of DF
H receiver increases gradually and approaches the performance of non-fading AWGN
channel as expected. |
| Key words: differential frequency hopping Nakagami-m fading sequence detection linear combing moment generating function |
《电讯技术》编辑部 