吉林大学学报(工学版) ›› 2020, Vol. 50 ›› Issue (5): 1870-1875.doi: 10.13229/j.cnki.jdxbgxb20190558

• 通信与控制工程 • 上一篇    

一种基于跳频的散射通信新方法与仿真分析

沈斌松1(),秦建存2(),任文成1   

  1. 1.中国电子科技集团公司 第五十四研究所, 石家庄 050081
    2.中电网络通信集团有限公司, 石家庄 050081
  • 收稿日期:2019-06-03 出版日期:2020-09-01 发布日期:2020-09-16
  • 通讯作者: 秦建存 E-mail:93349647@qq.com;13903116377@139.com
  • 作者简介:沈斌松（1982-），男，高级工程师，博士研究生.研究方向：散射通信技术，宽带无线通信技术.E-mail:93349647@qq.com
  • 基金资助:
    国家自然科学基金项目(61504124)

A new method of troposcatter communication based on frequency hopping and simulation analysis

Bin-song SHEN1(),Jian-cun QIN2(),Wen-cheng REN1   

  1. 1.The 54th Research Institute of CETC, Shijiazhuang 050081, China
    2.CETC Network & Communications Group Co. , Ltd. , Shijiazhuang 050081, China
  • Received:2019-06-03 Online:2020-09-01 Published:2020-09-16
  • Contact: Jian-cun QIN E-mail:93349647@qq.com;13903116377@139.com

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摘要：

针对对流层散射通信信道多径衰落特性，提出一种基于跳频的抗衰落方法，通过建立基于跳频的散射通信模型，对该方法在衰落信道下的性能进行理论分析，并给出其接收信号基带处理算法流程，采用基于跳频帧结构的帧粗同步及基于信道响应搜索的帧细同步算法，解决衰落信道下的帧同步问题，采用基于信道去噪估计与混叠抽取的频域均衡算法，有效克服信道多径，并抑制噪声放大。仿真结果验证了该方法性能理论分析的正确性以及有效性。

关键词: 散射通信, 跳频, 抗衰落, 帧同步, 信道均衡

Abstract:

In this paper, a novel anti-fading method based on frequency hopping is proposed to solve the problem of multipath fading characteristics of troposcatter communication channels. The troposcatter communication model based on frequency hopping is established and the performance of this method is theoretically analyzed in fading channel. The algorithm flow of its received baseband signal processing is given. The frame coarse synchronization algorithm based on frequency hopping frame structure and the frame fine synchronization algorithm based on channel response search are adopted to solve frame synchronization problem in fading channel. The frequency domain equalization algorithm based on channel de-noising estimation and aliasing extraction is adopted to overcome channel multipath effectively and suppress noise amplification. Simulation results verify the validity and effectiveness of the proposed method.

Key words: troposcatter communication, frequency hopping, anti-fading, frame synchronization, channel equalization

中图分类号: 

  • TN926

图1

基于跳频的散射通信系统模型"

表1

不同散射通信体制特点对比表"

分集方式性能设备复杂度算法复杂度缺点
空间最优复杂复杂设备复杂
跳频良好简单简单无
频率良好简单复杂峰均比高、有交调
时间良好简单复杂大时延
角分集优复杂复杂设备复杂

图2

跳频散射通信接收信号基带处理流程"

表2

跳频数据帧结构"

帧内容长度帧内容长度
GAP36SERV12
RU4DATA816
PILOT32PILOT32
CTRL64RD4

图3

相关峰对齐过程"

图4

帧细同步调整前后时域冲激响应示意图"

图5

信道估计算法流程"

图6

AWGN信道修正前、后的频域响应"

图7

抗衰落方法性能仿真模型"

图8

解调星座图"

图9

抗衰落方法误码性能曲线"

图10

不同多径下抗衰落方法误码性能曲线"

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