直接序列扩频系统抗干扰能力研究

李振东; 谭维凤; 康成斌; 程竟爽

doi:10.11999/JEIT191007

直接序列扩频系统抗干扰能力研究

doi: 10.11999/JEIT191007

1.
中国空间技术研究院通信与导航卫星总体部北京 100094
2.
航天东方红卫星有限公司北京 100094
3.
北京空间飞行器总体设计部北京 100094

详细信息

作者简介:
李振东：男，1983年生，工程师，硕士，研究方向为卫星微波通信、航天器电子与信息系统

谭维凤：女，1984年生，工程师，硕士，研究方向为卫星测控系统、扩频通信

康成斌：男，1983年生，高级工程师，博士，研究方向为卫星星间链路、微波通信

程竟爽：男，1989年生，工程师，博士，研究方向为航天器总体设计

通讯作者:
李振东　lizhendong.2009@163.com

中图分类号: TN911.4
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- 被引次数: 0
出版历程
- 收稿日期: 2019-12-18
- 修回日期: 2020-11-15
- 网络出版日期: 2020-11-19
- 刊出日期: 2021-01-15

Research on Anti-interference Ability of Direct Sequence Spread Spectrum System

1.
Institute of Telecommunication and Navigation Satellite, CAST, Beijing 100094, China
2.
DFH Satellite Co., Ltd., Beijing 100094, China
3.
Beijing Institute of Spacecraft System Engineering, Beijing 100094, China

摘要

摘要:
在进行扩频系统设计时，有时需要分析系统的抗干扰能力，但现有的文献中关于直接序列扩频系统的抗宽带干扰能力、抗部分频带干扰能力说法不一致，提供的误比特率(BER)公式也互相不一致。该文通过理论推导给出了直接序列扩频系统在宽带干扰、部分频带干扰下更具一般意义的误比特率公式，并通过计算机仿真验证了该公式的正确性。最后利用该文给出的公式对直扩系统的性能随干扰频点、干扰带宽的变化趋势做了分析。
- 直接序列扩频 /
- 抗干扰 /
- 误比特率 /
- 误码率
Abstract:
When designing a spread spectrum system, it is sometimes necessary to analyze the anti-interference ability of the system. However, the existing literature on the anti-wideband interference capability and the ability to resist partial frequency band interference of the Direct Sequence Spread Spectrum (DSSS) system are different, and the Bit Error Rate (BER) formulas provided are different, the general BER formula of direct sequence spread spectrum system under wideband interference and partial frequency band interference is given by theoretical derivation. The correctness of the formula is verified by computer simulation. Finally, the performance of the DSSS system with the interference frequency and the interference bandwidth is analyzed using the formula given in this paper.
- Direct Sequence Spread Spectrum (DSSS) /
- Anti-interference /
- Bit Error Rate (BER) /
- Symbol error rate

HTML全文

图 1 直接序列扩频发射系统

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图 2 直接序列扩频接收系统

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图 3 宽带干扰示意图

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图 4 伪随机序列的功率谱

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图 5 部分频带干扰示意图

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图 6 J(f)与${S_{{{\rm{c}}_{\rm{r}}}}}\left( f \right)$卷积过程示意图

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图 7 J(f)与${S_{{c_r}}}\left( f \right)$卷积结果示意图

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图 8 宽带干扰仿真结果

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图 9 部分频带干扰仿真结果

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图 10 不同干扰频点对应的误比特率

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图 11 不同干扰带宽对应的误比特率

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