脈間Costas跳頻脈內(nèi)多載波混沌相位編碼雷達(dá)信號設(shè)計與分析

黃瓊丹; 李勇; 盧光躍

doi:10.11999/JEIT140653

脈間Costas跳頻脈內(nèi)多載波混沌相位編碼雷達(dá)信號設(shè)計與分析

doi: 10.11999/JEIT140653 cstr: 32379.14.JEIT140653

1.
(西北工業(yè)大學(xué)電子信息學(xué)院西安 710072)
3.
(西安郵電大學(xué)通信與信息工程學(xué)院西安 710112)

基金項目:

航空科學(xué)基金(20112053018)資助課題

計量
- 文章訪問數(shù): 2071
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出版歷程
- 收稿日期: 2014-05-19
- 修回日期: 2015-01-29
- 刊出日期: 2015-06-19

Design and Analysis of Inter-pulse Costas Frequency Hopping and Intra-pulse Multi-carrier Chaotic Phase Coded Radar Signal

1.
(School of Electronics and Information, Northwestern Polytechnical University, Xi&rsquo
2.
(School of Electronics and Information, Northwestern Polytechnical University, Xi&rsquo
3.
(School of Telecommunication and Information Engineering, Xi&rsquo

摘要

摘要: 該文在步進(jìn)頻信號的基礎(chǔ)上，把基于混沌調(diào)制的多載波相位編碼(Multi-Carrier Phase Coded, MCPC)信號作為子脈沖，用Costas跳頻代替頻率的線性步進(jìn)，設(shè)計出脈間Costas跳頻脈內(nèi)多載波混沌相位編碼(Inter-Pulse Costas frequency hopping and intra-pulse Multi-Carrier Chaotic Phase Coded, IPC-MCCPC)雷達(dá)信號，并對其模糊函數(shù)及自相關(guān)性能進(jìn)行了研究。仿真分析表明，該文設(shè)計的信號繼承了步進(jìn)頻信號用較小的瞬時帶寬合成較大的工作帶寬的優(yōu)點，同時有效克服了步進(jìn)頻信號存在的距離-速度耦合的缺點。脈內(nèi)多載波特性使得這種信號在保持總帶寬和步進(jìn)頻信號相等的條件下減少跳頻階數(shù)，從而提高信號處理的數(shù)據(jù)率；混沌調(diào)相的引入使得這種信號具有更強的保密性；脈間頻率的隨機跳變使其模糊函數(shù)具有更低的周期性旁瓣。這種信號眾多的參數(shù)、靈活的結(jié)構(gòu)及較大的調(diào)制復(fù)雜度，增加了偵察接收機匹配和識別的難度，從而提高雷達(dá)的反截獲性能。
- 雷達(dá) /
- 混沌 /
- Costas /
- 多載波相位編碼 /
- 模糊函數(shù)
Abstract: Through taking the Multi-Carrier Phase Coded (MCPC) signal as the subpulse, and replacing the linear frequency step with the Costas frequency hopping, a new Inter-Pulse Costas frequency hopping and intra-pulse Multi-Carrier Chaotic Phase Coded (denoted by IPC-MCCPC) radar signal is designed on the basis of stepped-frequency signal. The ambiguity function and autocorrelation performance of the designed signal are studied. Simulation results show that the designed signal carries forward the advantage that the stepped-frequency signal achieves a larger operating bandwidth by instantaneous bandwidth synthesis, and overcomes the defect of range-velocity coupling caused by frequency-stepped. The interpulses multi-carrier characteristic can decrease the frequency stepped pulse number under the condition of keeping the total bandwidth as same as the stepped-frequency signal, thus increases the data rate of signal processing. The designed signal has stronger secrecy due to the introduction of chaotic phase modulation. The ambiguity function of designed signal has lower periodic side lobe because the Costas frequency hopping. Besides that, the designed signal has flexible structure, numerous parameters and complex modulation mode makes it more difficult to be identified by reconnaissance receivers, so the anti-intercept ability of radar system is greatly improved.
- Radar /
- Chaotic /
- Costas /
- Multi-Carrier Phase Coded (MCPC) /
- Ambiguity function

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