一种高速跳频信号的数字信道化宽带接收设计
2021年电子技术应用第12期
王 杰
中国西南电子技术研究所，四川 成都610036
摘要： 跳频通信作为一种新型的通信体制，具有很强的抗截获、抗搜索、抗干扰、抗对抗等特点。美国及北约国家装备的战术信息分发系统以及地面、舰载、机载跳频电台和敌我识别系统等，均采用了跳频通信体制，具有高度的保密性和抗干扰性能。针对高速跳频信号频带宽、频点多且跳频速度快不利于快速检测的特点，提出了利用两片ADRV9009射频捷变芯片将高速跳频信号变换成零中频信号后，送FPGA经多相滤波数字信道化后完成多路通道信号接收处理的方案。该设计不仅简化了整个高速跳频信号前端宽带接收处理的流程，减小了前端模拟信道接收设备的体积，降低了系统的功耗，同时基于FPGA实现多相滤波的数字信道化设计大大增加了系统的灵活性，提高了后端高速跳频信号的检测和识别概率。
中圖分類號(hào)： TN393
文獻(xiàn)標(biāo)識(shí)碼： A
DOI：10.16157/j.issn.0258-7998.212183
中文引用格式： 王杰. 一種高速跳頻信號(hào)的數(shù)字信道化寬帶接收設(shè)計(jì)[J].電子技術(shù)應(yīng)用，2021，47(12)：26-30,
英文引用格式： Wang Jie. Design of digital channelized broadband receiver for high speed frequency hopping signal[J]. Application of Electronic Technique，2021，47(12)：26-30,
文獻(xiàn)標(biāo)識(shí)碼： A
DOI：10.16157/j.issn.0258-7998.212183
中文引用格式： 王杰. 一種高速跳頻信號(hào)的數(shù)字信道化寬帶接收設(shè)計(jì)[J].電子技術(shù)應(yīng)用，2021，47(12)：26-30,
英文引用格式： Wang Jie. Design of digital channelized broadband receiver for high speed frequency hopping signal[J]. Application of Electronic Technique，2021，47(12)：26-30,
Design of digital channelized broadband receiver for high speed frequency hopping signal
Wang Jie
Southwest China Institute of Electronic Tecnology，Chengdu 610036，China
Abstract： As a new type of communication system，FH communication has strong characteristics of anti-interception,anti-search,ant-interference and anti-antagonism. FH communication system is adopted in the tactical information distribution system,ground and shipborne and airborne FH radio stations and identification friend or Foe systems of the United states and NATO countries,which has high confidentiality and anti-interference performance.In view of the characteristics of high speed FH signal with wide frequency band,many frequency points and fast frequency hopping speed,this paper proposes to use two pieces of ADRV9009 RF agility chip to transform the high speed FH signal into zero IF signal,and then send it to PFGA through polyphase filtering digital channelization to complete the signal receiving and processing.The design not only simplifies the whole signal front-end wideband reception process,reduces the volume of the front-end analog channel receiving equipment,and reduces the power consumption of the system,but also greatly increases the flexibility of the syetem,and improves the detection and identification probability of high-speed frequency hopping signal in the end.
Key words : high speed FH signal；wideband digital receiver；ADRV9009l；poly-phase filtering process
0 引言
通信偵察的主要任務(wù)是利用電子情報(bào)偵察手段對(duì)敵方發(fā)射的輻射源信號(hào)進(jìn)行搜索與截獲、分選與識(shí)別、調(diào)制參數(shù)測(cè)量和解調(diào)譯碼等。當(dāng)前美國(guó)及北約國(guó)家的數(shù)據(jù)鏈均采用了高速跳頻和直接序列擴(kuò)頻體制[1]，其具有跳頻速度快、頻點(diǎn)多、帶寬寬、擴(kuò)頻碼復(fù)雜等特點(diǎn)，信號(hào)的捕獲、跟蹤和檢測(cè)極為困難[2]。
針對(duì)信號(hào)的捕獲跟蹤，傳統(tǒng)的偵察方式為將接收的射頻信號(hào)通過模擬下變頻變換到中頻信號(hào)，經(jīng)過AD數(shù)字采樣后送數(shù)字信號(hào)處理模塊完成信號(hào)的頻譜計(jì)算和功率估算等，從而完成信號(hào)的檢測(cè)和分選識(shí)別。該方法針對(duì)帶寬小、跳速慢、頻點(diǎn)少的信號(hào)效果較好，但針對(duì)跳頻帶寬、頻點(diǎn)多的信號(hào)則處理能力不足，F(xiàn)PGA的資源無法滿足多路信號(hào)同時(shí)下變頻、濾波和頻譜并行計(jì)算處理。此外，當(dāng)前裝備發(fā)展的趨勢(shì)是低功耗、小型化方向發(fā)展，傳統(tǒng)模擬下變頻方式已經(jīng)很難滿足這方面的需求。
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作者信息：
王 杰
(中國(guó)西南電子技術(shù)研究所，四川 成都610036)
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