【摘要】：跳頻通信可以大幅提高通信的抗截獲和抗干擾能力,研究跳頻信號(hào)的偵察接收具有重要的軍事意義。首先,文章分析了跳頻通信雙發(fā)收發(fā)原理以及非合作偵察接收機(jī)工作流程,闡述了跳頻信號(hào)的數(shù)學(xué)表示中對(duì)應(yīng)參數(shù)的物理含義。利用時(shí)頻分析對(duì)跳頻信號(hào)進(jìn)行分析,在時(shí)頻聚集性和運(yùn)算的復(fù)雜度上綜合考量各種時(shí)頻分布的性能,從而得出適用于實(shí)際需求的最佳時(shí)頻分布。其次,分析了常見(jiàn)的三種跳頻信號(hào)偵察接收機(jī),介紹了傳統(tǒng)FFT接收機(jī)結(jié)構(gòu),分析和仿真了基于壓縮感知的跳頻偵察接收機(jī)原理和性能。其中針對(duì)傳統(tǒng)數(shù)字信道化在進(jìn)行實(shí)信號(hào)分路時(shí)出現(xiàn)的信道冗余問(wèn)題提出了一種新型高效實(shí)現(xiàn)方法。再次,文章對(duì)復(fù)雜電磁環(huán)境下的信號(hào)的盲檢測(cè)問(wèn)題和參數(shù)的估計(jì)等問(wèn)題進(jìn)行了闡述,針對(duì)跳頻信號(hào)的頻域稀疏特性,利用數(shù)字信道化的結(jié)果對(duì)信號(hào)的起跳時(shí)刻進(jìn)行估計(jì),并對(duì)跳周期進(jìn)行校準(zhǔn)。利用跳時(shí)估計(jì)結(jié)果,提出針對(duì)跳頻信號(hào)的噪聲基底估計(jì),設(shè)計(jì)了載頻和帶寬估計(jì)算法,并對(duì)各個(gè)算法進(jìn)行性能仿真驗(yàn)證。最后對(duì)跳頻信號(hào)盲解跳接收機(jī)進(jìn)行實(shí)現(xiàn),分析和解決了高速數(shù)據(jù)采集和傳輸?shù)牟环�(wěn)定問(wèn)題�；谶\(yùn)行速度和資源的綜合考慮,設(shè)計(jì)了分時(shí)復(fù)用的濾波器和FFT結(jié)構(gòu),并對(duì)高速解跳器實(shí)現(xiàn)提出了資源優(yōu)化結(jié)構(gòu),給出了最終測(cè)試結(jié)果。
[Abstract]:Frequency hopping communication can greatly improve the ability of anti-interception and anti-jamming. It is of great military significance to study the reconnaissance and reception of frequency-hopping signals. Firstly, this paper analyzes the principle of dual-transceiver in frequency-hopping communication and the work flow of non-cooperative reconnaissance receiver, and expounds the physical meaning of the corresponding parameters in the mathematical representation of frequency-hopping signal. The time-frequency analysis is used to analyze the frequency-hopping signals, and the performance of various time-frequency distributions is synthetically considered in terms of time-frequency aggregation and computational complexity, and the optimal time-frequency distribution suitable for practical requirements is obtained. Secondly, three kinds of frequency-hopping signal reconnaissance receivers are analyzed, the structure of traditional FFT receivers is introduced, and the principle and performance of frequency-hopping reconnaissance receivers based on compressed sensing are analyzed and simulated. In order to solve the problem of channel redundancy caused by traditional digital channelization in real signal splitting, a novel and efficient implementation method is proposed. Thirdly, the problem of blind detection and parameter estimation of signals in complex electromagnetic environment is discussed in this paper. According to the frequency-domain sparse characteristic of frequency-hopping signals, the take-off time of signals is estimated by the result of digital channelization. The jump period is calibrated. Based on the time-hopping estimation results, the noise base estimation of frequency-hopping signals is proposed. Carrier frequency and bandwidth estimation algorithms are designed, and the performance of each algorithm is verified by simulation. Finally, the blind de-hopping receiver of frequency hopping signal is implemented, and the unstable problem of high-speed data acquisition and transmission is analyzed and solved. Based on the comprehensive consideration of running speed and resource, the time-sharing multiplexing filter and FFT structure are designed, and the resource optimization structure for the implementation of high speed de-hopper is proposed, and the final test results are given.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN914.41

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