Research On The Technology Of Integrated Electronic Systems

In the modern information warfare, integrating communication reconnaissancesystems into radar reconnaissance systems and integrating communication jammingsystems into radar jamming systems are within the technical areas of integratedelectronic systems. Although constrained by the physical weight and volume, anintegrated electronic system can be reconfigured by itself and adapt itself for newtactical missions, which shows the advantages of integrated electronic systems. Thisthesis mainly researches on the key integration technologies of a designedintegrated electronic system.Firstly, several radars and communication systems of interest are selected asthe main researching subjects. An integrated electronic system is proposed afteranalyzing the characteristics of the subjects, as well as the differences betweencommunication and radar reconnaissance systems and the differences between theirjamming systems.Secondly, a communication confrontation against a certain tactical data link forcommunication is discussed. After analyzing the anti-jamming performance of thecommunication system, chirp signal jamming patterns and multi-tone jammingpatterns are proposed, which can achieve good jamming effect with optimizedjamming power allocation. To increase the BER (Bit Error Rate) upon0.1, the SNR(Signal Noise Rate) the communication system can tolerate is down to-20dB,however the SJR (Signal Jamming Rate) from chirp signal jamming patterns isaround-8dB and the SJR from multi-tone jamming patterns is around-10dB. Toachieve a better effect, the jamming frequency of multi-tone jamming patterns isexpected to be0.25MHz or1.25MHz offset from the communication frequency andthe number of jamming frequencies is expected to be around10.Then, a radar confrontation against a certain radar system is discussed. Afteranalyzing the principle of LFM pulse compression, frequency-shifting and repeatjamming patterns and intermittent sampling repeat jamming patterns, which areboth based on DRFM (Digital Radio Frequency Memory), are proposed. Thecombining patterns with these two types of jamming patterns can achieve goodjamming effect with weak-identifiable characteristics and unlimited number of false subjects, which distributed around the protected real subject.At last, a blind source separation problem for mixed signals is discussed. Ablind source separation approach based on FastICA (Fast Independent ComponentAnalysis) algorithm is proposed. Experimental results show that this approach canseparate the communication and radar mixed signals properly and the probability ofthe convergence of the proposed algorithm is about92.3%. A signal recognitionbased on spectral skewness is proposed and proved to be effective. On this basis, acomprehensive simulation about the proposed integrated electronic system is run,which proves the rationality and feasibility of the proposed integrated electronicsystem.