具有舰艇“声纹”标志的水中目标敌我识别方法  

An Underwater Target Identification Friend or Foe Method Based on Voiceprint Marker of Ship

作　　者：王海燕[1] 申晓红[1] 相敬林[1] 姜喆[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《兵工学报》2010年第9期1157-1163,共7页Acta Armamentarii

摘　　要：为了在海战中提高水中兵器敌我识别(IFF)的能力,提出了一种具有舰艇"声纹"标志的水中目标IFF方法。该方法将约定的秘密信息进行纠错编码后,采用混沌序列跳频(FH)图案的快FH技术,以实现第1级信息隐匿;以舰艇噪声的主要频带选取FH的工作频带,FH信号不但将舰艇噪声作为其掩护信息,而且其频谱在较短的时间内为线谱,以实现第2级信息隐匿,形成"声纹"标志。在作战所需的时空范围内,依据该"声纹"标志识别我方目标。仿真分析表明:在多径及强舰艇噪声为干扰的背景下,当SIR=-10dB,SNR>-4dB时,该方法对FH信号的误比特率小于10-6,3km距离的水库试验结果为均能正确IFF.该IFF方法不但简单灵活、识别速度快、准确性高,而且还具有隐蔽性好、抗截获能力强的特点。In order to improve the identification friend or foe（IFF）ability of underwater weapon,an underwater target IFF method based on voiceprint marker of ship was proposed.It codes the error correction for appointed secret information and uses fast chaotic frequency hopping（FH）to take the information hiding of first stage.It also selects the working frequency band within the range of main frequency band of ship-radiated noise.The spectrum of FH signal is linear in a short time.The ship-radiated noise can be regarded as the cover-information of FH signal to take the information hiding of second stage,which forms a voiceprint marker of ship.Friend will be identified according to the voiceprint marker of ship.The simulation results show that in the background of strong ship radiated noise and underwater acoustic multipath,the bit error rate of FH signal based on the suggested method is below 10-6 when SIR =-10 dB and SNR -4 dB.The reservoir test of 3 km results show that it could attain the correct IFF.Because it is expressed as a covert signal,the enemy can＇t detect it.The numerical simulation and lake test results show that the IFF method proposed is simple and flexible,and has fast identification speed,high identification rate and the performance of concealment and anti-interception.

关 键 词：信息处理技术 敌我识别 声纹标志 隐蔽通信 

分 类 号：TN911.2[电子电信—通信与信息系统]