微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2014年
6期
51-53,57
,共4页
Duffing 振荡器阵列%弱信号检测%音频广播节目%李雅普诺夫指数
Duffing 振盪器陣列%弱信號檢測%音頻廣播節目%李雅普諾伕指數
Duffing 진탕기진렬%약신호검측%음빈엄파절목%리아보낙부지수
Duffing oscillator array%weak signal detection%audio programs%Lyapunov exponent
为识别同频音频广播节目，提出在节目源间歇地添加确知的微弱正弦周期信号作为识别信息， Duffing 振荡器阵列检测解调的音频信号中弱正弦周期信号并确定时隙内 Duffing 振子运动状态的跃变次数，以识别音频广播节目。使用16个音频进行仿真，从仿真结果可以看出， Duffing 振荡器阵列检测到的李雅普诺夫指数值跃变次数与间歇加入的微弱正弦周期信号的次数一致；信噪比在46 dB～52 dB 之间，符合音频广播的信噪比要求，该识别方法可行。
為識彆同頻音頻廣播節目，提齣在節目源間歇地添加確知的微弱正絃週期信號作為識彆信息， Duffing 振盪器陣列檢測解調的音頻信號中弱正絃週期信號併確定時隙內 Duffing 振子運動狀態的躍變次數，以識彆音頻廣播節目。使用16箇音頻進行倣真，從倣真結果可以看齣， Duffing 振盪器陣列檢測到的李雅普諾伕指數值躍變次數與間歇加入的微弱正絃週期信號的次數一緻；信譟比在46 dB～52 dB 之間，符閤音頻廣播的信譟比要求，該識彆方法可行。
위식별동빈음빈엄파절목，제출재절목원간헐지첨가학지적미약정현주기신호작위식별신식， Duffing 진탕기진렬검측해조적음빈신호중약정현주기신호병학정시극내 Duffing 진자운동상태적약변차수，이식별음빈엄파절목。사용16개음빈진행방진，종방진결과가이간출， Duffing 진탕기진렬검측도적리아보낙부지수치약변차수여간헐가입적미약정현주기신호적차수일치；신조비재46 dB～52 dB 지간，부합음빈엄파적신조비요구，해식별방법가행。
For the identification of the same frequency audio broadcasting programs , the program source intermittently adding weak sinusoidal periodic signal known as identification information , detect the demodulation audio signal using Duffing oscillator ar-ray known weak sinusoidal periodic signal and determines a time slot Duffing oscillator motion state transition times , thereby identi-fying audio broadcast . using 16 audio by simulation . Simulation results show the Duffing oscillator array detected Lyapunov exponent value of weak sinusoidal periodic signal jump times and intermittent addition of the times; signal-to-noise ratio between 46 dB and 52 dB , in accordance with the SNR required audio broadcasting . It proves that the recognition method is feasible .
