CAJ | 학술논문

　　研究了电子侦察信号处理中正弦信号幅度盲估计问题。提出了一种基于相关累加及线性回归的正弦信号幅度盲估计算法。先对接收到的信号进行频率估计，建立参考信号，将接收信号与参考信号相关后变换到基带并作累加，后将相关累加曲线进行最小二乘线性回归，以回归得到的直线斜率值作为信号幅度的估计值。仿真结果表明，当信噪比大于-3 dB时，方法的估计均方根误差小于1.1倍克拉美罗限，可在低信噪比条件下，实现正弦信号幅度的盲估计。
　　연구료전자정찰신호처리중정현신호폭도맹고계문제。제출료일충기우상관루가급선성회귀적정현신호폭도맹고계산법。선대접수도적신호진행빈솔고계，건립삼고신호，장접수신호여삼고신호상관후변환도기대병작루가，후장상관루가곡선진행최소이승선성회귀，이회귀득도적직선사솔치작위신호폭도적고계치。방진결과표명，당신조비대우-3 dB시，방법적고계균방근오차소우1.1배극랍미라한，가재저신조비조건하，실현정현신호폭도적맹고계。
Amplitude estimation of the sinusoid signals contaminated by noises in the electronic reconnaissance is researched in this article. A new blind amplitude estimator of sinusoid is proposed based on correlation and linear regression. The received sig-nals are transformed to baseband by the reference signals constructed by the estimation of the frequency. Consequently, the gradi-ent of the linear regression of correlation and accumulation curve between the received signals and the referenced ones is regard-ed as the amplitude estimator. Computer simulation results show that the root-mean-square error of the estimator is less than 1.1 times CRLB when the signal to noise ratio is greater than -3 dB and the proposed estimating method is an efficient blind estima-tion for the amplitude of the sinusoid on the condition of low signal to noise ratio.