CAJ | 학술논문

　　为了提高连线干涉测量中两测站接收同一信号的时延差估计精度，提出一种利用宽带数传信号进行处理的新思路。用FX型相关处理算法求两路宽带数传信号互功率谱得到的群时延，解载波相位延迟的整周相位模糊，通过载波的相位延迟求出更精确的时延。针对BPSK调制的宽带数传信号，对信号进行平方变换后分别估计两路信号的载波的频率和相位并求出载波相位延迟。蒙特卡洛仿真验证，该方法在一定信噪比条件下可以提高信号到达两测站时延差估计精度。
　　위료제고련선간섭측량중량측참접수동일신호적시연차고계정도，제출일충이용관대수전신호진행처리적신사로。용FX형상관처리산법구량로관대수전신호호공솔보득도적군시연，해재파상위연지적정주상위모호，통과재파적상위연지구출경정학적시연。침대BPSK조제적관대수전신호，대신호진행평방변환후분별고계량로신호적재파적빈솔화상위병구출재파상위연지。몽특잡락방진험증，해방법재일정신조비조건하가이제고신호도체량측참시연차고계정도。
To improve the estimated accuracy of time?delay difference when two measurement stationsin connecting?line in?terferometry receives a same signal,a new processing idea to utilize broadband transmission signal is proposed. FX correlation processing algorithm is used to derive the group delay recieved by cross power spectrum of two channel broadband transmission signals to solve the phase period ambiguity of carrier’s phase delay,and then calculate the more accurate time?delay by carrier phase delay. For broadband transmission signal modulated by BPSK,two channel signals’carrier frequency and phase are esti?mated respectively after a square transformation of the signal,then carrier phase delay is obtained. Monte Carlo simulation result proves validity and effectiveness of the method. Under the condition of certain signal to noise ratio,the method can improve the estimation accuracy of time delay difference which signal reaches to two stations.