Study on the method of pseudo distance measurement based on DTMB signal

Based on the analysis of the frame structure of DTMB, this paper studies the method of realizing pseudo distance measurement by using the partial PN code of the signal frame synchronization head to perform correlation operation with the received signal. In practical measurement, the influence of frequency offset on correlation performance is eliminated by square loop structure, and the correlation performance and pseudo range measurement accuracy of PN sequence are improved.