Comprehensive measurement method for broadband time delay

The invention discloses a comprehensive measurement method for broadband time delay. According to the comprehensive measurement method, linear frequency-modulated signals are adopted as time delay measurement signals; a comparison data table is established by using a high-power sampling rate, the higher the sampling rate, the finer the established data table, and the more accurate the estimated peak; by taking the influence on signal amplitude caused by system noises and the needs of practical application into account, the selected sampling rate is eight times higher than the actual sampling rate and can also be higher. According to the method, more accurate time delay can be estimated based on a waveform comparison lookup table manner, and the echo time delay of a broadband system can be measured more precisely.