Analysis of a Synchronization Scheme for DS/FH TT&C Signals
Jinbao Wang · Telecommunication Engineering · 2009
According the high dynamic characteristic of TTC signals,a fast synchronization scheme for DS/FH hybrid spread spectrum signals is proposed. Three-dimensional rapid acquisition methods are introduced in which frequency fast scanning strategy and FFT-based algorithms are used.Through analyzing phenomena of code Doppler and Doppler frequency hoping,the method using tracking results of frequency-hopping pattern and Doppler frequency to compensate the hopping as large as 8.2 kHz is found.Based on comparing several carrier tracking methods,algorithms-embedded loops are suggested to track the signals.