BPSK调制高动态遥测接收机的设计

针对BPSK调制的高动态遥测接收机的多普勒频率漂移大和码元符号周期随着多普勒变化的问题,提出了一种全数字的接收机结构,研究了载波频率跟踪和码元符号定时跟踪的跟踪算法,指出了跟踪环路的稳定条件.仿真验证了该算法和接收机结构的可行性,结果表明,该接收机在初始频偏23 kHz、加速度20g、载波初始相位π/2、码环初始偏差5...

Design of BPSK Modulated High Dynamic Telemetry Digital Receiver

In order to compensate the Doppler frequency drift and chip period variation of the BPSK-modulated telemetry receiver, a new all-digital-receiver structure is proposed. Both the carrier tracking algorithm and the timing tracking algorithm are studied. The stability conditions of both loops are also addressed. Simulations are employed to prove the feasibility of the algorithms and the receiver structure. Simulations show that the loop can still get acquisition and keep tracking even with the condition of 23 kHz initial frequency offset, 20 g acceleration, π/2initial carrier offset, and 5/8 chip initial code offset.