Research on Key Technology of FQPSK
Jian Zhang · Jisuanji fangzhen · 2006
FQPSK is a modulation technique that fits for high spectrum efficiency and high power efficiency request. The technical principle and performance of the modulation system were analyzed. Then the performance of the system was compared with the other systems, and a kind of time synchronization and carrier wave synchronization method was introduced. The combined estimate of time synchronization and frequency offset is based on high-speed sample method, and the estimate of initial phase is based on non-linear transform. The results of computer simulation indicate that this method is feasible and suits the implement in DSP.