Abstract:

Carrier synchronization and equalization are two important parts in QAM demodulator. This paper propose a joint structure algorithm of universal carrier recovery loop and adaptive equalization which is suitable for the signal of QAM. The algorithm realizes a high accuracy synchronous tracking and locking to the carrier frequency and phase. Modeling and simulating the design in System Generator and the result of simulation indicates that the BER is one in a million, and the joint algorithm has better stability and good tracking capability. Through simplifying the algorithm the hardware resource is decreased and can meet the realistic requirements of receiver at the same time.

Key words: 16QAM;LMS;adaptive equalization;universal carrier recovery loop