基于Costas环的通用数字信号载波恢复及FPGA实现

Design and FPGA Implementation of Multipurpose Digital Signal Carrier Recovery Based on Costas Loop

BPSK、QPSK、OQPSK、8PSK和16QAM在数字通信中应用广泛。针对非合作接收机解调数字通信信号的需求,研究了基于Costas环的通用数字信号载波恢复技术。仅需通过调整环路滤波参数和改变Costas环中鉴相器的鉴相方式,即可实现BPSK、QPSK、OQPSK、8PSK和16QAM等数字信号的载波恢复。对算法进行了仿真验证,并在FPGA上完成了硬件实现。

BPSK,QPSK,OQPSK,8PSK and 16QAM is widely used in digital communication system.In view of multipurpose digital demodulation of non-cooperative receiver,carrier recovery technology based on Costas loop is studied.BPSK,QPSK,OQPSK,8PSK and 16QAM can be carrier recovered just by changing the parameter of loop filter and phase discriminator.Algorithm is fully verified by simulation and the logic circuit is implemented in FPGA chip.