QPSK全数字接收机PDF，详细介绍了QPSK全数字接收机的构成，环路滤波器、内插器、Gardner定时恢复等部分的详细设计-QPSK digital receiver PDF, details of the composition of QPSK digital receiver, loop filter, interpolator, Gardner Timing Recovery and other parts of the detailed design

发射机的设计是采用m序列来扩展二进制数据流，将其扩频为宽频信号，并采用QPSK调制方式将信号调制后发送出去。信号经过AWGN信道传输到接收端。接收机采用相干解调原理解调信号，采用的解扩码序列与发射机扩频码序列完全相同，信号经解扩调制后，带宽恢复原始宽度。-Transmitter design is the use of m sequence to expand the binary data stream, the spread spectrum is a broadband signal, a