The basic parts of the BFSK transmitter are the preamble and the data input circuit. The preamble sequence is positioned in front of each packet of 122 bits for a total of 128 bits packet. The main purpose of the preamble is to facilitate the recepti

64QAM调制,采用硬件语言verilog实现,其中调用了DDS的IP核-64QAM modulation, using language verilog hardware implementation, which is called the IP core of the DDS