本人亲自写的WIFI 802.11b发送过程，包括preamble生成， PSDU生成，组帧，巴克码扩频，CCK调制，DBPSK调制，DQPSK调制，CRC校验，代码完整可运行-I personally wrote the 802.11b WIFI sending process, including the preamble generation, PSDU generation, group frame, PN code spread spectrum, CCK modulation, DB