The major evolution of UMTS (Universal Mobile Telecommunications System) in recent years is the High Speed Downlink Packet Access (HSDPA)which provides data rates up to 10Mbps. The implementation of HSDPA includes multicodes transmission in joint

This paper describes the protocol reference model of WiMAX，then analyzes the main features of WiMAX physical layer ． Furthermore，we gives the realization mode of WiMAX physical layer,i．e．WMAN—SC，WMAN—SCa，WMAN—OFDM， WMAN—OFDMA，WirelessHUMAN．In c