The Design And Implemtation Of The Simulation Platform Of The Mobile WiMAX Physical Layer Based On Virtual Instruments

WiMAX (World interoperability for Microwave Access) is the one of the fastest growing and the most widely used wireless broadband communication technologies, with the advantages of broad coverage, high data rate, low cost of station establishment and high mobility. Many countries and companies invest a lot in it and make it as a re-search focus.After analyzing the key technologies of WiMAX and referring the idea of soft-ware radio, a scheme of WiMAX PHY simulation platfrom has been proposed. In the design, transmitting and receiving WiMAX downlink data of OFDM PHY layer should be supported; transmitter and receiver's function modules are complete; BPSK, QPSK, 16QAM and 64QAM should be supported.256 points IFFT/FFT should be supported (Expandable).In the implementation process, code development work of the WiMAX physical layer simulation platform is completed in the LabVIEW development envi-ronment, based on the virtual instrument technology.In the implementation process of transmitter, WiMAX OFDM physical layer downlink data transmitter is implemented, including the scrambler, convolutional en-coder, interleaver, modulation,IFFT, pilot insertion, cyclic prefix insertion and other major functional blocks, refer to the IEEE802.16e reference standard.In the implementation process of receiver, design and improve the synchroniza-tion module of the reveiver, and to achieve the frame detection, carrier frequency offset compensation, channel estimation and equalization, and phase compensation.After synchronization module, FFT, demodulation, deinterleaving and descrambling is im-plemented and original signal is recoveried.Finally, WiMAX physical layer simulation platform is implemented successfully; it can correctly send and receive data information, simulate the algorithm and evaluate the system performance.The thesis's goal is achieved.