In some broadband communication system, for example the wireless LAN which combines with OFDM technology and wireless MAN, different circumstance and using place will make different requirement to communication system, its modulation chi flat iron way will adjust according to change of channel condition. To be a big application network, its hardware platform can design unified, but adopt different modulation/demodulation algorithm chi hair straighteners according to different application situation.We put forward a self-adapting bit and power allocates arithmetic which maintan a certain transmission rate in the OFDM system. This arithmetic appilied in multi-route frenquency selectivity fading channel of superpose Gs white noise. Simulation result shouws, this arithmetic erro rate performance in advance of geometric proportion geometric proportion hair straighteners obviously, and it is suited to enhance frequency spectrum utilance and quality of serves in cheap ralph lauren polo shirts mobile communication.OFDM system was imeplement on Lacoste Polo DSP processor by research, discusses the software development procedure of whole baseband system, dissertates programming thoughts, explains mutli-channel serial port and DMA which applicated in system, and key code of programme. A lot of simulation indicates that the system performance should improve clearly if we adopt self-adapting technology .
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