High speed address generating design for the dynamic modulation scheme supportive WiMAX deinterleaver

In this paper a new high speed address generator for the dynamic modulation scheme supportive WiMAX deinterleaver design is proposed. The WiMAX can be both fixed and mobile, in this work the mobile WiMAX is given more importance. The mobile WiMAX uses interleaving and deinterleaving techniques in its transreceiver for eliminating the transmission errors. The WiMAX supports QPSK, 16-QAM and 64-QAM modulation schemes for establishing a connection between subscriber and base stations. Deinterleaver has to produce the addresses for these different modulation schemes by performing the inverse operation of interleaving. The address generator in the deinterleaver hinders the performance of the receiver section of the WiMAX system so it has to be optimized to improve the overall performance. In this paper a new ASIC based design has been proposed for the address generator and the design is been modelled in VHDL.