Architecture Design of Frequency Domain Processing for Flexible and Re-configurable WiMAX OFDMA Receiver

This paper proposes hardware architecture of WiMAX OFDMA frequency domain processing system. The system mainly consists of channel estimator, equalizer, and subcarrier de-allocator. The system is optimized for flexible and re-configurable WiMAX OFDMA receiver. The flexibility feature is obtained by employing flexible control unit approach using task FIFO. Using this scheme, the designed system can handle various and complex data structure within OFDMA frame. The propesed architecture has been implemented in 0.13 μm CMOS technology. The implementation result shows that chip area is about 0.45 mm2 and able to work in targeted system clock 54 MHz.