FPGA implementation of an improved channel estimation algorithm for mobile WiMAX

In this paper, we present an FPGA implementation of an improved channel estimation technique for the OFDM based WiMAX systems. The proposed technique is a modified version of the well-known MMSE technique. The implementation minimizes the complexity of the accurate MMSE based channel estimator by making use of sets of previously calculated filter coefficients in estimation. The hardware architecture presented has a major advantage which is its ability to adapt itself to cope with different wireless standards not only WiMAX.