... Communications and NetworkingVolume 2009, Article ID 953018, 9 pagesdoi:10.1155/2009/953018Research Article Advanced Receiver Design for Quadrature OFDMA SystemsLin Luo,1, 2Jian (Andrew) ... iterationQ -OFDMA, MMSE, no iterationQ -OFDMA, MMSE, 2 iterationsQ -OFDMA, MMSE, 5 iterationsQ -OFDMA, FD-DFEFigure 6: BER performance comparison between Q -OFDMA systems with different receivers ... 30Q -OFDMA, ZF, no iterationQ -OFDMA, MMSE, no iterationQ -OFDMA, MMSE, 2 iterationsQ -OFDMA, MMSE, 5 iterationsFigure 7: BER performance comparison between Q -OFDMA systems with different receivers...