The effects of multiple access schemes on equalization for broadband wireless local loop systems

Single carrier time division multiple access (TDMA) and orthogonal frequency division multiple access (OFDMA) are promising for broadband fixed radio access (FRA) in terms of flexibility, bandwidth-efficiency and implementation cost. Coherent detection of QPSK-symbols requires adaptive equalization. We focus on equalizer adaptation in time-variant frequency-selective FRA-channels in the presence of oscillator phase noise. The implementation complexity of the equalizer is estimated as well.