Interference suppression in M-QAM OFDM mobile wireless receivers using antenna arrays

This paper focuses on using adaptive antenna arrays at a mobile receiver for M-ary OFDM signals. The array structure is devised to mitigate co-channel and inter-channel interference as well as have equalizing effects in the frequency domain. Effects of array mobility on the steering vector are included and spatial smoothing is employed to improve the signal-to-interference plus noise performance of the array. Scenarios of variable number of co-channel interferers with different angles of arrivals as well as inter-channel interferers are considered. The effects of the size of the array, the subarrays, and the spatial smoothing are examined.