Linearised transceivers for mobile communications base stations using adaptive array antennas

With the increased demand on higher capacity and better services from mobile communications networks, the rise of an adaptive antenna in mobile communications base stations is seen as inevitable. This technique has the potential of increased spectrum efficiency, extended range of coverage and higher data throughput. It has presented an incentive to further investigate hardware aspects in the realisation of these systems. One of the key components in an adaptive antenna system is the transceiver subsystem. This contribution investigates linearity aspects of the up- and down-conversion chain on the performance of adaptive antennas and suggests solutions to the non-linearity problems within an adaptive antenna system.