Upper bounds on the average BER of adaptive arrays in fading environments

This paper presents upper bounds on the average bit error rate (BER) of coh erent detection of PSK and differential detection of DPSK with adaptive arr ays in fading environments. A model where a line of sight (LOS) component a nd Rayleigh distributed scattering components arrive at a receiver with spe cific arrival angles is used considering the correlation of signal between multiple antennas. The upper bounds are expressed in a simple matrix form u sing signal and interference-plus-noise correlation matrices. Examples for the case of 4-element adaptive arrays are given to illustrate the tightness and the application of this upper hounds.