The Performance of Linear Space Time Processing in Overloaded Environments

摘要

This evaluates the ability of linear space-time processing to extract symbol-asynchronous linear pulse-amplitude modulated (PAM) signals with RRCOS pulse shaping (35%-75% rolloff) in an overloaded environment This paper demonstrates that while linear space time processing may fail to extract most signals in overloaded environments, it can often extract at least one signal by exploiting both spatial separation and the excess bandwidth of co-channel interferers. The performance of STP is analyzed in terms of ranked output SINR statistics, compiled through the use of semi-analytic simulation. The effect of signal excess-bandwidth, adjacent channel interference, the number of users, array input SNR, and array type are considered. The channel statistics of all users are assumed known.