Maximum signal-to-noise ratio data combining for one-shot asynchronous multiuser CDMA detector

Using a one-shot matched filter followed by a decorrelating detector, results in outputs corresponding to the main user and the left (earlier bit) and right (current bit) portion of the code of the other users. Due to reduced power, these outputs will result in a degradated probability of error. The purpose of this paper is to propose a method of combining for the data of the split code users. We suggest to use combining gain in proportion to the relative user delays. The resulting decorrelating detector always performs better than the split-output detector. Such diversity data combining eliminates the need for the multiple one-shot filters, one for each user