A “self-decorrelating” technique to enhance blind space-time RAKE receivers with single-user-type DS-CDMA detectors

A novel “self-decorrelating” technique is proposed to enhance the multipath constructive summation capability and the interference rejection capability of a class of maximum-SINR blind space-time CDMA RAKE receivers designed to tackle the near-far problem. This proposed “self-decorrelating” technique appears to have effectively removed the near-far problem´s error floor at high SNR; and the proposed technique can also significant decrease the error rate. Moreover, this “blind” space-time processing receiver architecture needs no prior knowledge nor explicit estimation of (1) the channel´s multipath arrival angle or arrival delay or power profile, (2) the receiver´s nominal or actual antenna array manifold, and (3) the other CDMA users´ signature spreading codes. Preliminary simulations suggest very significant performance improvement realizable from the proposed technique. Though developed for direct-sequence CDMA, the proposed technique might be adopted for frequency-hopping CDMA