OPTIMAL WEIGHTS FOR MMSE SPACE-TIME EQUALIZER OF MULTICODE CDMA SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an enhanced chip-level linear space-time equalizer for multiple-input-multiple-output (MIMO) multi-code CDMA systems reusing the same spreading codes in different transmit antennas.;SOLUTION: Reuse of the spreading codes at a MIMO CDMA receiver 104 creates an on-time inter-stream interference component (or cross-talk among distinct transmit antenna signals) which reuse the same spreading code as a desired signal in a soft metric sequence of the MIMO CDMA receiver after MMSE space-time equalization. The MMSE space-time equalizer 118 has an MMSE weighting vector that takes the despreading effect into account.;COPYRIGHT: (C)2014,JPO&INPIT