Blind adaptive constrained MOE receiver for uplink MC-CDMA systems with real signaling in multi-cell environments

Authors:
Bangwon Seo;Hyung-Myung Kim
Affiliations:
Korea Advanced Institute of Science and Technology, Daejeon, Korea;Korea Advanced Institute of Science and Technology, Daejeon, Korea
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

A blind adaptive constrained minimum output energy (MOE) receiver has been proposed for the uplink multicarrier code-division multiple access (MC-CDMA) system in a multi-cell environment when some users, including the desired user, employ real-valued modulation such as binary phase-shift keying (BPSK) or amplitude-shift keying (ASK). Since the imaginary part of residual interference at the filter output does not affect the decision of the desired user's data in this case, the proposed receiver has been designed to perfectly eliminate the real part of residual in-cell interference using the information of the spreading sequence and to reduce the real part of residual inter-cell interference by minimizing the constrained output energy. Results of analysis and simulation show that the proposed blind adaptive algorithm converges faster and has a higher steady-state signal-to-interference and noise ratio (SINR) than those of conventional schemes.