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Summary: A LOW POWER MMSE RECEIVER FOR MULTI-CARRIER CDMA
A. C. McCormick, P. M. Grant, J. S. Thompson, T. Arslan and A. T. Erdogan
Deptartment of Electronics and Electrical Engineering
The University of Edinburgh
The King's Buildings, Mayfield Road
Edinburgh, EH9 3JL, U.K.
ABSTRACT
The power consumptionof a minimum mean square error (MMSE)
multi-carrier CDMA receiver implemented in digital hardware is
considered. A low power block based architecture is investigated
for the combiner sub-system, and compared with a multiply accu-
mulate circuit approach. Simulations using data consistent with
typical performance of a multi-carrier CDMA receiver indicate
that the block based approach can produce a power reduction of
around 50%.
1. INTRODUCTION
Multi-Carrier CDMA [1, 2] is a spread spectrum technology which
combinesthe advantagesof OFDM (orthogonal frequency division
multiplexing) and CDMA (code division multiple access) to pro-
duce a spectrally efficient multi-user radio access system. This
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