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Implementation of an SIC based MC-CDMA Base Station Receiver A. C. McCormick, P. M. Grant, J. S. Thompson, T. Arslan and A. T. Erdogan
 

Summary: Implementation of an SIC based MC-CDMA Base Station Receiver
A. C. McCormick, P. M. Grant, J. S. Thompson, T. Arslan and A. T. Erdogan
Dept. of Electronics and Electrical Engineering,
The University of Edinburgh, The King's Buildings,
Mayfield Road, Edinburgh, EH9 3JL, Scotland
1 Introduction
Investigation of the performance of uplink multi-carrier code-division multiple access (MC-CDMA) receiver designs
[1] has indicated that the inclusion of decision statistic ordered successive interference cancellation (SIC) [2] in the
receiver provides good performance for a large number of users with an algorithm of only
complexity. Accurate
channel estimation can be a problem in uplink MC-CDMA, but if the channels have a small delay spread, narrowband
pilots and interpolation can be applied to provide accurate channel estimates, without requiring a high pilot signal to
noise ratio.
The hardware implementation of low power MC-CDMA mobile stations has been considered in [3]. This work is
extended to the uplink in this paper. In particular the implementation of the decision statistic ordered SIC algorithm
is considered. Although much of the SIC algorithm requires serial operation, some parallelisation can be applied to
reduce the number of clock cycles required from
to
. A 48 user QPSK system is considered and therefore a
reduction of clock rate from times the symbol rate to times the symbol rate is desirable, however both serial

  

Source: Arslan, Tughrul - School of Engineering and Electronics, University of Edinburgh

 

Collections: Engineering