Paper Info
Title
Cancellation Moderating Factor Control for DS-CDMA Non-linear Interference Canceller with Antenna Diversity Reception
Abstract
In a CDMA non-linear interference canceller, a generated replica of an interference signal is multiplied by a positive number smaller than unity, which is called cancellation moderating factor (CMF), to prevent interference enhancement due to inaccurate replica subtraction. In this paper, two CMF controlling schemes applicable to a multistage parallel interference canceller with multi-antenna (spatial diversity) reception are proposed. They control CMF by using the mean square error of the complex channel gain or by using the ratio of the estimated power of each interference signal to remaining interference signals' power, in order to mitigate the replica subtraction error due to inaccurate channel estimation. The performance of the proposed schemes are evaluated by computer simulations assuming an asynchronous uplink single chip-rate variable spreading factor DS-CDMA system. The simulation results show that the proposed schemes with higher order diversity reception improve the bit error rate (BER) performance compared with a conventional scheme considering the tentative decision error or fixed CMF settings. Their performance improvement is by 0.1--0.9 dB in terms of the required Eb/N0 at an average BER of 10-5 over exponentially decaying 5-path Rayleigh distributed channels when the number of receiving antennas is 6.
Year
DOI
Venue
2005
10.1093/ietfec/e88-a.7.1921
IEICE Transactions
Keywords
Field
DocType
bit error rate,ds-cdma non-linear interference canceller,fixed cmf setting,cancellation moderating factor control,cdma non-linear interference canceller,interference enhancement,tentative decision error,multistage parallel interference canceller,proposed scheme,mean square error,replica subtraction error,antenna diversity reception,interference signal,interference cancellation,antenna diversity
Antenna diversity,Telecommunications,Single antenna interference cancellation,Communication channel,Algorithm,Mean squared error,Theoretical computer science,Interference (wave propagation),Code division multiple access,Mathematics,Telecommunications link,Bit error rate
Journal
Volume
Issue
ISSN
E88-A
7
0916-8508
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Kazuto Yano1189.01
shoichi220525.26
Susumu Yoshida331.52