DocumentCode :
1392597
Title :
A simulation comparison of multiuser receivers for cellular CDMA
Author :
Buehrer, R.Michael ; Correal-Mendoza, Neiyer S. ; Woerner, Brian D.
Author_Institution :
Wireless Technol. Lab., Lucent Technol. Bell Labs., Whippany, NJ, USA
Volume :
49
Issue :
4
fYear :
2000
fDate :
7/1/2000 12:00:00 AM
Firstpage :
1065
Lastpage :
1085
Abstract :
Multiuser detection has gained significant notoriety as a potential advanced enabling technology for the next generation of CDMA systems. Due to the limitations of the conventional correlation receiver, the capacity of a single cell using CDMA is limited by self-interference and is subject to the near-far problem. To overcome these drawbacks, several advanced receiver structures have been proposed. Unlike the conventional receiver which treats multiple access interference (MAI) as if it were AWGN, multiuser receivers treat MAI as additional information to aid in detection. Although each of the multiuser types have been the subject of much literature, there is little published work comparing all structures on the basis of common assumptions. We present a comparison of five of the most discussed receiver structures: the decorrelator, the minimum mean square error (MMSE) receiver, the multistage parallel interference cancellation receiver, the successive interference cancellation receiver, and the decorrelating decision feedback receiver. Comparisons are based on both theoretical analysis and simulation results, examining bit error rate (BER) performance in AWGN, Rayleigh fading, and near/far channels. Additionally, receiver structures are compared on the basis of computational complexity as well as robustness to code phase misalignment. Finally, we present simulation results for noncoherent architectures of the aforementioned receivers
Keywords :
AWGN channels; Rayleigh channels; cellular radio; code division multiple access; computational complexity; decision feedback equalisers; decorrelation; error statistics; interference suppression; least mean squares methods; radio receivers; radiofrequency interference; signal detection; AWGN; BER performance; Rayleigh fading; bit error rate; capacity; cellular CDMA; code phase misalignment; computational complexity; decorrelating decision feedback receiver; decorrelator; minimum mean square error receiver; multiple access interference; multistage parallel interference cancellation receiver; multiuser detection; multiuser receivers; near-far problem; near/far channels; noncoherent architectures; self-interference; successive interference cancellation receiver; AWGN; Bit error rate; Computational modeling; Decorrelation; Feedback; Interference cancellation; Mean square error methods; Multiaccess communication; Multiple access interference; Multiuser detection;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/25.875213
Filename :
875213
Link To Document :
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