| Paper Details: | Downloads: 447 |
| Serial Number: | P1150528001
|
| Title: | A NEW METHODOLOGY FOR SWITCHING MULTIUSER DETECTOR
FOR DSCDMA SYSTEMS
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| Authors: | B.Sivakumar and S.SubhaRani and A.Shanmugam
|
| Abstract: | In this paper a switching multiuser detector for CDMA
systems is proposed which dynamically switches
between NN (Neural Network) tuned SIC (Serial
Interference Canceller) and matched filter operations
depending upon the channel characteristics. The
switching detection process significantly reduces the
computational complexity while maintaining the quality
of service requirements such as its error rate,
throughput and delay constraint. The receiver processes
the received matched filter signal and it performs
certain estimation on output of the matched filter. The
estimates are used to decide whether to perform NNSIC
or not. The work was carried out in Synchronous
environment with AWGN (Additive White Gaussian
Noise) and Rayleigh fading channels. Feed forward
network is considered and back propagation technique
is employed to evaluate the performance of NNSIC
with the existing standard receiver. Comparisons of
BER (Bit Error Rate) Vs SNR (Signal-to–Noise Ratio)
with the number of users involved, near- far and
switching cases with SIR (Signal-to-Interference Ratio)
was also considered. The simulated result proves that
the derived model has got good performance than the
existing and the conventional receivers. The
comparison is done through simulations, using Matlab
with different channel characteristic, users scenario
with neural, neural followed by SIC for analysis and
justification.
|
| Keywords: | Multiuser Detection (MUD), Channel,
CDMA, Neural SIC, Users, SNR.
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| Journal/Conference: | International Journal of Graphics, Vision and Image Processing
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| Volume: | 5
|
| Issue: | 8
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| Submission Date: | 6/1/2005 12:00:00 AM
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| Review Date: | 7/1/2005 12:00:00 AM
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| Publishing Date: | 8/1/2005 12:00:00 AM
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| Article Downloads: | 447
|
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