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EXIT chart aided design of DS-CDMA UltraWideBand systems using Iterative decoding

EXIT chart aided design of DS-CDMA UltraWideBand systems using Iterative decoding
EXIT chart aided design of DS-CDMA UltraWideBand systems using Iterative decoding
This paper presents a novel UltraWideBand (UWB), Direct Sequence Code Division Multiple Access (DS-CDMA) aided system designed for the IEEE 802.15.3a UWB channel specifications. Substantial performance improvements can be attained by serially concatenated channel encoding combined with a Unity Rate Code (URC). We compare the performance of the iterative aided decoding Correlation (Corr) and Minimum Mean Square Error (MMSE) detectors exchanging extrinsic information between the URC’s decoder as well as the outer Recursive Systematic Convolutional (RSC) code’s decoder. Moreover, the iterative decoding convergence analysis of the proposed system is carried out with the aid of xtrinsic Information Transfer (EXIT) charts. As expected, the iteratively decoded fully-loaded system employing MMSE detection outperforms its counterpart employing the equivalent Corr detection. Explicitly, UWB DS-CDMA using the MMSE detector attains a BER of $10^{−5}$ at Eb/No=2dB when supporting U=32 users employing i=12 decoding iterations, while the same system using the Corr detector operates at BER-$10^{−1}$.
1-5
Riaz, R.A.
559cfb89-6ad8-4fd4-88e5-70d792e45055
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Ahmed, Q.Z.
c5d6e7e3-9c2d-4f14-a158-47e9d8fa25f9
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Riaz, R.A.
559cfb89-6ad8-4fd4-88e5-70d792e45055
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Ahmed, Q.Z.
c5d6e7e3-9c2d-4f14-a158-47e9d8fa25f9
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Riaz, R.A., El-Hajjar, Mohammed, Ahmed, Q.Z., Ng, Soon Xin, Chen, Sheng and Hanzo, Lajos (2008) EXIT chart aided design of DS-CDMA UltraWideBand systems using Iterative decoding. In VTC2008-Fall. pp. 1-5 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents a novel UltraWideBand (UWB), Direct Sequence Code Division Multiple Access (DS-CDMA) aided system designed for the IEEE 802.15.3a UWB channel specifications. Substantial performance improvements can be attained by serially concatenated channel encoding combined with a Unity Rate Code (URC). We compare the performance of the iterative aided decoding Correlation (Corr) and Minimum Mean Square Error (MMSE) detectors exchanging extrinsic information between the URC’s decoder as well as the outer Recursive Systematic Convolutional (RSC) code’s decoder. Moreover, the iterative decoding convergence analysis of the proposed system is carried out with the aid of xtrinsic Information Transfer (EXIT) charts. As expected, the iteratively decoded fully-loaded system employing MMSE detection outperforms its counterpart employing the equivalent Corr detection. Explicitly, UWB DS-CDMA using the MMSE detector attains a BER of $10^{−5}$ at Eb/No=2dB when supporting U=32 users employing i=12 decoding iterations, while the same system using the Corr detector operates at BER-$10^{−1}$.

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Published date: 21 September 2008

Identifiers

Local EPrints ID: 448546
URI: http://eprints.soton.ac.uk/id/eprint/448546
PURE UUID: 76da85b0-fb11-485b-aa8b-e2c5dd80b658
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401
ORCID for Soon Xin Ng: ORCID iD orcid.org/0000-0002-0930-7194
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 26 Apr 2021 18:36
Last modified: 27 Apr 2021 01:45

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Contributors

Author: R.A. Riaz
Author: Mohammed El-Hajjar ORCID iD
Author: Q.Z. Ahmed
Author: Soon Xin Ng ORCID iD
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD

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