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Iterative Decoding and Soft Interference Cancellation in Fast Frequency Hopping Multiuser System Using Clipped Combining

Iterative Decoding and Soft Interference Cancellation in Fast Frequency Hopping Multiuser System Using Clipped Combining
Iterative Decoding and Soft Interference Cancellation in Fast Frequency Hopping Multiuser System Using Clipped Combining
Iterative decoding (ID) aided fast frequency hopping (FFH), M-ary frequency shift keying (MFSK) using clipped combining in multiple access (MA) channels is investigated. All users’ data are convolutionally encoded and the encoded bits are interleaved and converted to M-ary symbols, which are transmitted using FFH-MFSK modulation. The soft metrics to be passed from the demodulator to the decoder are derived assuming a Rayleigh fading channel. We also propose a novel multiuser detection (MUD) scheme which employs joint soft decoding as well as successive interference cancellation (SIC), the receiver exploiting the soft information fed back by the decoder to the demodulator in order to cancel the interference imposed by reliable symbols. Our simulation results show that the proposed scheme is capable of combatting multiuser interference and outperforms the conventional ID by about 3dB.
723-728
Ahmed, S.
8946ec30-34fd-4a8a-b3e9-89f326b57251
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Yang, L.L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Ahmed, S.
8946ec30-34fd-4a8a-b3e9-89f326b57251
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Yang, L.L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Ahmed, S., Ng, S.X., Yang, L.L. and Hanzo, L. (2007) Iterative Decoding and Soft Interference Cancellation in Fast Frequency Hopping Multiuser System Using Clipped Combining At IEEE WCNC'07. 11 - 15 Mar 2007. , pp. 723-728.

Record type: Conference or Workshop Item (Paper)

Abstract

Iterative decoding (ID) aided fast frequency hopping (FFH), M-ary frequency shift keying (MFSK) using clipped combining in multiple access (MA) channels is investigated. All users’ data are convolutionally encoded and the encoded bits are interleaved and converted to M-ary symbols, which are transmitted using FFH-MFSK modulation. The soft metrics to be passed from the demodulator to the decoder are derived assuming a Rayleigh fading channel. We also propose a novel multiuser detection (MUD) scheme which employs joint soft decoding as well as successive interference cancellation (SIC), the receiver exploiting the soft information fed back by the decoder to the demodulator in order to cancel the interference imposed by reliable symbols. Our simulation results show that the proposed scheme is capable of combatting multiuser interference and outperforms the conventional ID by about 3dB.

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More information

Published date: 2007
Additional Information: Event Dates: 11-15 March 2007
Venue - Dates: IEEE WCNC'07, 2007-03-11 - 2007-03-15
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 263890
URI: http://eprints.soton.ac.uk/id/eprint/263890
PURE UUID: 55640fbb-102d-4960-8112-71cdf2f9cd62
ORCID for S.X. Ng: ORCID iD orcid.org/0000-0002-0930-7194
ORCID for L.L. Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 19 Apr 2007
Last modified: 18 Jul 2017 07:41

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Contributors

Author: S. Ahmed
Author: S.X. Ng ORCID iD
Author: L.L. Yang ORCID iD
Author: L. Hanzo ORCID iD

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