Soft Decoding Assisted Interference Cancellation in a Non-Binary LDPC Coded Fast Frequency Hopping Multiuser System Using Product Combining
Soft Decoding Assisted Interference Cancellation in a Non-Binary LDPC Coded Fast Frequency Hopping Multiuser System Using Product Combining
In this contribution, soft-input-soft-output (SISO) decoding aided successive interference cancellation (SIC) is considered in fast frequency hopping (FFH), M-ary frequency shift keying (MFSK) using product combining (PC), when operating in multiple access (MA) Nakagami-m channels. All users’ Mary source symbols are encoded using non-binary LDPC codes and the encoded symbols are transmitted using FFH-MFSK modulation. A sub-optimum soft metric is proposed which is based on self-normalization of the diversity combiner outputs. In the context of the proposed SIC scheme, the receiver exploits the soft information fed back by the LDPC decoder to the demodulator in order to cancel the interference imposed by the reliably detected symbols. Our simulation results show that the proposed scheme is capable of combatting the effects of multiuser interference and outperforms conventional iterative decoding by about 1dB.
1717-1721
Ahmed, S
a5507120-ae95-4d45-a68f-e07396ee224a
Yang, L-L
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Guo, F
b3f6584c-4aa4-4b74-a10e-f6e87761a630
30 September 2007
Ahmed, S
a5507120-ae95-4d45-a68f-e07396ee224a
Yang, L-L
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Guo, F
b3f6584c-4aa4-4b74-a10e-f6e87761a630
Ahmed, S, Yang, L-L, Hanzo, L and Guo, F
(2007)
Soft Decoding Assisted Interference Cancellation in a Non-Binary LDPC Coded Fast Frequency Hopping Multiuser System Using Product Combining.
IEEE VTC'07 (Fall), Baltimore, MD, United States.
30 Sep - 03 Oct 2007.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this contribution, soft-input-soft-output (SISO) decoding aided successive interference cancellation (SIC) is considered in fast frequency hopping (FFH), M-ary frequency shift keying (MFSK) using product combining (PC), when operating in multiple access (MA) Nakagami-m channels. All users’ Mary source symbols are encoded using non-binary LDPC codes and the encoded symbols are transmitted using FFH-MFSK modulation. A sub-optimum soft metric is proposed which is based on self-normalization of the diversity combiner outputs. In the context of the proposed SIC scheme, the receiver exploits the soft information fed back by the LDPC decoder to the demodulator in order to cancel the interference imposed by the reliably detected symbols. Our simulation results show that the proposed scheme is capable of combatting the effects of multiuser interference and outperforms conventional iterative decoding by about 1dB.
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Published date: 30 September 2007
Venue - Dates:
IEEE VTC'07 (Fall), Baltimore, MD, United States, 2007-09-30 - 2007-10-03
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 264952
URI: http://eprints.soton.ac.uk/id/eprint/264952
PURE UUID: 2179f2c8-fae0-4fcd-96a5-b9614d87b4a2
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Date deposited: 12 Dec 2007 14:47
Last modified: 18 Mar 2024 02:49
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Contributors
Author:
S Ahmed
Author:
L-L Yang
Author:
L Hanzo
Author:
F Guo
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