Repeat accumulate code division multiple access and its hybrid detection
Repeat accumulate code division multiple access and its hybrid detection
In this paper, we propose the novel concept of Repeat Accumulate Code Division Multiple Access (RA-CDMA), which employs unique, user-specific channel code generator matrices (interleavers) for differentiating the users. We also suggest a Multilevel Structured (MLS) interleaver generation technique for the sake of reducing the memory storage requirements of our system and compare its correlation properties to those of the conventional random interleaver. A novel hybrid detector is designed for our system with the aid of EXtrinsic Information Transfer (EXIT) charts. Furthermore, we also design a low-complexity unequal power allocation scheme, assigning a different power to each user of this near-capacity transmission scheme. It is shown that when a sufficiently high interleaver length is employed, the RA-CDMA system is capable of approaching the Gaussian channel’s capacity.
4790-4794
Zhang, Rong
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Xu, Lei
2bb029a5-26b2-495c-976a-7e13e38ec709
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
19 May 2008
Zhang, Rong
e54ae375-3495-4e40-aff1-4b8635ee2ede
Xu, Lei
2bb029a5-26b2-495c-976a-7e13e38ec709
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Rong, Xu, Lei, Chen, Sheng and Hanzo, Lajos
(2008)
Repeat accumulate code division multiple access and its hybrid detection.
2008 IEEE International Conference on Communications, , Beijing, China.
19 - 23 May 2008.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
In this paper, we propose the novel concept of Repeat Accumulate Code Division Multiple Access (RA-CDMA), which employs unique, user-specific channel code generator matrices (interleavers) for differentiating the users. We also suggest a Multilevel Structured (MLS) interleaver generation technique for the sake of reducing the memory storage requirements of our system and compare its correlation properties to those of the conventional random interleaver. A novel hybrid detector is designed for our system with the aid of EXtrinsic Information Transfer (EXIT) charts. Furthermore, we also design a low-complexity unequal power allocation scheme, assigning a different power to each user of this near-capacity transmission scheme. It is shown that when a sufficiently high interleaver length is employed, the RA-CDMA system is capable of approaching the Gaussian channel’s capacity.
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Published date: 19 May 2008
Venue - Dates:
2008 IEEE International Conference on Communications, , Beijing, China, 2008-05-19 - 2008-05-23
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 265804
URI: http://eprints.soton.ac.uk/id/eprint/265804
PURE UUID: 0b668d67-bdcd-4041-b199-9299633ef5eb
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Date deposited: 27 May 2008 15:13
Last modified: 30 Nov 2024 02:33
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Contributors
Author:
Rong Zhang
Author:
Lei Xu
Author:
Sheng Chen
Author:
Lajos Hanzo
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