Repeat accumulate code division multiple access and its hybrid detection

Zhang, R., Xu, L., Chen, S. and Hanzo, L. (2008) Repeat accumulate code division multiple access and its hybrid detection At IEEE ICC'08, China. 19 - 23 May 2008. , pp. 4790-4794.


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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.

Item Type: Conference or Workshop Item (Other)
Venue - Dates: IEEE ICC'08, China, 2008-05-19 - 2008-05-23
Organisations: Southampton Wireless Group
ePrint ID: 265804
Date :
Date Event
May 2008Published
Date Deposited: 27 May 2008 15:13
Last Modified: 17 Apr 2017 19:13
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