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2008
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Repeat Accumulate code Division Multiple Access and its Hybrid Detection

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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.
Rong Zhang, Lei Xu, Sheng Chen, Lajos Hanzo
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICC
Authors Rong Zhang, Lei Xu, Sheng Chen, Lajos Hanzo
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