IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Joint rate and power optimization for SIC in uplink NOMA systems
Meilin HeGuanghui SongJun Cheng
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2018 Volume 7 Issue 2 Pages 48-53

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Abstract

To implement K-user multi-rate multi-power transmission in non-orthogonal multiple access systems with successive interference cancellation, a repeat accumulator code serially concatenated with a spreading is employed for each user to implement a variable, low-rate coding. A joint rate and power optimization (RPO) is proposed to maximize the sum rate with error free decoding. Numerical results show that our proposed coding-spreading scheme with joint RPO, supporting the multi-rate transmission with the same structure of encoder, approaches the Shannon limit.

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© 2018 The Institute of Electronics, Information and Communication Engineers
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