Impact of factor graph on average sum rate for uplink sparse code multiple access systems

Yang, Zheng and Cui, Jingjing and Lei, Xianfu and Ding, Zhiguo and Fan, Pingzhi and Chen, Dageng (2016) Impact of factor graph on average sum rate for uplink sparse code multiple access systems. IEEE Access, 4. pp. 6585-6590. ISSN 2169-3536

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Abstract

In this paper, we first study the average sum rate of sparse code multiple access (SCMA) systems, where a general scenario is considered under the assumption that the distances between the mobile users and the base station are not necessarily identical. Closed-form analytical results are derived for the average sum rate based on which an optimal factor graph matrix is designed for maximizing the capacity of the SCMA systems. Moreover, we propose a low-complexity iterative algorithm to facilitate the design of the optimal graph matrix. Finally, Monte Carlo simulations are provided to corroborate the accuracy of the theoretical results and the efficiency of the proposed iterative algorithm.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Access
Additional Information:
©2016 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
84802
Deposited By:
Deposited On:
18 May 2017 12:06
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Sep 2020 03:26