期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 68, 期 2, 页码 1501-1509出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2018.2886953
关键词
Sparse code multiple access; codebook design; golden angle modulation; mapping; PAPR reduction
资金
- Huawei Technologies Co. Ltd.
- Engineering and Physical Sciences Research Council [EP/P03456X/1]
- EPSRC [EP/J017655/1, EP/P03456X/1] Funding Source: UKRI
In this paper, we propose to use golden angle modulation (GAM) points to construct codebooks for uplink and downlink sparse code multiple access (SCMA) systems. We provide two categories of codebooks with one and two optimization parameters, respectively. The advantages of the proposed design method are twofold: 1) the number of optimization variables is independent of codebook and system parameters; and 2) it is simple to implement. In the downlink, we use GAM points to build a multidimensional mother constellation for SCMA codebooks, while in the uplink GAM points are directly mapped to user codebooks. The proposed codebooks exhibit good performance with low peak to average power ratio compared to the codebooks proposed in the literature based on constellation rotation and interleaving.
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