Paper Info
Title
Spectral-efficiency comparison of different multiple-access schemes under a generalized framework
Abstract
Based on multicarrier communications principles, this paper compares the spectral-efficiency (SE) of a range of multiple-access (MA) schemes via a generalized framework referred to as the generalized code-division multiple-access (GCDMA). As detailed in the paper, by assuming different classes of spreading codes, the GCDMA can be readily configured to form different MA schemes. The ones considered include the frequency-division multiple-access (FDMA), orthogonal multicarrier CDMA (OMC-CDMA), fractionally spread OMC-CDMA (FS/OMC-CDMA), the low-density spreading or sparse-code multiple-access (SCMA), and the multicarrier CDMA (MC-CDMA) employing random binary spreading. For the SE of these MA schemes, we consider two operational modes, namely Mode A of fixed code-allocation and Mode B with adaptive code-allocation. Furthermore, for SCMA, we compare three operational scenarios, namely Scenarios 1,2, and 3, as specified in Section III. We provide the formulas for evaluating the SE of these MA schemes operated in different cases, and compare their SE performance based on numerical simulations.
Year
DOI
Venue
2017
10.1109/ICCChina.2017.8330408
2017 IEEE/CIC International Conference on Communications in China (ICCC)
Keywords
Field
DocType
Multiple-access,FDMA,MC-CDMA,NOMA,SCMA,Spectral-efficiency
Wireless,Computer science,Algorithm,Real-time computing,Time–frequency analysis,Spectral efficiency,Code division multiple access,Binary number
Conference
ISBN
Citations 
PageRank 
978-1-5386-4503-1
0
0.34
References 
Authors
17
3
Name
Order
Citations
PageRank
Dong Yang111618.09
Xingcheng Liu26617.47
Lie-Liang Yang31623163.43