Scrambled Coded Multiple Access, Variations and Improvements

被引：0
|
作者：
Lee, Lin-nan [1 ]
Eroz, Mustafa [1 ]
Becker, Neal [1 ]
Kay, Stan [1 ]
Liau, Victor [1 ]
Chen, Liping [1 ]
Seshadri, Rohit [1 ]
机构：
[1] Hughes Network Syst, Germantown, MD 20876 USA
来源：
2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM) | 2018年
关键词：
scrambled coded multiple access; interleave division multiple access; low density parity check codes; asynchronous; spreading; multiuser detection; extrinsic information; successive interference cancellation;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A family of new non-orthogonal multiple access techniques named Scrambled Coded Multiple Access (SCMA) is described. It allows different users of a communications system to efficiently share the same bandwidth by using specific scramblers to separate user bursts. SCMA technology is designed for satellite communications with extremely small antenna terminals for potential applications such as asset tracking, sensor networking, and smart grid; and also for latency reduction. The latest variation, Asynchronous Scrambled Coded Multiple Access (A-SCMA) on the other hand, not only removes the need for time-slot synchronization and precise power control, but also offers an unprecedented system throughput of more than 4 bits/symbol at a modest per user signal to noise ratio (SNR).
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页数：7
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