CODING FOR THE UNSOURCED A-CHANNEL WITH ERASURES: THE LINKED LOOP CODE

William W. Zheng, Jamison R. Ebert, Stefano Rini, Jean Francois Chamberland

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

The A-channel is a noiseless multiple access channel in which users simultaneously transmit Q-ary symbols and the receiver observes the set of transmitted symbols, but not their multiplicities. An A-channel is said to be unsourced if, additionally, users' transmissions are encoded across time using a common codebook and decoding of the transmitted messages is done without regard to the identities of the active users [1]. An interesting variant of the unsourced A-channel is the unsourced A-channel with erasures (UACE), in which transmitted symbols are erased with a given independent and identically distributed probability. In this paper, we focus on designing a code that enables a list of transmitted codewords to be recovered despite the erasures of some of the transmitted symbols. To this end, we propose the linked-loop code (LLC), which uses parity bits to link each symbol to the previous M symbols in a tail-biting manner, i.e., the first symbols of the transmission are linked to the last ones. The decoding process occurs in two phases: the first phase decodes the codewords that do not suffer from any erasures, and the second phase attempts to recover the erased symbols using the available parities. We compare the performance of the LLC over the UACE with other codes in the literature and argue for the effectiveness of the construction. Our motivation for studying the UACE comes from its relevance in machine-type communication and coded compressed sensing.

原文English
主出版物標題31st European Signal Processing Conference, EUSIPCO 2023 - Proceedings
發行者European Signal Processing Conference, EUSIPCO
頁面1534-1538
頁數5
ISBN(電子)9789464593600
DOIs
出版狀態Published - 2023
事件31st European Signal Processing Conference, EUSIPCO 2023 - Helsinki, Finland
持續時間: 4 9月 20238 9月 2023

出版系列

名字European Signal Processing Conference
ISSN(列印)2219-5491

Conference

Conference31st European Signal Processing Conference, EUSIPCO 2023
國家/地區Finland
城市Helsinki
期間4/09/238/09/23

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