The University of Southampton
University of Southampton Institutional Repository

Dynamic DS-CDMA aided by successive interference cancellation for massive grant-free multiple-access

Dynamic DS-CDMA aided by successive interference cancellation for massive grant-free multiple-access
Dynamic DS-CDMA aided by successive interference cancellation for massive grant-free multiple-access

We introduce a dynamic DS-CDMA (DyDS-CDMA) scheme for supporting massive grant-free multiple-Access (mGFMA), where each base-station (BS) or access point (AP) with limited degrees of freedom is expected to control a massive number of devices of ultra densely deployed. We assume that devices become active to transmit data on the basis of time-slots, and during a time-slot, each of devices activates independently and following a common activation probability. A low-complexity detector based on minimum mean-square error and successive interference cancellation, referred to as the MMSE-SICD, is proposed for signal detection in DyDS-CDMA systems. Assuming ideal active device identification and ideal channel estimation of active device, in this paper, we focus on the potential performance achievable by the DyDS-CDMA systems employing the MMSESICD. Our studies reveal that the DyDS-CDMA aided by the MMSE-SICD is high-efficiency for operation in mGFMA environments. Near single-user performance is achievable, when the average number of active devices per time-slot reaches two times of the system's degrees-of-freedom, and hence, the number of active devices of a time-slot may be much higher than two timing the system's degrees-of-freedom.

DS-CDMA, grant-free multiple-Access, interference cancellation, Internet of things, massive connectivity, non-orthogonal multiple-Access, ultra-dense deployment
IEEE
Zhang, Jiatian
ee0c77aa-6bcd-4e08-8ce1-d5bbcd600840
Pan, Peng
56ea394e-58af-4d6f-8bd5-d08784d3a7f8
Yang, Lie Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Zhang, Jiatian
ee0c77aa-6bcd-4e08-8ce1-d5bbcd600840
Pan, Peng
56ea394e-58af-4d6f-8bd5-d08784d3a7f8
Yang, Lie Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7

Zhang, Jiatian, Pan, Peng and Yang, Lie Liang (2018) Dynamic DS-CDMA aided by successive interference cancellation for massive grant-free multiple-access. In 2018 10th International Conference on Wireless Communications and Signal Processing, WCSP 2018. IEEE.. (doi:10.1109/WCSP.2018.8555901).

Record type: Conference or Workshop Item (Paper)

Abstract

We introduce a dynamic DS-CDMA (DyDS-CDMA) scheme for supporting massive grant-free multiple-Access (mGFMA), where each base-station (BS) or access point (AP) with limited degrees of freedom is expected to control a massive number of devices of ultra densely deployed. We assume that devices become active to transmit data on the basis of time-slots, and during a time-slot, each of devices activates independently and following a common activation probability. A low-complexity detector based on minimum mean-square error and successive interference cancellation, referred to as the MMSE-SICD, is proposed for signal detection in DyDS-CDMA systems. Assuming ideal active device identification and ideal channel estimation of active device, in this paper, we focus on the potential performance achievable by the DyDS-CDMA systems employing the MMSESICD. Our studies reveal that the DyDS-CDMA aided by the MMSE-SICD is high-efficiency for operation in mGFMA environments. Near single-user performance is achievable, when the average number of active devices per time-slot reaches two times of the system's degrees-of-freedom, and hence, the number of active devices of a time-slot may be much higher than two timing the system's degrees-of-freedom.

Full text not available from this repository.

More information

Published date: 30 November 2018
Venue - Dates: 10th International Conference on Wireless Communications and Signal Processing, WCSP 2018, Hangzhou, China, 2018-10-18 - 2018-10-20
Keywords: DS-CDMA, grant-free multiple-Access, interference cancellation, Internet of things, massive connectivity, non-orthogonal multiple-Access, ultra-dense deployment

Identifiers

Local EPrints ID: 427612
URI: http://eprints.soton.ac.uk/id/eprint/427612
PURE UUID: 288cbaf8-aeb4-47a5-9406-62599e0418da
ORCID for Lie Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327

Catalogue record

Date deposited: 24 Jan 2019 17:30
Last modified: 20 Jul 2019 01:12

Export record

Altmetrics

Contributors

Author: Jiatian Zhang
Author: Peng Pan
Author: Lie Liang Yang ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×