Compact Optimal Pilot Design for Channel Estimation in MIMO VLC Systems

Ashok, DR and Chockalingam, A (2019) Compact Optimal Pilot Design for Channel Estimation in MIMO VLC Systems. In: 2019 IEEE Wireless Communications and Networking Conference, WCNC 2019, 15 - 19 April 2019, Marrakesh.

PDF WCNC_2019.pdf - Published Version Restricted to Registered users only Download (671kB) | Request a copy

Abstract

In visible light communication (VLC) systems, like in radio frequency (RF) wireless communication systems, the channel has to be estimated to aid transceiver operations such as data detection and precoding. The LEDs which serve as VLC transmitters have to maintain a desired average intensity as they are simultaneously used for both data transmission as well as lighting, and each LED also has a maximum power constraint. In this paper, we are concerned with channel estimation in VLC systems under these constraints. Specifically, we consider extensions to combinational codes for optimal pilot transmission assuming that the receiver employs a zero-forcing decoder. We construct optimal codes which need much fewer pilot channel uses for channel estimation compared to that needed by combinational codes. We propose a recursive algorithm to construct such codes that are short in length and meet the optimality constraints. The bit error performance achieved using the estimates of the channel obtained using the proposed codes are shown to be quite close to that with perfect channel knowledge. © 2019 IEEE.

Item Type:	Conference Paper
Publication:	IEEE Wireless Communications and Networking Conference, WCNC
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Codes (symbols); Light; Light emitting diodes; Visible light communication, Combinational codes; Data detection; Perfect channel knowledge; Pilot design; Radio frequencies; Recursive algorithms; Visible light communications (VLC); Wireless communication system, Channel estimation
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Others
Date Deposited:	13 Dec 2022 05:11
Last Modified:	13 Dec 2022 05:11
URI:	https://eprints.iisc.ac.in/id/eprint/78336

Actions (login required)

View Item