LSE Precoder for Load Modulated Arrays with Channel Modulation

Bhat, S and Chockalingam, A (2020) LSE Precoder for Load Modulated Arrays with Channel Modulation. In: IEEE Wireless Communications Letters, 9 (8). pp. 1295-1299.

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Abstract

In this letter, we consider novel multiuser precoding techniques suited for load modulated arrays (LMAs) on the downlink, wherein a base station employs an LMA to transmit data to multiple users. For Implementation simplicity, It Is desired that the antenna load Impedance values In the LMA are drawn from a discrete set. For such LMAs with discrete-valued load Impedances, we propose an Iterative precoding algorithm using the least square error (LSE) framework. For the same setting, we also propose a precoding scheme that employs channel modulation (CM) using radio frequency (RF) mirrors In each element of the LMA. This LMA-CM precoding scheme tunes the RF mirrors as well as antenna load modulators such that the Instantaneous constraint of constant hypersphere signaling from a discrete set required for LMAs Is satisfied. Improved distortion and bit error performance of the proposed schemes are reported. © 2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Wireless Communications Letters
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Iterative methods; Mirrors; Modulation, Channel modulation; Discrete sets; Least square errors; Load impedance; Multi-user precoding; Precoding scheme; Radio frequencies; Transmit data, Antennas
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	01 Sep 2020 10:21
Last Modified:	01 Sep 2020 10:21
URI:	http://eprints.iisc.ac.in/id/eprint/66419

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