Low-complexity and blind receiver in-phase/quadrature imbalances compensation and estimation in the frequency domain for high-order modulation formats-Reference-Cited by-同舟云学术

Low-complexity and blind receiver in-phase/quadrature imbalances compensation and estimation in the frequency domain for high-order modulation formats

Published:2022-07-19 Issue:16 Volume:30 Page:28414
ISSN:1094-4087
Container-title:Optics Express
language:en
Short-container-title:Opt. Express

Author:

Chai Jia¹,Liang Junpeng²,Chen Xue¹^ORCID,Yang Tao¹^ORCID,You Jialin¹,Wang Weiming²

Affiliation:

1. Beijing University of Posts and Telecommunications

2. ZTE Corporation, Shenzhen

Abstract

A frequency domain (FD) 4×2 multi-input and multi-output (MIMO) equalizer based on radially directed equalizer is proposed to compensate receiver in-phase/quadrature (IQ) imbalances of M-ary quadrature amplitude modulation signals. This algorithm has a significantly lower complexity compared with a conventional time-domain 4×2 MIMO equalizer. Furthermore, each of imperfection estimations is derived from the converged discrete frequency response of the FD 4×2 MIMO equalizer. The simulation and experimental results indicated that the receiver (Rx) IQ imbalances were fully compensated by the proposed equalizer and precisely estimated by estimators, even for long-haul transmission with Rx IQ imbalances varying over a wide range.

Funder

National Natural Science Foundation of China

ZTE's Industry, University and Research Cooperation Foundation

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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