Shaohan Wu

Works (6)

Updated: July 5th, 2023 15:34

2022 journal article

A Principal-Component Approach to Antenna Impedance Estimation at MISO Receivers

IEEE COMMUNICATIONS LETTERS, 27(1), 288–292.

By: S. Wu*  & B. Hughes n

author keywords: Impedance; Maximum likelihood estimation; Receiving antennas; Training; MISO communication; Antennas; Transmitting antennas; Antenna impedance estimation; maximum-likelihood estimator; eigen-decomposition
TL;DR: This letter study at MISO receivers over Rayleigh fading channels and derive the optimal ML estimator in closed-form, suggesting a computationally efficient, principal-components approach that estimates antenna impedance in real-time and shows sizable improvement against a reference estimator at low SNR. (via Semantic Scholar)
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Sources: Web Of Science, ORCID
Added: November 4, 2022

2022 journal article

Impedance Variation Detection at MISO Receivers

IEEE Communications Letters.

By: S. Wu* 

author keywords: Change detection; generalized likelihood-ratio test; maximum-likelihood estimator; MISO receiver
TL;DR: The derived GLRT detector enjoys a better detection and false alarm trade-off when compared with a well-known, reference detector in simulations, and more transmit diversity significantly improves detection accuracy at a given false alarm rate, especially in slow fading channels. (via Semantic Scholar)
Source: ORCID
Added: September 23, 2022

2021 conference paper

A Hybrid Approach to Joint Estimation of MIMO Channel and Antenna Impedance Matrices

2021 55th Annual Conference on Information Sciences and Systems (CISS).

By: S. Wu* 

Contributors: S. Wu* 

author keywords: Impedance Estimation; Channel Estimation; Maximum-Likelihood Estimator; Transmit Diversity
TL;DR: This paper derives joint MAP/ML estimators for channel and impedance matrices in closed-form and develops a design principle leveraging a trade-off between channel and impediment estimation, which depends on transmit diversity. (via Semantic Scholar)
Source: ORCID
Added: September 14, 2022

2018 conference paper

A Hybrid Approach to Joint Estimation of Channel and Antenna impedance

2018 52nd Asilomar Conference on Signals, Systems, and Computers, 1789–1794.

By: S. Wu n  & B. Hughes n

TL;DR: A hybrid approach to joint estimation of channel information and antenna impedance, for single-input, single-output channels, using joint maximum a posteriori and maximum-likelihood (MAP/ML) estimators for channel and impedance over multiple packets is considered. (via Semantic Scholar)
Source: ORCID
Added: March 25, 2020

2018 journal article

Moments of Complex Gaussian Ratios

IEEE Communications Letters, 23(1), 88–91.

By: S. Wu n 

author keywords: Gaussian ratios; mean; absolute moments
TL;DR: The mean of general CGR is calculated in a closed form and it is proved that the mean-square and higher order absolute moments are unbounded in general. (via Semantic Scholar)
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Source: ORCID
Added: January 24, 2019

2018 article

Training-Based Joint Channel and Antenna Impedance Estimation

2018 52ND ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS (CISS).

By: S. Wu n  & B. Hughes n

author keywords: Channel Estimation; Impedance Estimation; Maximum-Likelihood Estimation; Training Sequences
TL;DR: It is suggested that antenna impedance can be accurately estimated, in exchange for a small, controlled increase in channel estimation error, and maximum-likelihood estimators for the channel and impedance are derived. (via Semantic Scholar)
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Sources: Web Of Science, ORCID
Added: August 6, 2018

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