On the Impact of Channel State Information Quantization and Feedback in Practical OFDM Implementation

In Orthogonal Frequency Division Multiplexing (OFDM), channel knowledge can be exploited to implement adaptive solutions based on bit-loading to improve the communication performance. Typically, channel estimation is performed at the receiver, with the resulting information being sent back to the tr...

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Bibliographic Details
Published inIEEE communications letters Vol. 28; no. 2; pp. 278 - 282
Main Authors Petroni, Andrea, Scarano, Gaetano, Cusani, Roberto, Biagi, Mauro
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
bit-loading
Channel estimation
channel quantization
Drill bits
Feedback
OFDM
Orthogonal Frequency Division Multiplexing
Performance evaluation
Quantization (signal)
Radio frequency
Receivers
Reliability
Symbols
Transmission efficiency
Underwater acoustics
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Summary:In Orthogonal Frequency Division Multiplexing (OFDM), channel knowledge can be exploited to implement adaptive solutions based on bit-loading to improve the communication performance. Typically, channel estimation is performed at the receiver, with the resulting information being sent back to the transmitter to drive bit-loading. However, feedback information is subject to quantization, with the related errors potentially causing unreliable OFDM adaptation. Therefore, we investigate the impact of information quantization on the transmission efficiency, considering different strategies for feedback signaling. Performance are evaluated by referring to four propagation scenarios, that are radio-frequency, optical, powerline and underwater acoustic channels.
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content type line 14
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2023.3340687