A Polar Coding with a Q-Section NBC Property for Managing Phase Ambiguity and PAPR in Multi-Carrier Communications
Journal
IEEE Communications Letters
Journal Volume
25
Journal Issue
11
Pages
3449-3453
Date Issued
2021
Author(s)
Abstract
For an orthogonal frequency division multiplexing (OFDM) communication system which requires channel estimation for each sub-carrier without using pilot signals, there may exist the problem of phase ambiguity. By extending the conventional concept of noncoherent block coding (NBC), we propose a Q-section polar code that has the NBC property in such a way that each codeword is divided into Q sections and reversing the code bits in some sections results in another codeword which is encoded by the same desired message. The polar coded OFDM with a Q-section NBC property enables us to solve the problem of phase ambiguity that exists in each sub-carrier. In addition, the Q-section NBC property also enables us to employ the multiple-candidate method for reducing the peak-To-Average-power ratio (PAPR). ? 1997-2012 IEEE.
Subjects
channel estimation
Orthogonal frequency division multiplexing (OFDM)
peak-To-Average power ratio (PAPR)
phase ambiguity
polar codes
Frequency estimation
Orthogonal frequency division multiplexing
Block coding
Code bits
Coded OFDM
Peak to average power ratio
Phase ambiguity
Pilot signals
Polar codes
Sub-carriers
Codes (symbols)
Type
journal article