Joint Source-Channel Polarization With Side Information

As an extension of source polarization and channel polarization, this paper considers joint source-channel polarization, which results in a joint source-channel coding (JSCC) scheme using a quasi-uniform systematic polar code (SPC). In this JSCC scheme, the source with side information is encoded as...

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Bibliographic Details
Published in:IEEE access 2018-01, Vol.6, p.7340-7349
Main Authors: Jin, Liqiang, Yang, Hongwen
Format: Article
Language:English
Subjects:
Coding
Decoding
Entropy
Indexes
joint source-channel coding
Joint source-channel polarization
Parity
Polarization
side information
Source coding
systematic polar codes
Systematics
Wireless sensor networks
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Summary:As an extension of source polarization and channel polarization, this paper considers joint source-channel polarization, which results in a joint source-channel coding (JSCC) scheme using a quasi-uniform systematic polar code (SPC). In this JSCC scheme, the source with side information is encoded as a systematic polar codeword and only parity bits are transmitted through the channel. The indices of systematic bits are quasi-uniform, which enable the source and the channel to be jointly polarized to either a high entropy part or a low entropy part. The analysis reveals that the quasi-uniform SPC cannot be constructed via original polar coding. To solve this problem, additional bit-swap coding is introduced to modify original polar coding and construct this kind of SPCs. The proposed JSCC scheme can asymptotically approach the information-theoretical limit. For the noiseless channel, the proposed scheme is degraded into classic Slepain-Wolf coding or lossless source coding based on parity approach.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2017.2788887