Rateless transmission of polar codes with information unequal error protection

Líu, Hao; Liu, Aijun; Zhang, Ying Xian; Cheng, Feng Yi

doi:10.1049/iet-com.2018.6194

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Wz-uep Codes With Two Importance Classes1

Introduction1

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2024

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Cited by 2 publications

(2 citation statements)

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“…The parameters related to the LDPC codes are given as (i) Φ (1) 30 . The degree distribution function of the encoded symbols in [4] is considered and given by Ω(x) = 0.0080x + 0.4936x 2 + 0.1662x 3 + 0.0726x 4 + 0.0826x 5 + 0.0561x 8 + 0.0372x 9 + 0.0556x 19 + 0.0250x 64 + 0.0031x 66 .…”

Section: Wz-uep Codes With Two Importance Classesmentioning

confidence: 99%

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Weighted zigzag decodable fountain codes for unequal error protection

et al. 2022

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Section: Wz-uep Codes With Two Importance Classesmentioning

confidence: 99%

“…Channel codes with unequal error protection (UEP) property were first studied in [15]. Since then, different UEP codes have been designed with LDPC codes [16,17], Reed-Muller codes [18] and Polar codes [19,20].…”

Section: Introductionmentioning

confidence: 99%

Weighted zigzag decodable fountain codes for unequal error protection

et al. 2022

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Expanding-Window Zigzag Decodable Fountain Codes for Scalable Multimedia Transmission

Zhao,

Zhang,

Lau

et al. 2024

ACM Trans. Multimedia Comput. Commun. Appl.

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In this paper, we present a coding method called expanding-window zigzag decodable fountain code with unequal error protection property (EWF-ZD UEP code) to achieve scalable multimedia transmission. The key idea of the EWF-ZD UEP code is to utilize bit-shift operation and expanding-window strategy to improve the decoding performance of the high-priority data without performance deterioration of the low-priority data. To provide more protection for the high-priority data, we precode the different importance level using LDPC codes of varying code rates. The generalized variable nodes of different importance levels are further grouped into several windows. Each window is associated with a selection probability and a bit-shift distribution. The combination of bit-shift and symbol exclusive-or operations is used to generate an encoded symbol. Theoretical and simulation results on input symbols of two importance levels reveal that the proposed EWF-ZD UEP code exhibits UEP property. With a small bit shift, the decoding delay for recovering high-priority input symbols is decreased without degrading the decoding performance of the low-priority input symbols. Moreover, according to the simulation results on scalable video coding, our scheme provides better basic video quality at a lower proportion of received symbols compared to three state-of-art UEP fountain codes.

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Rateless transmission of polar codes with information unequal error protection

Cited by 2 publications

References 24 publications

Weighted zigzag decodable fountain codes for unequal error protection

Weighted zigzag decodable fountain codes for unequal error protection

Expanding-Window Zigzag Decodable Fountain Codes for Scalable Multimedia Transmission

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