Design and analysis of LDPC codes for joint source-channel decoding of two correlated sensors

This study is concerned with the design of ensembles of systematic low-density parity-check (LDPC) codes to increase the lifetime of wireless sensors by taking advantage of the inherent correlation between the transmitted data of the sensors. The authors consider two correlated sensors where the dat...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	IET communications Ročník 12; číslo 8; s. 1003 - 1010
Hlavní autoři:	Khas, Mohamad, Saeedi, Hamid, Asvadi, Reza
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	The Institution of Engineering and Technology 15.05.2018
Témata:	asymptotic performance analysis combined source‐channel coding component LDPC decoders correlated sensors decoding decoding thresholds extrinsic information transfer charts independent channels inherent correlation joint source‐channel decoding low‐density parity‐check codes parity check codes point‐to‐point communications Research Article wireless sensors parity check codes correlated sensors inherent correlation combined source-channel coding point-to-point communications decoding thresholds decoding wireless sensors extrinsic information transfer charts component LDPC decoders low-density parity-check codes asymptotic performance analysis joint source-channel decoding independent channels
ISSN:	1751-8628, 1751-8636
On-line přístup:	Získat plný text
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	This study is concerned with the design of ensembles of systematic low-density parity-check (LDPC) codes to increase the lifetime of wireless sensors by taking advantage of the inherent correlation between the transmitted data of the sensors. The authors consider two correlated sensors where the data is encoded independently at each sensor through a systematic LDPC encoder and sent over two independent channels. At the receiver, a joint source-channel decoder consisting of two component LDPC decoders is considered where the encoded bits at the output of each component decoder are used as the a priori information at the other decoder. The authors first perform asymptotic performance analysis using the concept of extrinsic information transfer (EXIT) charts. Then, the developed modified EXIT charts are used to design ensembles for different values of correlation. Our results show that as the average check node degree of the designed ensembles grow, the decoding thresholds corresponding to the designed ensembles approach the theoretical limit. Finite block-length performance evaluation indicates that for larger values of correlation, deploying the designed ensembles through the joint decoder can almost double the sensor's lifetime without increasing the complexity of the encoder.
ISSN:	1751-8628 1751-8636
DOI:	10.1049/iet-com.2017.1084