NDLI: Performance analysis of LT codes and BCH codes in RF and FSO Wireless Sensor Networks

Content Provider	IEEE Xplore Digital Library
Author	Nayak, A.
Copyright Year	2014
Description	Author affiliation: Dept. of Electron. & Commun. Eng., PES Inst. of Technol., Bangalore, India (Nayak, A.)
Abstract	Free Space Optical (FSO) Wireless Sensor Networks (WSN) are immune to electromagnetic interference, license-free and are characterized by high bandwidth and ease of deployment. They face a major drawback in turbulent atmospheres. So, we consider hybrid FSO/RF energy-aware WSN with reliable data communication using ECC (Error Control Coding) methods. LT codes are a class of rateless codes used for recovering data from the transmitted symbols, which are prone to erasure. They are normally applied for packet recovery in high packet loss scenarios. In this paper, we implement LT codes for Forward Error Correction (FEC). We consider BPSK subcarrier intensity modulated FSO communication where a method of discarding weak symbols received, is employed with an optimal erasure zone as a pre-processing stage in LT decoder. We determine the optimal symbol-erasure zone and also impose an upper bound on BPSK threshold. The performances of LT codes and BCH codes are analysed for FSO and RF channel under different atmospheric conditions and link ranges. We consider energy consumption per bit as a performance metric for comparison. The proposed method for LT codes was observed to be more energy-efficient than BCH code in highly turbulent atmospheric conditions.
Starting Page	87
Ending Page	92
File Size	1545427
Page Count	6
File Format	PDF
ISBN	9781479930784
e-ISBN	9781479930807
DOI	10.1109/ICACCI.2014.6968562
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-24
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power demand Binary phase shift keying Free Space Optics Wireless sensor network Wireless sensor networks Luby Transform codes Erasure zone Atmospheric turbulence Bit rate BPSK threshold Energy efficiency RF channel Error correction codes
Content Type	Text
Resource Type	Article

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