scholarly journals Collision Detection in Wireless Sensor Networks Through Pseudo-Coded ON-OFF Pilot Periods per Packet: A Novel Low-Complexity and Low-Power Design Technique

2015 ◽  
Vol 8 (3) ◽  
Author(s):  
Fawaz Alassery ◽  
Walid Ahmed ◽  
Mohsen Sarraf ◽  
Victor Lawrence
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Low Power ◽  
Collision Detection ◽  
Low Power Design ◽  
Low Complexity ◽  
Wireless Sensor ◽  
Design Technique

scholarly journals Low Power Decoding of LDPC Codes

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Mohamed Ismail ◽  
Imran Ahmed ◽  
Justin Coon
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Low Power ◽  
Ldpc Codes ◽  
Low Complexity ◽  
Efficient Solutions ◽  
Design Flow ◽  
Wireless Sensor ◽  
Battery Life ◽  
Ldpc Decoding

Wireless sensor networks are used in many diverse application scenarios that require the network designer to trade off different factors. Two such factors of importance in many wireless sensor networks are communication reliability and battery life. This paper describes an efficient, low complexity, high throughput channel decoder suited to decoding low-density parity-check (LDPC) codes. LDPC codes have demonstrated excellent error-correcting ability such that a number of recent wireless standards have opted for their inclusion. Hardware realisation of practical LDPC decoders is a challenging area especially when power efficient solutions are needed. Implementation details are given for an LDPC decoding algorithm, termed adaptive threshold bit flipping (ATBF), designed for low complexity and low power operation. The ATBF decoder was implemented in 90 nm CMOS at 0.9 V using a standard cell design flow and was shown to operate at 250 MHz achieving a throughput of 252 Gb/s/iteration. The decoder area was 0.72 mm2 with a power consumption of 33.14 mW and a very small energy/decoded bit figure of 1.3 pJ.

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