Title :
A two-stage DPCM scheme for wireless sensor networks
Author :
Luo, Huiyu ; Tong, Yu-Ching ; Pottie, Gregory
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
We implement a two-stage DPCM coding scheme for wireless sensor networks. The scheme consists of temporal and spatial stages that compress data by making predictions based on samples from the past and helping sensors. It continuously monitors the additional gain provided by samples from other sensors, and therefore can be combined with data-centric routing algorithms for joint compression/routing optimization. Backward ε-NLMS adaptation is used to better track changing environments and avoid coefficient transmissions. Several simulations are conducted to demonstrate the effectiveness of this coding scheme.
Keywords :
data compression; differential pulse code modulation; encoding; least mean squares methods; sampling methods; telecommunication network routing; wireless sensor networks; DPCM coding; backward ε-NLMS adaptation; data compression; predictions; routing optimization; samples; spatial stage; temporal stage; two-stage DPCM scheme; wireless sensor networks; Communication networks; Costs; Energy consumption; Monitoring; Relays; Routing; Sensor fusion; Sensor phenomena and characterization; Video coding; Wireless sensor networks;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415796
