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Sensors 2011, 11(10), 9887-9903; doi:10.3390/s111009887
Article

Cooperative MIMO Communication at Wireless Sensor Network: An Error Correcting Code Approach

1
 and
2,*
Received: 10 September 2011 / Revised: 13 October 2011 / Accepted: 13 October 2011 / Published: 20 October 2011
(This article belongs to the Special Issue Selected Papers from FGIT 2010)
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Abstract

Cooperative communication in wireless sensor network (WSN) explores the energy efficient wireless communication schemes between multiple sensors and data gathering node (DGN) by exploiting multiple input multiple output (MIMO) and multiple input single output (MISO) configurations. In this paper, an energy efficient cooperative MIMO (C-MIMO) technique is proposed where low density parity check (LDPC) code is used as an error correcting code. The rate of LDPC code is varied by varying the length of message and parity bits. Simulation results show that the cooperative communication scheme outperforms SISO scheme in the presence of LDPC code. LDPC codes with different code rates are compared using bit error rate (BER) analysis. BER is also analyzed under different Nakagami fading scenario. Energy efficiencies are compared for different targeted probability of bit error pb. It is observed that C-MIMO performs more efficiently when the targeted pb is smaller. Also the lower encoding rate for LDPC code offers better error characteristics.
Keywords: cooperative technique; LDPC; BER; MIMO; wireless sensor networks cooperative technique; LDPC; BER; MIMO; wireless sensor networks
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Islam, M.R.; Han, Y.S. Cooperative MIMO Communication at Wireless Sensor Network: An Error Correcting Code Approach. Sensors 2011, 11, 9887-9903.

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