Ahmed, Qasim Zeeshan; Aissa, Sonia; Alouini, Mohamed-Slim; Park, Kihong(IEEE Transactions on Vehicular Technology, Institute of Electrical and Electronics Engineers (IEEE), 2013-07-04)[Article]
This paper investigates and compares the performance
of wireless sensor networks where sensors operate on
the principles of cooperative communications. We consider a
scenario where the source transmits signals to the destination
with the help of L sensors. As the destination has the capacity of
processing only U out of these L signals, the strongest U signals
are selected while the remaining (L?U) signals are suppressed.
A preprocessing block similar to channel-shortening is proposed
in this contribution. However, this preprocessing block employs
a rank-reduction technique instead of channel-shortening. By
employing this preprocessing, we are able to decrease the
computational complexity of the system without affecting the
bit error rate (BER) performance. From our simulations, it can
be shown that these schemes outperform the channel-shortening
schemes in terms of computational complexity. In addition,
the proposed schemes have a superior BER performance as
compared to channel-shortening schemes when sensors employ
fixed gain amplification. However, for sensors which employ
variable gain amplification, a tradeoff exists in terms of BER
performance between the channel-shortening and these schemes.
These schemes outperform channel-shortening scheme for lower
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