Title :
On the Channel Estimation Effort for Analog Computation over Wireless Multiple-Access Channels
Author :
Goldenbaum, Mario ; StanÌczak, SÅ‚awomir
Author_Institution :
Fachgebiet Informationstheorie und Theor. Informationstechnik, Tech. Univ. Berlin, Berlin, Germany
Abstract :
This letter studies a multiple-access transmission scheme that exploits interference for an efficient function computation in sensor networks. The central question is how much channel knowledge is generally needed and how the channel estimation effort can significantly be reduced. It is first shown that the channel magnitude at the transmitters is sufficient to achieve the same performance as with full channel state information. It is further shown that for a wide range of fading distributions, no channel state information is needed at the transmitters, provided that the receiver has access to some statistical channel knowledge and is equipped with multiple antennas.
Keywords :
channel estimation; fading channels; wireless sensor networks; analog computation; channel estimation effort; channel magnitude; fading distributions; full channel state information; multiple-access transmission scheme; wireless multiple-access channel; Antennas; Channel estimation; Fading; Interference; Temperature measurement; Wireless communication; Wireless sensor networks; Computation over multiple-access channels; channel knowledge; function estimation; wireless sensor networks;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2014.022314.140005