Capacity of a cellular system on the downlink is significantly limited by inter-cell interference (ICI), especially at the cell boundary. Multi-cell joint processing can mitigate ICI and thereby greatly improve performance and spectral efficiency of cellular systems. This paper considers a cellular system with base
station (BS) cooperation on the downlinkand propose an adaptive power allocation scheme to compensate the channel fading effect. Further, a BS cooperation transmission method is proposed to remove ICI experienced by cell boundary users. The method is inner joint distributed space-time coding (IN-J-DSTC) BS cooperation transmission with pre-coding. Simulation results show that the bit error rate (BER) performance can be significantly improved by effectively suppressing ICI with the proposed BS cooperation schemes and by allocating transmit power adaptively between the source and the cooperative BS according to the channels between them and the destination.
AI Ting, WU Zhuo
. Power Allocation and Interference Mitigation Schemes for Cellular System with Base Station Cooperation on the Downlink[J]. Journal of Shanghai University, 2013
, 19(3)
: 259
-265
.
DOI: 10.3969/j.issn.1007-2861.2013.03.009
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