Receiver Design for the Uplink of Base Station Cooperation Systems employing SC-FDE Modulations
Eurasip Journal on Wireless Communications and Networking Vol. 2015, Nº 1, pp. 1 - 17, January, 2015.
ISSN (print): 1687-1499
ISSN (online): 1687-1472
Journal Impact Factor: 0,805 (in 2013)
Digital Object Identifier: 10.1186/s13638-014-0237-6
The presented paper considers the uplink transmission in Base Station (BS) cooperation schemes where Mobile Terminals (MTs) in adjacent cells share the same physical channel. We consider Single-Carrier with Frequency-Domain Equalization (SC-FDE) combined with iterative frequency-domain receivers based on the Iterative Block Decision Feedback Equalization (IB-DFE). We study the quantization requirements when sending the received signals, from different MTs, at different BSs to a central unit that performs the separation of different MTs using iterative frequency-domain receivers. Our performance results show that a relatively coarse quantization, with only 4 bits in the in-phase and quadrature components of the complex envelope already allows close-to-optimum macro-diversity gains, as well as an efficient separation of the transmitted signals associated with each MT.