Differential spatial multiplexing

TitleDifferential spatial multiplexing
Publication TypeConference Paper
Year of Publication2004
AuthorsCheung, S. K., and R. Schober
Conference NameWireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE
Pagination1861 - 1866 Vol.3
Date Publishedmar.
Keywordsantenna arrays, channel state information, data rate transmission, decision-feedback differential detection, decoding, decoding complexity, differential detection, differential space-time coding, differential spatial multiplexing, filtering theory, group interference suppression filter, interference suppression, Internet, multiple transmit antennas, multiplexing, radio receivers, radiofrequency interference, space-time codes, transmitting antennas

In this paper, we present a novel differential space-time (DST) architecture which is well suited for high data-rate applications but requires only a low decoding complexity. Multiple transmit antennas are divided into groups and DST encoding is applied individually to each group. Instead of using the optimum joint-group decoding approach, the receiver combines group interference suppression (GIS) and decision-feedback differential detection (DF-DD) to reduce the decoding complexity. By taking advantage of the differential encoding at the transmitter, the GIS filter can be calculated without knowledge of channel state information (CSI). In addition, both the GIS filter computation and the detection scheme are robust against frequency offsets and phase noise.


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