TR2009-077

Unified Analysis of Linear Block Precoding for Distributed Antenna Systems


    •  Koike-Akino, T.; Molisch, A.F.; Tao, Z.; Orlik, P.V.; Kuze, T., "Unified Analysis of Linear Block Precoding for Distributed Antenna Systems", IEEE Global Telecommunications Conference (GLOBECOM), ISSN: 1930-529X, November 2009, pp. 1-6.
      BibTeX Download PDF
      • @inproceedings{Koike-Akino2009nov,
      • author = {Koike-Akino, T. and Molisch, A.F. and Tao, Z. and Orlik, P.V. and Kuze, T.},
      • title = {Unified Analysis of Linear Block Precoding for Distributed Antenna Systems},
      • booktitle = {IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2009,
      • pages = {1--6},
      • month = nov,
      • issn = {1930-529X},
      • url = {http://www.merl.com/publications/TR2009-077}
      • }
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  • Research Areas:

    Electronics & Communications, Wireless Communications


Block transmission with cyclic prefix is a promising technique to realize high-speed data rates in frequency selective fading channels. Many popular linear precoding schemes, including orthogonal frequency-division multiplexing (OFDM), single-carrier (SC) block transmission, and time-reversal (TR), can be interpreted as such a block transmission. This paper presents a unified performance analysis which shows how the optimal precoding strategy depends on the receiver type and the optimization criterion (capacity and mean-square error). We analyze three variants of TR methods (based on maximum-ratio combining, equal-gain combining and selective combining) and two-types of pre-equalization methods (zero-forcing and minimum mean-square error). As one application of our framework, we derive optimal power control for OFDM in the presence of interference limitation for distributed antenna systems; we find that without power control, OFDM does not have any capacity advantage over SC transmissions. When comparing SC and TR, we find that for single-antenna systems at high SNRs, SC has a capacity advantage; however, TR performs better in the low SNR regime. For multiple-antenna systems, TR always provides higher capacity, and the capacity of TR can approach that of optimal precoders with a number of distributed antennas.