TR2007-049

Low Complexity Rake Receivers in Ultra-Wideband Channels


    •  Cassioli, D., Win, M.Z., Vatalaro, F., Molisch, A.F., "Low Complexity Rake Receivers in Ultra-Wideband Channels", IEEE Transactions on Wireless Communications, Vol. 6, No. 4, pp. 1265-1275, April 2007.
      BibTeX TR2007-049 PDF
      • @article{Cassioli2007apr,
      • author = {Cassioli, D. and Win, M.Z. and Vatalaro, F. and Molisch, A.F.},
      • title = {Low Complexity Rake Receivers in Ultra-Wideband Channels},
      • journal = {IEEE Transactions on Wireless Communications},
      • year = 2007,
      • volume = 6,
      • number = 4,
      • pages = {1265--1275},
      • month = apr,
      • issn = {1536-1276},
      • url = {https://www.merl.com/publications/TR2007-049}
      • }
  • Research Area:

    Communications

Abstract:

One of the major issues for the design of ultra-wideband (UWB) receivers is the need to recover the signal energy dispersed over many multipath components, while keeping the receiver complexity low. To this aim we consider two schemes for reduces-complexity UWB Rake receivers, both of which combine a subset of the available resolved multipath components. The first method, called partial Rake (PRake), combines theirs/arriving multipath components. the second is known as selective Rake (SRake) and combines the instantaneously strongest multipath components. We evaluate and compare the link performance of these Rake receivers in different UWB channels, whose models are based on extensive propagation measurements. We quantify the effect of the channel characteristics on the receiver performance, analyzing in particular the influence of small-scale fading statistics. We find that for dense channels the performance of the simpler PRake receiver is almost as food as that of the SRake receiver, even for a small number of fingers. In sparse channels, however, the SRake outperforms the PRake significantly. We also show that for a fixed transmitted energy there is an optimum transmission bandwidth.

 

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