Low complexity Rake receivers in ultra-wideband channels

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Low complexity Rake receivers in ultra-wideband channels. / Cassioli, Dajana; Win, Moe Z.; Vatalaro, Francesco; Molisch, Andreas.

In: IEEE Transactions on Wireless Communications, Vol. 6, No. 4, 2007, p. 1265-1275.

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Cassioli, Dajana ; Win, Moe Z. ; Vatalaro, Francesco ; Molisch, Andreas. / Low complexity Rake receivers in ultra-wideband channels. In: IEEE Transactions on Wireless Communications. 2007 ; Vol. 6, No. 4. pp. 1265-1275.

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TY - JOUR

T1 - Low complexity Rake receivers in ultra-wideband channels

AU - Cassioli, Dajana

AU - Win, Moe Z.

AU - Vatalaro, Francesco

AU - Molisch, Andreas

PY - 2007

Y1 - 2007

N2 - 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 reduced-complexity UWB Rake receivers, both of which combine a subset of the available resolved multipath components. The first method, called partial Rake (PRake), combines the first 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 good 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.

AB - 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 reduced-complexity UWB Rake receivers, both of which combine a subset of the available resolved multipath components. The first method, called partial Rake (PRake), combines the first 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 good 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.

KW - propagation channel

KW - stochastic tapped-delay line model

KW - UWB

KW - partial Rake

KW - selective Rake

KW - reduced complexity Rake receivers

U2 - 10.1109/TWC.2007.348323

DO - 10.1109/TWC.2007.348323

M3 - Article

VL - 6

SP - 1265

EP - 1275

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 4

ER -