Download Advances in Mobile and Wireless Communications: Views of the by Gerhard Bauch, Katsutoshi Kusume (auth.), Frigyes István, PDF

By Gerhard Bauch, Katsutoshi Kusume (auth.), Frigyes István, János Bitó, Péter Bakki (eds.)

This quantity provides the main interesting result of the cellular and instant verbal exchange Summit, held 2007 in Budapest. It comprises labored out contributions from all components of instant communications, actual layer, entry tools, innovations and applied sciences, networks, purposes and systems.

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Extra info for Advances in Mobile and Wireless Communications: Views of the 16th IST Mobile and Wireless Communication Summit

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Multiuser diversity arises when a large number of users with independently fading channels are present, and hence it is likely that a user or multiple users experience high channel gain in any given time/frequency slot [15]. The objective of channel-aware scheduling (scheduling with channel state information available at the transmitter) is to maximize system throughput by allocating radio resources to the user or the multiple users that experience the highest channel gains. In this context, several suboptimal but simplified algorithms to schedule a subset of users have been proposed in the literature for the case of multiuser multiple antenna downlink with single receive antenna users [7,8,9].

Those properties are taken into consideration in our proposals of restricted random interleavers and AB interleavers. We showed that our proposed interleavers outperform straightforward interleaving approaches such as s-random congruential interleavers particularly when the number of required interleavers increases where the congruential construction rule fails to provide mutual randomness between different interleavers. Using intermediate steps in the construction of the UMTS turbo code internal interleaver with modified read out process allows to use turbo codes and zigzag codes within the same framework with minimum hardware modifications.

Crozier, J. Lodge, P. Guinand, and A. Hunt, “Performance of turbo-codes with relative prime and golden interleaving strategies,” in International Mobile Satellite Conference, pp. 268–275, 1999. 20. D. Divsalar and F. Pollara, “Multiple turbo codes for deep-space communications,” TDA Progress Report 42-121, May 1995. 21. T. Sohdoh, N. Nishinaga, and Y. Iwadare, “The new interleaver design of turbo codes for error floor improvement,” in Symposium on Information Theory and its Applications, pp. 13–16, December 1997.

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