Computer Science – Information Theory
Scientific paper
2007-10-08
Computer Science
Information Theory
8 pages, 4 figures, presented at Forty-Fifth Annual Allerton Conference on Communication, Control and Computing, September 200
Scientific paper
We analyze a slow-fading interference network with MN non-cooperating single-antenna sources and M non-cooperating single-antenna destinations. In particular, we assume that the sources are divided into M mutually exclusive groups of N sources each, every group is dedicated to transmit a common message to a unique destination, all transmissions occur concurrently and in the same frequency band and a dedicated 1-bit broadcast feedback channel from each destination to its corresponding group of sources exists. We provide a feedback-based iterative distributed (multi-user) beamforming algorithm, which "learns" the channels between each group of sources and its assigned destination. This algorithm is a straightforward generalization, to the multi-user case, of the feedback-based iterative distributed beamforming algorithm proposed recently by Mudumbai et al., in IEEE Trans. Inf. Th. (submitted) for networks with a single group of sources and a single destination. Putting the algorithm into a Markov chain context, we provide a simple convergence proof. We then show that, for M finite and N approaching infinity, spatial multiplexing based on the beamforming weights produced by the algorithm achieves full spatial multiplexing gain of M and full per-stream array gain of N, provided the time spent "learning'' the channels scales linearly in N. The network is furthermore shown to "crystallize''. Finally, we characterize the corresponding crystallization rate.
Bölcskei Helmut
Thukral Jatin
No associations
LandOfFree
Distributed spatial multiplexing with 1-bit feedback does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Distributed spatial multiplexing with 1-bit feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distributed spatial multiplexing with 1-bit feedback will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-544272