Proceedings ArticleDOI
An algorithm for distributed cooperative precoder selection in a cellular network
J Vinosh Babu James,Bhaskar Ramamurthi,V Ganesh +2 more
- pp 1-5
Reads0
Chats0
TLDR
A distributed algorithm is proposed that independently determines the precoder which mitigates the interference to the neighboring cell edge users without compromising on the in-cell performance.Abstract:
The performance in the downlink of a reuse 1:1 cellular wireless system is severely degraded due to the interference originating from adjacent cell sites. Even the spectral efficiency gains due to MIMO vanish for cell-edge users who are interference limited. Cooperative MIMO, which involves coordination amongst base stations serving adjacent cell-sites, is a promising technique to address the co-channel interference problem. In this paper, we study cooperation in the downlink of an interference channel. The basestations cooperate amongst themselves to arrive separately at precoding strategies which improve the signal-to-interference-and-noise ratio of the cell-edge users and hence the throughput. We propose a distributed algorithm that independently determines the precoder which mitigates the interference to the neighboring cell edge users without compromising on the in-cell performance. This algorithm requires only modest levels of on-air-feedback and information exchange among the basestations on the backhaul networks.read more
References
More filters
Journal ArticleDOI
Interference Alignment and Degrees of Freedom of the $K$ -User Interference Channel
Viveck R. Cadambe,Syed A. Jafar +1 more
TL;DR: For the fully connected K user wireless interference channel where the channel coefficients are time-varying and are drawn from a continuous distribution, the sum capacity is characterized as C(SNR)=K/2log (SNR)+o(log( SNR), which almost surely has K/2 degrees of freedom.
Journal ArticleDOI
Iterative water-filling for Gaussian vector multiple-access channels
TL;DR: An efficient numerical algorithm to compute the optimal input distribution that maximizes the sum capacity of a Gaussian multiple-access channel with vector inputs and a vector output is proposed.
Journal ArticleDOI
Limited feedback unitary precoding for spatial multiplexing systems
David J. Love,Robert W. Heath +1 more
TL;DR: This correspondence proposes a quantized precoding system where the optimal precoder is chosen from a finite codebook known to both receiver and transmitter and performs close to optimal unitary precoding with a minimal amount of feedback.
Proceedings ArticleDOI
Approaching the Capacity of Wireless Networks through Distributed Interference Alignment
TL;DR: Examples of iterative algorithms that utilize the reciprocity of wireless networks to achieve interference alignment with only local channel knowledge at each node are provided, providing numerical insights into the feasibility of interference alignment that are not yet available in theory.
Journal ArticleDOI
Interference cancellation for cellular systems: a contemporary overview
TL;DR: How current and future trends increases the need for and viability of multi-user receivers for both the uplink, where many asynchronous users are simultaneously detected, and the downlink, where users are scheduled and largely orthogonalized is discussed.
Related Papers (5)
On Base Station Cooperation Schemes for Downlink Network MIMO under a Constrained Backhaul
Patrick Marsch,Gerhard Fettweis +1 more