Journal
IEEE TRANSACTIONS ON COMMUNICATIONS
Volume 64, Issue 7, Pages 2913-2924Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2016.2574867
Keywords
Broadcast channel; capacity; multiple-input single-output; delayed CSIT
Funding
- National Science Foundation [CAREER-0953117, CCF-1161720, NETS-1161904]
- Air Force Office of Scientific Research Young Investigator Program Award
- Office of Naval Research award [N000141310094]
- Qualcomm Innovation Fellowship
- Division of Computing and Communication Foundations
- Direct For Computer & Info Scie & Enginr [1408639] Funding Source: National Science Foundation
Ask authors/readers for more resources
We consider the problem of multiple-input single-output broadcast channels with Rayleigh fading where the transmitter has access to delayed knowledge of the channel state information. We first characterize the capacity region of this channel with two users to within constant number of bits for all values of the transmit power. The proposed signaling strategy utilizes the delayed knowledge of the channel state information and the previously transmitted signals, in order to create a signal of common interest for both receivers. This signal would be the quantized version of the summation of the previously transmitted signals. A challenge that arises in deriving the result for finite signal-to-noise ratio regimes is the correlation that exists between the quantization noise and the signal. To guarantee the independence of quantization noise and signal, we extend the framework of lattice quantizers with dither together with an interleaving step. For converse, we use the fact that the capacity region of this problem is upper bounded by the capacity region of a physically degraded broadcast channel with no channel state information where one receiver has two antennas. Then, we derive an outer bound on the capacity region of this degraded broadcast channel. Finally, we show how to extend our results to obtain the approximate capacity of the K-user multiple-input single-output broadcast channel with delayed knowledge of the channel state information at the transmitter to within 2 log(2)(K + 2) bits/s/Hz.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available