Sciweavers

Share
GLOBECOM
2007
IEEE

A Simple Multiuser and Single-User Dual-Mode Downlink System with Limited Feedback

9 years 19 days ago
A Simple Multiuser and Single-User Dual-Mode Downlink System with Limited Feedback
— Limited feedback systems that simultaneously transmit to multiple users are noise power limited at low SNR and interference power limited at high SNR. Specifically, there is a sum rate upper bound such that increasing the transmit power alone cannot surpass. In this paper, we propose a dual-mode system that selects between single user mode and multiuser mode. The mobile determines its preferred transmission mode by a simple threshold rule of its SINR. Judiciously combining mobiles’ feedback, the base station with MT transmit antennas chooses the better communication mode. It is shown that this proposed system asymptotically achieves unbounded capacity growth when increasing the number of mobiles or when increasing the SNR, without requring extra feedback bits. We show the asymptotically preferable mode as the number of users and/or SNR increases. Lastly, we use computer simulations to verify our findings.
Chun Kin Au-Yeung, Seung Young Park, David James L
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where GLOBECOM
Authors Chun Kin Au-Yeung, Seung Young Park, David James Love
Comments (0)
books