Abstract
In this paper, we study a feedback bit allocation algorithm with signal-to-leakage plus noise ratio maximizing beamforming (FA-SMB) for distributed antenna systems (DAS) presented in work [1]. We first investigate a scaling law of feedback bits for both the FA-SMB scheme and equal bit allocation. Through this analysis, we confirm that the required number of feedback bits to satisfy the maximum allowable rate gap between DAS with perfect channel state information (CSI) and limited feedback linearly increases with signal-to-noise ratio. Also, it is verified that the FA-SMB scheme saves the feedback bits by up to 30% over the equal bit allocation with the same rate gap at SNR = 40 dB for three-user DAS. Moreover, we show that the FA-SMB scheme substantially reduces the computational complexity compared to exhaustive search. Finally, we provide simulation results to demonstrate the efficacy of the FA-SMB scheme.
Original language | English |
---|---|
Title of host publication | 2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781479944491, 9781479944491 |
DOIs | |
Publication status | Published - 2014 Nov 24 |
Externally published | Yes |
Event | 80th IEEE Vehicular Technology Conference, VTC 2014-Fall - Vancouver, Canada Duration: 2014 Sept 14 → 2014 Sept 17 |
Publication series
Name | IEEE Vehicular Technology Conference |
---|---|
ISSN (Print) | 1550-2252 |
Conference
Conference | 80th IEEE Vehicular Technology Conference, VTC 2014-Fall |
---|---|
Country/Territory | Canada |
City | Vancouver |
Period | 14/9/14 → 14/9/17 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics