Name
Title | ||
|---|---|---|
Opportunistic Feedback Protocol For Achieving Sum Capacity Of The Mimo Broadcast Channel |
Abstract | ||
|---|---|---|
This paper presents an opportunistic feedback (OF) protocol that achieves the asymptotic sum capacity of the fading broadcast channel (BC) with a limited amount of feedback. The OF protocol associates a channel value instead of a user to each feedback slot. The users access the slots opportunistically based on their channel state measurement. This allows the base station to deduce the channel state from the slot index without explicit channel state feedback. This protocol is then extended to the MIMO BC by using zero forcing beamforming and random beamforming. The OF protocol is analytically shown to (a) require finite number of feedback slots upper bounded by a small number, (b) be fully distributed, (c) need minimal transmission energy during feedback and (d) asymptotically achieve the sum capacity of the MIMO BC. Comparison with other opportunistic feedback schemes shows that the proposed scheme has substantially larger sum rate with a lower feedback overhead. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/VETECF.2007.137 | 2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 |
Keywords | Field | DocType |
i. introduction,zero forcing,upper bound,indexation,protocols,base station | Beamforming,Finite set,Fading,Computer science,Computer network,MIMO,Communication channel,Mimo broadcast channel,Electronic engineering,Precoding,Bounded function | Conference |
ISSN | Citations | PageRank |
1550-2252 | 13 | 0.83 |
References | Authors | |
10 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Rajiv Agarwal | 1 | 47 | 6.34 |
| Chan-Soo Hwang | 2 | 341 | 36.48 |
| John M. Cioffi | 3 | 4076 | 772.00 |