Name
Abstract | ||
|---|---|---|
Opportunistic schedulers rely on the feedback of the channel state information of users in order to perform user selection and downlink scheduling. This feedback increases with the number of users, and can lead to inefficient use of network resources and scheduling delays. We tackle the problem of feedback design, and propose a novel class of nonorthogonal codes to feed back channel state information. Users with favorable channel conditions simultaneously transmit their channel state information via non-orthogonal beams to the base station. The proposed formulation allows the base station to identify the strong users via a simple correlation process. After deriving the minimum required code length and closed-form expressions for the feedback load and downlink capacity, we show that: the proposed algorithm reduces the feedback load while matching the achievable rate of full feedback algorithms operating over a noiseless feedback channel; and the proposed codes are superior to the Gaussian codes. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/WCNC.2014.6952399 | Wireless Communications and Networking Conference |
Keywords | Field | DocType |
codes,feedback,radiocommunication,channel state information,closed form expressions,correlation process,downlink capacity,downlink scheduling,feedback design,feedback load while matching,minimum required code length,nonorthogonal code,nonorthogonal uplink beams | Base station,Expression (mathematics),Scheduling (computing),Computer science,Communication channel,Real-time computing,Gaussian,Beam (structure),Channel state information,Telecommunications link | Conference |
ISSN | Citations | PageRank |
1525-3511 | 2 | 0.38 |
References | Authors | |
4 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mohammed Eltayeb | 1 | 25 | 1.61 |
| Al-Naffouri, T.Y. | 2 | 161 | 12.05 |
| Hamid-Reza Bahrami | 3 | 74 | 8.75 |