Abstract
This letter proposes a new retransmission structure with multiple retransmission codebooks for a linear precoding-based closed-loop multiple-input multiple-output (CL-MIMO) system. While conventional codebooks are defined only for the initial transmission in CL-MIMO systems, we propose a multiple codebook structure in which a different codebook is used for each retransmission, instead of a single identical codebook for every retransmission. Simulation results indicate that in slowly fading channels the proposed scheme achieves a larger gain over the conventional scheme using a single codebook, especially as the number of antennas increases.
| Original language | English |
|---|---|
| Article number | 5962391 |
| Pages (from-to) | 953-955 |
| Number of pages | 3 |
| Journal | IEEE Communications Letters |
| Volume | 15 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2011 Sept |
Bibliographical note
Funding Information:Manuscript received April 11, 2011. The associate editor coordinating the review of this letter and approving it for publication was H. Wymeersch. This work is supported in part by the IT R&D program of MKE[KI001822]/KCC[08913-05001], Research on Ubiquitous Mobility Management Methods for Higher Service Availability. The authors are with the Department of Electrical Engineering, Korea University, Seoul, Korea (e-mail: [email protected]). Digital Object Identifier 10.1109/LCOMM.2011.072011.110780
Keywords
- MIMO
- Retransmission
- codebook
- precoding
ASJC Scopus subject areas
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering