Abstract
Accurate channel direction information is essential to achieve considerable capacity gains in multiple-input multiple-output (MIMO) wireless communication systems. Limited feedback using a polar-cap differential codebook which utilizes the temporal correlation in multiple-input single-output (MISO) channels is presented in this paper. We first describe the general properties of the polar-cap differential codebook and then explain the design methodology of the size of the polar-cap given the temporal correlation coefficient. We also propose an enhancement of the polar-cap differential codebook which is suitable for a spatially correlated channel. We compare the polar-cap differential codebook with a rotation-based differential codebook in terms of the chordal distance to demonstrate the superiority of the polar-cap differential codebook. Monte Carlo simulation results show that the polar-cap differential codebook facilitates a significant performance gain in both temporally and spatially correlated channels.
| Original language | English |
|---|---|
| Article number | 6117043 |
| Pages (from-to) | 703-711 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2012 Feb |
Keywords
- Temporally/spatially correlated multiple-input single-output (MISO) channel
- differential codebook
- limited feedback
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics