Double-Cap Differential Codebook Structure for MU MISO Systems in Correlated Channels

Autor:	Peter J. Smith, Apostolos Papathanassiou, Abdulla Firag, Pawel A. Dmochowski, Jawad Mirza, Mansoor Shafi
Rok vydání:	2014
Předmět:	Physics Quantization (signal processing) Codebook Code word Spherical cap Topology Precoding Transmission (telecommunications) Control and Systems Engineering Control theory Overhead (computing) Electrical and Electronic Engineering Differential (infinitesimal) Computer Science::Information Theory
Zdroj:	IEEE Wireless Communications Letters. 3:441-444
ISSN:	2162-2345 2162-2337
DOI:	10.1109/lwc.2014.2327639
Popis:	We propose a double-cap differential codebook (DCB) design for multiuser (MU) multiple-input-single-output systems. The MU transmission uses signal-to-leakage-and-noise ratio precoding. The double-cap DCB is designed for temporally/ spatially correlated channels and is based on a combined spherical and polar cap structure. We consider an inner spherical cap and an outer polar cap structure with different radii. The design allows us to systematically alter the radii of the caps over the feedback time depending on the previously selected codeword. The proposed double-cap DCB does not require knowledge of temporal or spatial channel correlation at the base-station, thus removing the overhead of additional feedback from the user. Simulation results show the effectiveness of the proposed double-cap DCB over a single polar cap DCB in terms of sum capacity gain and quantization errors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f46112fb75556186f993ed9a38dd2721 https://doi.org/10.1109/lwc.2014.2327639 Zobrazit plný text záznamu