Net DoF analysis for the K-user MISO IC with outdated and imperfect channel feedback

Author

Torrellas, Marc ; Agustin, Adrian ; Vidal, Josep

Author_Institution

Univ. Politec. de Catalunya (UPC), Barcelona, Spain

fYear

2015

Firstpage

52

Lastpage

56

Abstract

The net degrees of freedom (DoF) describe the efficiency of a protocol in terms of network throughput at high signal-to-noise ratio (SNR). As the conventional DoF, it captures how the achievable user data rate grows as SNR increases, but also takes into account the limited channel state information at the transmitters (CSIT), and required protocol overheads. This work studies the impact of short channel coherence time for the K-user Multiple-Input Single-Output (MISO) Interference Channel (IC) by means of the net DoF. We propose different protocols, combining techniques that exploit different levels of CSIT (delayed, current or no CSIT), and elucidating which performs better as a function of user mobility.

Keywords

MIMO communication; diversity reception; mobility management (mobile radio); protocols; radio networks; radio transmitters; radiofrequency interference; wireless channels; CSIT; K-user MISO IC; channel state information at transmitter; combining technique; high SNR; high signal-to-noise ratio; imperfect channel feedback; multiple input single output interference channel; net DoF analysis; net degrees of freedom analysis; network throughput; outdated channel feedback; protocol overhead; user mobility; Antenna feeds; III-V semiconductor materials; Indium phosphide;

fLanguage

English

Publisher

ieee

Conference_Titel

Networks and Communications (EuCNC), 2015 European Conference on

Conference_Location

Paris

Type

conf

DOI

10.1109/EuCNC.2015.7194039

Filename

7194039