Spatial shaping in cognitive MIMO MAC with coded legacy transmission

Author

Jorswieck, Eduard A. ; Lv, Jing

Author_Institution

Commun. Theor., Commun. Lab., Dresden Univ. of Technol., Dresden, Germany

fYear

2011

fDate

26-29 June 2011

Firstpage

451

Lastpage

455

Abstract

This work considers the coexistence of a cognitive multiple-input multiple-output (MIMO)multiple access channel (MAC) system with a single-antenna legacy link which has a rate requirement. The legacy rate constraint is transformed into an interference constraint profile with individual interference temperature constraints (ITC) for the cognitive users. By spatial shaping (transmit covariance matrix optimization, linear precoding), an iterative algorithm is proposed to optimize the sum capacity of the cognitive MIMO MAC system, in which each user updates its transmit strategy with the transmit strategies of the other users fixed. The optimal single-user transmit strategy is obtained by comparing the achievable rate of two iterative algorithms, where transmit covariance matrix with either rank-one or rank-larger-than-one is optimized.

Keywords

MIMO communication; antenna arrays; cognitive radio; covariance matrices; interference; multi-access systems; ITC; coded legacy transmission; cognitive MIMO MAC; covariance matrix; interference temperature constraints; multiple-output multiple access channel system; spatial shaping; Cognitive radio; Covariance matrix; Interference; MIMO; Optimization; Receivers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications (SPAWC), 2011 IEEE 12th International Workshop on

Conference_Location

San Francisco, CA

ISSN

1948-3244

Print_ISBN

978-1-4244-9333-3

Electronic_ISBN

1948-3244

Type

conf

DOI

10.1109/SPAWC.2011.5990450

Filename

5990450