Effect of Channel Estimation Errors on Arbitrary Transmit Antenna Selection for Cognitive MISO Systems

Author

Li, Dong

Author_Institution

Fac. of Inf. Technol., Macau Univ. of Sci. & Technol., Macau, China

Volume

15

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

656

Lastpage

658

Abstract

This letter analyzes the effect of channel estimation errors on the performance of cognitive multiple input and single output (MISO) systems with arbitrary transmit antenna selection. In particular, the channel estimation errors are caused by the partial channel information between the cognitive transmitter and the primary receiver. Utilizing the derived probability density function (PDF) of the received signal-to-noise ratio (SNR), the effective capacity of the considered systems is numerically evaluated, and a new closed-form expression for the case of perfect channel estimation is also derived. Simulation results show that the system performance is not sensitive to the channel estimation error, especially for strict delay quality of service (QoS) requirement of the cognitive user (CU).

Keywords

channel estimation; cognitive radio; error statistics; probability; quality of service; transmitting antennas; wireless channels; arbitrary transmit antenna selection; channel estimation error; closed-form expression; cognitive MISO system; cognitive multiple input single output system; cognitive transmitter; cognitive user; partial channel information; primary receiver; probability density function; quality of service; received signal-to-noise ratio; Channel estimation; Cognitive radio; Delay; Quality of service; Receiving antennas; Transmitting antennas; Effective capacity; arbitrary antenna selection; channel estimation errors; cognitive MISO system;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.050311.110553

Filename

5764933