Title :
Effect of Channel Estimation Errors on Arbitrary Transmit Antenna Selection for Cognitive MISO Systems
Author_Institution :
Fac. of Inf. Technol., Macau Univ. of Sci. & Technol., Macau, China
fDate :
6/1/2011 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2011.050311.110553
