Title :
On Angle Feedback and Antenna Shuffling in Double Space-Time Transmit Diversity Systems
Author :
Xu, Tao ; Liu, Huaping
Author_Institution :
Sch. of Electr. Eng., Comput. Sci., Oregon State Univ., Corvallis, OR, USA
fDate :
8/1/2010 12:00:00 AM
Abstract :
In this letter, we compare angle feedback and transmit antenna shuffling schemes for double space-time transmit diversity (DSTTD) systems with four transmit antennas and at least two receive antennas. We show that a DSTTD system with one bit of angle feedback does not provide better performance than the same system with one bit of transmit antenna shuffling. We also present a simplified general result about the selection of antenna shuffling matrix from six permutation matrices to facilitate our arguments. In simulation, we observe that antenna shuffling outperforms angle feedback in i.i.d. Rayleigh fading channels.
Keywords :
Rayleigh channels; diversity reception; interference suppression; receiving antennas; transmitting antennas; DSTTD system; Rayleigh fading channels; angle feedback; double space time transmit diversity systems; permutation matrices; receive antennas; transmit antenna shuffling; Antenna feeds; Bit error rate; Computer science; Equalizers; Fading; Feedback; Interference suppression; Receiving antennas; Signal to noise ratio; System performance; Transmitting antennas; Double space-time transmit diversity; angle rotation; antenna shuffling; limited rate feedback;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.08.100384
