Title :
Improved signal constellations for differential unitary space-time modulations with more than two transmit antennas
Author :
Soh, Thian Ping ; Ng, Chun Sum ; Kam, Pooi Yuen
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
In this paper, we propose new and improved unitary signal constellations for differential unitary space-time modulations utilizing more than two transmit antennas. The proposed unitary designs are constructed from fundamental building blocks which comprise the generator matrices of diagonal cyclic codes, and the 2×2 and 3×3 rotational matrices. The performances of the proposed codes are superior to those of previously proposed codes.
Keywords :
antenna arrays; cyclic codes; fading channels; matrix algebra; modulation coding; space-time codes; transmitting antennas; diagonal cyclic codes; differential unitary space-time modulations; fading channel; generator-rotational matrices; multiple transmit antennas; signal constellations; Constellation diagram; Fading; Gaussian noise; Helium; Modulation coding; Rayleigh channels; Receiving antennas; Scattering; Signal to noise ratio; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.01023
