Title :
A general approach to differential transmit diversity
Author :
Hughes, Brian L.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
We consider the design of transmit diversity techniques that do not require channel estimates at the transmitter or receiver. We propose a general approach to differential modulation for multiple transmit antennas based on groups of unitary matrices. This approach can be applied to any number of transit antennas and any signal constellation. We further design optimal differential transmit diversity schemes for the particular case of two transmit antennas.
Keywords :
diversity reception; group codes; matrix algebra; modulation; multipath channels; optimisation; transmitting antennas; QPSK; differential modulation; multipath fading channels; multiple transmit antennas; optimal differential transmit diversity; signal constellation; unitary group codes; unitary matrices; Block codes; Channel estimation; Costs; Differential quadrature phase shift keying; Fading; Frequency shift keying; Receiving antennas; Space time codes; Transmitters; Transmitting antennas;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.832405
