Title :
New QPSK space-time trellis codes
Author :
Chan, François ; Bernier, David
Author_Institution :
Dept. of Elec. & Comp. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada
fDate :
6/24/1905 12:00:00 AM
Abstract :
It has been shown that the design criteria for space-time trellis codes over quasi-static Rayleigh fading channels are the rank criterion and the determinant criterion. Recently, a new design criterion that maximizes only the trace of the distance matrices has been proposed for systems with a large product of the numbers of transmit and receive antennas. These codes are superior when the number of receive antennas is 4 or more. In this paper, the two design criteria are combined so that the codes are good or robust whatever the number of receive antennas is. New QPSK codes that optimize the trace/determinant pair and achieve the full rank are presented. These codes outperform other previously known codes whether there are two receive antennas or more.
Keywords :
Rayleigh channels; channel coding; determinants; matrix algebra; optimisation; quadrature phase shift keying; receiving antennas; transmitting antennas; trellis codes; QPSK codes; determinant criterion; distance matrices; optimization; quasi-static Rayleigh fading channels; rank criterion; receive antennas; space-time trellis codes; trace maximization; trace/determinant pair; transmit antennas; Convolutional codes; Diversity methods; Diversity reception; Educational institutions; Euclidean distance; Fading; Quadrature phase shift keying; Receiving antennas; Robustness; Space time codes;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002831
