Title :
Bandwidth efficient coded diversity for slow fading channels
Author :
Gagnon, François ; Haccoun, David
Author_Institution :
Dept. of Electr. Eng., Ecole de Technol. Superieure, Montreal, Que., Canada
Abstract :
A coded frequency diversity scheme is presented for improving the error performance of coding and modulation on slow fading channels. Without additional bandwidth expansion, the signal is spread over different independent fading channels. Both trellis coded modulation (TCM) and usual convolutional codes may be used with this technique. For two very slow fading channels, where interleaving is impractical and coding usually does not provide any gain, coded diversity and 16 quadrature amplitude modulation (QAM) TCM provide gains of 13 dB at a BER of 10-4
Keywords :
Rayleigh channels; coding errors; convolutional codes; covariance matrices; diversity reception; fading; quadrature amplitude modulation; spread spectrum communication; trellis coded modulation; 13 dB; 16 quadrature amplitude modulation; QAM; TCM; coded frequency diversity scheme; convolutional codes; error performance; slow fading channels; trellis coded modulation; Bandwidth; Bit error rate; Convolutional codes; Error correction; Fading; Frequency diversity; Gain; Interleaved codes; Modulation coding; Spread spectrum communication;
Conference_Titel :
Vehicular Technology Conference, 1993., 43rd IEEE
Conference_Location :
Secaucus, NJ
Print_ISBN :
0-7803-1267-8
DOI :
10.1109/VETEC.1993.507024
