Title :
A novel bandwidth-efficient trellis-encoder with a pulse shaping filter bank
Author :
Ramseier, Stefan
Author_Institution :
Ascom Tech. Ltd., Baden, Switzerland
Abstract :
A novel trellis encoder that shapes the spectrum of the transmitted signal to minimize its out-of-band power is proposed. The new encoder uses a pulse shaping filter bank. The filter bank is optimized to reduce the bandwidth of the transmitted signal. Compared to M-ary quadrature amplitude modulation (QAM), the resulting new modulation schemes allow an increase in the bandwidth efficiency by up to 0.5 b/s/Hz or a decrease in the signal power by about 1 dB
Keywords :
digital filters; encoding; filtering and prediction theory; trellis codes; bandwidth efficiency; out-of-band power; pulse shaping filter bank; signal power; spectrum shaping; transmitted signal; trellis encoder; Bandwidth; Costs; Filter bank; Modulation coding; Power system modeling; Pulse shaping methods; Quadrature amplitude modulation; Satellite broadcasting; Shape; Shift registers;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268075
