Title :
Design of Nyquist and near-Nyquist pulses with spectral constraints
Author :
Jayasimha, S. ; Singh, P.K.
Author_Institution :
Signion Syst. Ltd., Hyderabad, India
Abstract :
Two design procedures, one based on switched pulse shapes, and the other based on alternating projections in the time and frequency domain, are used to obtain interference and jitter-free or reduced interference and jitter (near-Nyquist) pulse-shaping filters. The latter method, that incorporates both frequency- and time- domain constraints into the linear filter design procedure, allows common pulse-shaping filters to be used for both QPSK and 8-PSK used in contemporary satellite modems
Keywords :
filtering theory; jitter; pulse shaping circuits; quadrature phase shift keying; radiofrequency interference; satellite communication; time-frequency analysis; 8-PSK; QPSK; alternating projections; interference-free; jitter-free; linear filter design procedure; near-Nyquist pulses; pulse-shaping filters; satellite modems; spectral constraints; switched pulse shapes; time-frequency domain; Band pass filters; Bandwidth; Chirp modulation; Digital filters; Frequency; Interference; Nonlinear filters; Optical signal processing; Pulse shaping methods; Shape;
Conference_Titel :
Personal Wireless Communications, 2000 IEEE International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
0-7803-5893-7
DOI :
10.1109/ICPWC.2000.905769
