Title :
Signal shaping in digital QAM systems
Author :
Maqusi, Mohammad ; Abu-Shammeh, Mahmoud I.
Author_Institution :
Dept. of Electr. Eng., Jordan Univ., Amman, Jordan
Abstract :
In this paper we investigate certain aspects of signal shaping in digital QAM systems. In particular, the spectral behaviour of such systems is investigated with reference to rectangular, sine-pulse, and T-pulse shapes. Partial response signalling is also applied to QAM systems. Consequently, spectral efficiency (bps/Hz) performance is considered, and the fractional out-of-band energy contents are computed. In addition error probability for transmission of such signals over typical linear and nonlinear Volterra channels is investigated
Keywords :
digital communication; digital signals; error statistics; partial response channels; quadrature amplitude modulation; spectral analysis; T-pulse shape; digital QAM systems; error probability; fractional out-of-band energy contents; linear Volterra channels; nonlinear Volterra channels; partial response signalling; rectangular pulse shape; signal shaping; sine-pulse shape; spectral behaviour; spectral efficiency performance; AWGN; Amplitude modulation; Bandwidth; Baseband; Constellation diagram; Error probability; Ground penetrating radar; Pulse shaping methods; Quadrature amplitude modulation; Shape;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.518984
