Title :
VPSK and VMSK modulation transmit digital audio and video at 15 bits/sec/Hz
Author_Institution :
Pegasus Data Syst., Middlesex, NJ, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
Bandwidth efficiencies that have not been possible in the past are now being achieved using variable PSK (VPSK) and variable MSK (VMSK) modulation without the loss of signal power that normally accompanies high bandwidth efficiency methods. Theoretically, these two methods do not lose any signal energy with increasing bandwidth compression. Efficiencies up to 15 bits/sec/Hz are now being achieved in usable hardware with C/N ratios better than that obtainable using FM, BPSK or QPSK. This paper explains how this is accomplished and gives a full mathematical analysis of the method. FM-SCA, VSAT, STL and RPU equipment are now undergoing beta testing prior to FCC Type Acceptance submission. Installation is expected on a large network during 1997
Keywords :
bandwidth compression; digital audio broadcasting; minimum shift keying; phase shift keying; visual communication; C/N ratios; FM-SCA equipment; RPU equipment; STL equipment; VMSK; VPSK; VSAT equipment; bandwidth compression; beta testing; carrier/noise ratio; digital audio; digital video; high bandwidth efficiency methods; signal energy; variable MSK; variable PSK; Apertures; Bandwidth; Binary phase shift keying; Digital modulation; FCC; Hardware; Large Hadron Collider; Magnetic force microscopy; Mathematical analysis; Modulation coding; Optical signal processing; Phase shift keying; Quadrature amplitude modulation; Quadrature phase shift keying; Testing;
Journal_Title :
Broadcasting, IEEE Transactions on
