By Topic

Note on Coherent Quadrature Modulation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Amoroso, Frank ; South Laguna, Calif.

Coherent quadrature modulation has long been identified with the bandwidth-efficient transmission of low-pass signals over bandpass media. A significant recent contribution to the theory of parallel transmission has been that of O'Neill and Saltzberg; they showed that if there was proper synchronization between the modulating carrier and the data clock, then the two parallel channels in coherent quadrature transmission could be equalized by a single transversal filter directly in tandem with the transmission facility, and the same automatic equalization algorithms would be applicable as have previously been associated with strictly serial transmission employing vestigial sideband modulation. It is seen here that the analytic technique of O'Neill and Saltzberg can be used to show that the convenient transversal filter equalization is also possible in the more general coherent quadrature systems in which the synchronization condition imposed by those authors may not hold. Thus it is implied that parallel transmission with coherent quadrature modulation can be adopted in many applications heretofore reserved for serial transmission.

Published in:

Communication Technology, IEEE Transactions on  (Volume:17 ,  Issue: 5 )