By Topic

The Square-Law Single-Sideband System

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
$33 $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

2 Author(s)
C. Von Urff ; RCA Laboratories, Princeton, NJ, USA ; F. Zonis

A new method of generation of a single-sideband signal has been developed which provides distortionless reception with a square-law envelope detector. This performance is achieved through a new system design rather than a less subtle method, such as carrier reinsertion. It is well known that a single-sideband signal can be represented as a combination of amplitude and phase-modulated signals. Most methods of single-sideband generation do not allow separate control of the amplitude and phase modulation. However, in the system described in this paper the amplitude and phase-modulation components are generated separately and have a specific functional relationship with each other. The amplitude-modulation envelope is the square root of the waveform to be transmitted and the phase modulation is the Hilbert transform of the logarithm of the envelope. A signal generated in this manner will occupy a bandwidth equal to the bandwidth of the original modulating signal and may be received without distortion with a square-law envelope detector. Tests on the system have shown that it is possible to obtain [1] an average of 25-db sideband rejection using band-limited white noise as the modulating signal, and [2] an average of 2 per cent harmonic distortion and 9 per cent intermodulation distortion using a square-law detector.

Published in:

IRE Transactions on Communications Systems  (Volume:10 ,  Issue: 3 )