Advantages of Digital Modulation
V. 1.0 - 22.09.2003
Copyright (C) 09/2003 by Howard Fuhs
The fact that digital modulation has its advantages from the industry and users point of view, it is not necessarily safer against eavesdroppers. It is a fact that most satellite hackers are nowadays also into listening to digital modulation types.
(1) Digital system tend to be less susceptible to waveform distortion, such as crosstalk, nonlinearities, and noise compared to analog systems.
(2) The signal to noise performance of the system (energy per bit/spectral noise density) increases linearly in dB with the number of bits used per sample, giving a more efficient noise/bandwidth trade-off than FM.
(3) Digital transmission gives complete freedom to multiplex digital data, voice and video, giving the digital system more flexibility than the analog system.
(4) Digital transmission provides the cheapest possible interface to digital switching systems.
(5) Large scale intergration technology tends to favor digital processing techniques over analog.
(6) Digital signals are much easier to encipher and decipher when security is important.
I invite your suggestions for revising this document. I plan to review and revise this document as the need arises.
Copyright (C) 09/2003 by Howard Fuhs
All Rights Reserved!