Abstract
In this chapter we will consider some of the fundamental concepts associated with analog modulation. Communication of analog signals from one location to another is accomplished by using either a wire channel or a radio channel. The source signals, such as voice, pictures, and in general baseband signals are not always suitable for direct transmission over a given channel. These signals are first converted by an input transducer into an electrical waveform referred to as the baseband signal or the message signal. The spectral contents of the baseband signals are located in the low-frequency region. The wire channels have a low-pass transfer function and can be used for transmitting signals that have a bandwidth less than the channel bandwidth. The radio channels have a band-pass characteristic. Low-pass signals can be transmitted through radio channels by using a modulator.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2010 Springer Science+Business Media, LLC
About this chapter
Cite this chapter
Yarlagadda, R.R. (2010). Analog Modulation. In: Analog and Digital Signals and Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-0034-0_10
Download citation
DOI: https://doi.org/10.1007/978-1-4419-0034-0_10
Published:
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-0033-3
Online ISBN: 978-1-4419-0034-0
eBook Packages: EngineeringEngineering (R0)