The idealized system layer: The third layer encompasses Chapters 4 through 9. This layer gives a closer look at the idealized receiver - how things work when everything is just right: when the timing is known, when the clocks run at exactly the right speed, when there are no reflections, diffractions, or diffusions of the electromagnetic waves. This layer also integrates ideas from previous systems courses, and introduces a few Matlab tools that are needed to
implement the digital radio.
The order in which topics are discussed is precisely
the order in which they appear in the receiver:
channel
Chapter 4
->
frequency
translation
Chapter 5
->
sampling
Chapter 6
->
frequency
translation
->
receive
filtering
-> equalization
Chapter 7
->
decision
device
-> decoding
Chapter 8
->
reconstructed
message
channel:impairmentsandlinearsystems
Chapter 4
frequencytranslation:amplitudemodulationandIF
Chapter 5
samplingandautomaticgaincontrol
Chapter 6
receivefiltering:digitalfiltering
Chapter 7
symbolstobitstosignals
Chapter 8
Chapter 9 provides a complete (though idealized) software-defined digital radio system.