• 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: impairments and linear systems
    Chapter 4
    frequency translation: amplitude modulation and IF
    Chapter 5
    sampling and automatic gain control
    Chapter 6
    receive filtering: digital filtering
    Chapter 7
    symbols to bits to signals
    Chapter 8

    Chapter 9 provides a complete (though idealized) software-defined digital radio system.