Receiver Antenna

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    Slide 2

    B

    ElectromagneticEnvironment

    RadioOptical, InfraredAcoustic, other

    HumanC

    Processor Transducer

    Subject Content

    Communications: A C (radio, optical)

    Active Sensing: A

    C (radar, lidar, sonar)Passive Sensing: B C (systems and devices:

    environmental, medical, industrial,consumer, and radio astronomy)

    A2

    HumanA

    Processor Transducer

    6.661 Fall 2001

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    Slide 3

    Subject Offers

    Physical concepts

    Mathematical methods, system analysis

    and design

    Applications examples

    Motivation and integration of prior learning

    A36.661 Fall 2001

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    Slide 4

    Subject Outline

    Review of signals and probability

    Noise in detectors and systems; physics of detectors

    Receivers and spectrometers; radio, optical, infrared

    Radiation, propagation, and antennas

    Signal modulation, coding, processing and detection

    Communications, radar, radio astronomy, and remote

    sensing

    Parameter estimation

    A46.661 Fall 2001

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    Slide 5

    Review of Signals

    Signal Types to be Reviewed:

    A5

    Pulses (finite energy)

    Periodic signals

    (finite energy per period)

    Random signals

    (finite power, infinite energy)

    6.661 Fall 2001

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    Slide 6

    Pulses v(t)

    B1

    )f(V

    rfor"

    ;f

    dt)t(v 2

    Define Fourier Transform:

    N

    [

    ]volts/Hzdte)t(v)f(Vj

    ==

    [

    ]voltsdfe)f(V)t(v j

    +

    =

    6.661 Fall 2001

    v(t)e.g.

    :TransformFourie"notationDefine

    etc.newtons,,metersvolts,ess,dimensionlbecanv(t)e.g.

    consistentselbeonlymustDimensions