Transcription of Introduction to Communication Systems
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Introduction to Communication Systems James Flynn Sharlene Katz Communications System Diagram July 1, 2010 Flynn/Katz - SDR 2 Information Source and Input Transducer Transmitter Channel Receiver Output Transducer Communications System Diagram July 1, 2010 Flynn/Katz - SDR 3 Information Source and Input Transducer Transmitter Channel Receiver Output Transducer Information Source: Audio, image, text, data Input Transducer: Converts source to electric signal Microphone Camera Keyboard Communications System Diagram July 1, 2010 Flynn/Katz - SDR 4 Information Source and Input Transducer Transmitter Channel Receiver Output Transducer Output Transducer: Converts electric signal to useable form Speaker Monitor Communications System Diagram July 1, 2010 Flynn/Katz - SDR 5 Information Source and Input Transducer Transmitter Channel Receiver Output Transducer Transmitter: Converts electrical signal into form suitable for channel Modulator Amplifier Communications System Diagram July 1, 2010 Flynn/Katz - SDR 6 Information Source and Input Transducer Transmitter Channel Receiver Output Transduc
In digital systems, performance is precisely specified as Probability of Error, P e. In digital systems, P e determined by modulation scheme and Signal to Noise Ratio, SNR. P e= number of errors in n bits n 17 Flynn/Katz - SDR July 1, 2010
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