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sysc-3501-signal-analysis

sysc-3501-signal-analysis - Introduction and Signal...

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1 Introduction and Signal Analysis SYSC-3501 Communication Theory
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2 Introduction The function of a communication system is to produce at the receiver the same signal at the transmitter The communication channel may be a transmission line, optical fiber, coaxial cable, or free space (wireless) The communication channel corrupts the transmitted signal by filtering effects, interference and noise. The function of the transmitter is to adapt the signal to the channel conditions by performing modulation and coding. The function of the receiver is to recover the transmitted signal in the presence of channel distortion by performing demodulation and decoding. Two factors contributing to system performance: transmitted power and channel bandwidth communication systems are usually classified as power-limited or band-limited. Transmitter Channel Receiver   t s   t s   t s ˆ
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