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Chapter 8 Frequency Modulation (FM) Contents - UMD

Chapter 8 Frequency Modulation (FM)ContentsSlide 1 Frequency Modulation (FM)Slide 2FM Signal Definition (cont.)Slide 3 Discrete-Time FM ModulatorSlide 4 Single Tone FM ModulationSlide 5 Single Tone FM (cont.)Slide 6 Narrow Band FMSlide 7 Bandwidth of an FM SignalSlide 8 Demod. by a Frequency DiscriminatorSlide 9FM Discriminator (cont.)Slide 10 Discriminator Using Pre-EnvelopeSlide 11 Discriminator Using Pre-Envelope (cont.)Slide 12 Discriminator Using Complex EnvelopeSlide 13 Phase-Locked Loop DemodulatorSlide 14 PLL AnalysisSlide 15 PLL Analysis (cont. 1)Slide 16 PLL Analysis (cont. 2)Slide 17 Linearized Model for PLLS lide 18 Proof PLL is a Demod for FMSlide 19 Comments on PLL PerformanceSlide 20FM PLL vs.

This input is passed through a Hilbert transform filter to form the pre-envelope s+(nT) = s(nT)+jsˆ(nT) = Acej[ω cnT+θ m(nT)] (25) The pre-envelope is multiplied by the output of the voltage controlled oscillator (VCO) block. The input to the z−1 block is the phase of the VCO one sample into the future which is φ((n+1)T) = φ(nT)+ωcT ...

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  Modulation, Transform, Hilbert, Hilbert transform

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Transcription of Chapter 8 Frequency Modulation (FM) Contents - UMD

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