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FORMATTING AND BASEBAND MODULATION. BLOK DIAGRAM SISTEM KOMUNIKASI DIGITAL.

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Presentation on theme: "FORMATTING AND BASEBAND MODULATION. BLOK DIAGRAM SISTEM KOMUNIKASI DIGITAL."— Presentation transcript:

1 FORMATTING AND BASEBAND MODULATION

2 BLOK DIAGRAM SISTEM KOMUNIKASI DIGITAL

3 FORMATTING & TRANSMISSION BASEBAND SIGNAL

4 FORMAT SINYAL ANALOG Untuk mengubah bentuk gelombang analog menjadi bentuk yang kompatibel dengan komunikasi digital diperlukan tiga proses, yaitu: 1. Sampling 2. Quantization and Encoding 3. Baseband transmission

5 MESSAGES, CHARACTER & SYSMBOLS

6 SAMPLING Domain WaktuDomain Frekuensi

7 ALIASING EFFECT

8 TEOREMA PENCUPLIKAN A bandlimited signal with no spectral components above f m can be determined uniquely by values sampled at uniform intervals of The sampling rate, is called Nyquist Rate

9 KUANTISASI

10 ENCODING (PCM) A uniform linear quantizer is called Pulse Code Modulation (PCM) PCM: Encoding the quantized signals into a digital word (PCM word or codeword) each quantized sample is digitally encode into an l bits codeword where L in the number of quantization levels and l = log2L

11 CONTOH KUANTISASI

12 ERROR KUANTISASI

13 UNIFORM & NON-UNIFORM QUANTIZATION

14 NON-UNIFORM QUANTIZATION

15 STATISTICAL OF SPEECH

16 BASEBAND TRANSMISSION

17 PCM WAVEFORMS

18 PCM WAVEFORMS (2)

19 CRITERIA FOR COMPARING AND SELECTING PCM WAVEFORMS

20 CRITERIA FOR COMPARING AND SELECTING PCM WAVEFORMS (2)

21 SPECTRA OF PCM WAVEFORMS

22 M-ARY PULSE MODULATION

23 CONTOH PAM 8-ary PAM Binary PAM

24 CONTOH SOAL

25 SOLUSI

26 PCM WAVEFORM

27 ERROR KUANTISASI


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