1 / 23

Baseband Pulse and Digital Signaling

Baseband Pulse and Digital Signaling. Definitions. If bits are encoded into one symbol Baud Rate D = N/T o (# Symbols per unit of time) Bit Rate R = lD (# Bits per unit of time, assuming l bits per symbol) Also Baud Rate D = 1/T symbol (The frequency at which symbols are sent)

gradyw
Télécharger la présentation

Baseband Pulse and Digital Signaling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Baseband Pulse and Digital Signaling

  2. Definitions • If bits are encoded into one symbol • Baud Rate D = N/To(# Symbols per unit of time) • Bit Rate R = lD(# Bits per unit of time, assuming l bits per symbol) • Also • Baud Rate D = 1/Tsymbol(The frequency at which symbols are sent) • Bit Rate R = l/Tsymbol(The frequency at which bits are sent)

  3. Desirable properties of a line code • Self-Synchronization • Low Probability of bit error • Spectrum suitable for channel • Transmission bandwidth • Error detection capability • Transparency

  4. The advantage over analog communication is that the signal is cleaned before retransmission. The filter reduces noise and equalizes for ISI In general, unipolar, polar and bipolar will work when there are sufficient number of alternating 1’s and 0’s. Other techniques required when these conditions are not met (Scrambling, Manchester).

  5. Works for unipolar RZ if square law device is eliminated Works for unipolar RZ if square law device is eliminated

  6. http://www.cardinalxtal.com/static/frontend/files/cardinal-phase-lock-loop-basics.pdfhttp://www.cardinalxtal.com/static/frontend/files/cardinal-phase-lock-loop-basics.pdf

  7. In general, unipolar, polar and bipolar will work when there are sufficient number of alternating 1’s and 0’s. Other techniques required when these conditions are not met (Scrambling, Manchester).

More Related