data&signals4 - low = 0 Since a digital signal is a...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Digital Signals Bit Rate: “non-periodic” digital signals are the most used in digital data transfer, hence period or frequency are not used, instead we use “Bit rate” which is the number of bits T x per sec. Bit length = propagation speed * bit duration (distance one bit occupies on the T x medium) Bit interval: Time to T x a bit = 1/bit rate = s/b Baud rate : Number of distinct changes (in signal) over the medium per sec Bit rate = Baud rate X number of bits per a signal change In binary signals encoding, bit rate = baud rate (why?) Transmission of Digital Signals: 1) Baseband: We use low-pass channel with its BW starting from 0 (i.e., f
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: low = 0). Since a digital signal is a composite analog signal with infinite BW, the idle case is to have low-pass channel with infinite bandwidth (not in real life!). Yet, we can still send only the signal’s frequency components with significant amplitudes within some acceptable threshold for minimum distortion and receive a reasonably acceptable digital signal at the receiver. As the bit rate increases, the signal significant BW (BW ss ) increases, hence we need a wider medium low-pass wider BW (BW m ) For safe digital signal reception: BW m >= BW ss...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern