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What is bit rate and frequency?
A bit is either a 1 or 0, a “yes” or “no,” or an “on” or “off.” The frequency of a signal voltage is measured in cycles per second. One hertz is one complete cycle per second. While higher frequency can mean a faster system, a truer measurement of communication speed is bit rate.
How do you calculate frequency from bit rate?
The bit rate is calculated using the formula:
- Frequency × bit depth × channels = bit rate.
- 44,100 samples per second × 16 bits per sample × 2 channels = 1,411,200 bits per second (or 1,411.2 kbps)
- 1,411,200 × 240 = 338,688,000 bits (or 40.37 megabytes)
What’s the difference between bit rate and frequency?
While higher frequency can mean a faster system, a truer measurement of communication speed is bit rate. Most data communications systems operate at millions of cycles per second, or megahertz. In high frequencies, such as values in the MHz range, the time the cycle requires is measured in minute fractions of a second.
How can we increase the bit rate of a signal?
To increase the bit rate or “speed” of the signal in the example above, we would have to increase the frequency. The system still sends out 2 bits per cycle, but does it in shorter cycles. Although this may seem to be a suitable solution in the search for higher communication speeds, there is a problem.
How is the bandwidth related to data rate?
The bandwidth then tells you how fast you can send symbols. This is quantified by the Nyquist-Shannon sampling theorem, that one can theoretically send symbols at a rate of B / 2 symbols per second through a channel of bandwidth B.
How is the frequency of a signal measured?
A bit is either a 1 or 0, a “yes” or “no,” or an “on” or “off.” The frequency of a signal voltage is measured in cycles per second. One hertz is one complete cycle per second. While higher frequency can mean a faster system, a truer measurement of communication speed is bit rate.