channel capacity

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channel capacity

A computer screen displays a graph of channel capacity over time.

Definition

Noun: - The maximum data rate that can be attained over a given communication channel: This is a technical term from information theory and telecommunications. It refers to the highest possible speed, measured in bits per second (bps), at which information can be reliably transmitted through a specific channel without error, given its bandwidth and signal-to-noise ratio.

Usage
  • This term is used in technical contexts involving data communication, networking, and information theory.
  • It is often discussed in relation to the limitations or performance of communication systems, such as internet connections, wireless networks, or telephone lines.
Examples
  • Noun:
    • The engineer calculated the channel capacity to determine if the fiber-optic line could support the new video streaming service.
    • Shannon's theorem provides a formula for calculating the theoretical channel capacity of a communication link.
Advanced Usage
  • "To approach/reach channel capacity": Describes a system operating at or near its maximum theoretical data rate.
    • Modern error-correcting codes allow data transmission systems to closely approach channel capacity.
Variants and Related Words
  • Bandwidth (n): The range of frequencies a channel can carry, which is a key factor in determining capacity. (Note: Bandwidth is related but not synonymous; it is a component of the capacity calculation).
  • Data rate (n): The actual speed of data transfer, which may be below the channel capacity.
  • Throughput (n): The actual rate of successful message delivery, which is often less than the channel capacity due to real-world overhead and errors.
Synonyms
  • Maximum data rate
  • Shannon capacity (specifically referring to the theoretical limit defined by Claude Shannon)
Related Phrases
  • Channel coding theorem: A fundamental principle that states that reliable communication is possible at any rate below the channel capacity.
  • Noisy-channel coding theorem: Another name for the principle that defines the concept of channel capacity.
channel capacity

A computer screen displays a graph of channel capacity over time.

Noun
  1. the maximum data rate that can be attained over a given channel