Eb/N0
Pronunciation: E-b over N-zero
Energy per bit to noise power spectral density ratio; a normalised signal quality metric used in digital satellite communications to define the minimum threshold for acceptable bit error rate performance.
Full Definition
Eb/N0 (pronounced 'E-b over N-zero') is the fundamental measure of digital link quality, independent of bit rate or bandwidth. It represents the energy carried by each information bit relative to the background noise power density. In link budget calculations, the required Eb/N0 is determined by the modulation and coding scheme (MODCOD) in use, and the link must deliver sufficient C/N or C/N0 to meet this threshold. Editors must render the term precisely: 'Eb/N0' with subscript notation where typographically supported, or 'Eb/N0' in plain text. It must not be confused with C/N (carrier-to-noise ratio), which is a related but distinct quantity.
Usage
Usage note: In plain text, render as 'Eb/N0'. In documents with rich text support, use subscript for 'b' and '0'. Do not substitute 'SNR' or 'C/N' without confirming the author's intent, as these are technically distinct quantities.
In Context
- "The DVB-S2 modem required a minimum Eb/N0 of 6.2 dB to maintain quasi-error-free operation at the selected MODCOD." — Link Budget Analysis
- "Editors should flag any table that lists Eb/N0 and C/N values without clarifying the reference bandwidth or modulation scheme." — Technical Review Checklist