bitssHz

BitssHz is a term sometimes used to refer to spectral efficiency, defined as the amount of digital data that can be transmitted over a given bandwidth per unit of bandwidth. In most technical contexts this efficiency is expressed in bits per second per hertz (bps/Hz). BitssHz is not a formal SI unit; it is an informal or shorthand label found in some texts and industry materials to emphasize the per-hertz basis of the metric.

Mathematically, bitssHz can be described as η = R / B, where R is the achieved data rate in bits per second and B is the channel bandwidth in hertz. In the idealized case of a Gaussian channel, Shannon’s capacity theorem yields η ≤ log2(1 + SNR). Real systems are affected by modulation order, coding, channel conditions, interference, and antenna configurations, so practical values are typically lower than the theoretical maximum.

Measurement and interpretation of bitssHz require careful accounting for overhead such as signaling, control channels, and error correction. The definition of bandwidth (occupied versus total) and compliance with spectral masks can also influence reported values. Higher-order modulation, coding gains, and multi-antenna techniques can raise η, while mobility, fading, and interference can reduce it.

Examples: a data link delivering 100 Mbps over 20 MHz yields η = 5 bits/s/Hz. Systems with modest SNR may achieve a few bits per second per hertz, whereas advanced wireless technologies with rich MIMO and coding can push η higher within regulatory and practical limits.

Note: bitssHz is an informal term; standard references typically use bits per second per hertz (bps/Hz) or spectral efficiency to express the same concept.