Index
Browse all sections
Fifteen explainers, filed five ways. Nothing here expires, so read in any order.
01 · The Air Interface
What happens between antenna and antenna.- 01.1What Actually Travels Between a Handset and a MastOne transmission, end to end — power out, path loss, noise, and what arrives.7 min read
- 01.2Modulation, PlainlyHow information is written onto a carrier, and why the scheme matters.4 min read
- 01.3What an Antenna Is DoingGain, pattern and polarisation without the mathematics.4 min read
- 01.4Noise, Interference and the FloorWhy the limit is rarely power and usually noise.2 min read
02 · Standards & Generations
Who writes the rules and what changed when.- 02.1What Each Generation Actually ChangedFrom circuit-switched voice to packet everything — the real shifts.8 min read
- 02.2The Protocol Stack, Layer by LayerWhat each layer owns, and why the split exists at all.3 min read
- 02.3How a Standard Gets WrittenWorking groups, releases and why interoperability is the whole point.2 min read
03 · Critical Communications
Networks built to work on the worst day.- 03.1Why Critical Networks Are Built DifferentlyCoverage, priority and graceful failure beat peak throughput.5 min read
- 03.2Push-to-Talk and Group CallsOne-to-many voice, and the design consequences that follow.2 min read
- 03.3Designing for the Bad DayRedundancy, fallback and direct mode when the network is gone.4 min read
04 · Spectrum & Networks
Dividing the airwaves and covering ground.- 04.1How Spectrum Gets DividedAllocation, licensing and why the good bands are crowded.6 min read
- 04.2Why Physics Changes With FrequencyLow bands travel, high bands carry. The trade in one page.4 min read
- 04.3Cells, Reuse and HandoverWhy the network is a honeycomb and what happens when you move.4 min read