What is the core transmission technology used by Cirronet products?
All Cirronet products employ a spread spectrum transmission methodology. This technique spreads a signal over multiple frequencies, distributing it over a larger set than would be used in conventional radio transmission. The effect is reduced system vulnerability to interference, jamming and multipath fading. Cirronet’s particular approach is based on a spread spectrum technique called frequency hopping spread spectrum (FHSS). Incorporating five patents, the company’s FHSS technology delivers a robust over-the-air protocol particularly well suited for challenging, sprawling or electrically noisy settings, such as manufacturing facilities. Its automatic repeat-request (ARQ) and 24-bit cyclic redundancy check (CRC) features transparently detect errors and request retransmissions as needed, ensuring associated network nodes see only error-free data. Why was frequency hopping chosen over other approaches to spread spectrum? FHSS and direct sequence spread spectrum (DSSS) are the primary sp
