Why was frequency hopping chosen over other approaches to spread spectrum?
FHSS and direct sequence spread spectrum (DSSS) are the primary spread spectrum techniques. Due to spectral constraints and inherent receiver complexity, direct sequence spread spectrum (DSSS) systems typically employ only minimal spreading; its ability to overcome fading and jamming is therefore relatively weak. On the other hand, FHSS is especially resistant to noise and multipath fading because it features greater coverage and channel utilization than comparable direct sequence-based systems. How does Cirronet’s approach differ from 802.11? When should each be used? The most suitable over-the-air protocol depends on the specific needs of the application. Cirronet’s products provide maximum coverage in a variety of applications, both short and long range, and in harsh indoor or outdoor environments. Both real world use and lab tests show that Cirronet’s FHSS-based products outperform other approaches, particularly in factory and industrial settings. For example, transmission range fo
