Each signal is allocated different time and micro-frequency relationships that can only be unscrambled by an a priori knowledge embedded in selected receivers. Suddenly, I am now in possession of more transmitters than receivers.
Dogpile, a "meta search engine" that queries a range of other engines, had a "visitor-to-searcher" conversion rate - or the percentage of people who visit a site and then end up searching there - of 83 per cent.
Only the allocation of unused frequency space, power limiting specifications to keep radio operation safe and interference free, and smart software. That was realised by night vision devices and image intensifiers.
Another important improvement is the addition of adaptive frequency hopping (AFH), which is designed to reduce interference with other devices that use the same 2.4GHz wireless spectrum -- including some cordless phones and increasingly-popular Wi...
Marks & Spencer (M&S) is set to run more extensive trials of radio frequency identification (RFID) tags following the success of an initial pilot in items of clothing at its High Wycombe store near London.
The general direction they will be taking is to create a convergence layer that will allow device manufacturers to abstract the radio frequency (RF) part from the rest of the device. This is vital because the RF portion of Bluetooth is quite...