-
And since a moving object causes a tiny change (known as a Doppler shift) in the frequency of the reflected signal, Silent Sentry can also calculate how fast it is moving.
ECONOMIST: Remote sensing
-
In an announcement of sorts yesterday, DARPA reportedly said that the project's goal is to use "set of handheld devices" to track down a specific "signal emitter of interest" using radio frequency geolocation, and presumably some other measures they're not about to dish the details on.
ENGADGET: DARPA's "Gandalf" project aims to hone in on cellphones and track 'em
-
Then through the use of GPS-based reference clocks at each tower (for both time and frequency), the signals are synced so each can emit a perfect copy of both signal and symbol data.
ENGADGET: blogger-avatar
-
With HackRF in the hands of hackers or security researchers, in other words, no wireless signal would remain secure just by virtue of using a unique, unfamiliar frequency.
FORBES: DARPA-Funded Radio HackRF Aims To Be A $300 Wireless Swiss Army Knife For Hackers
-
The best part is, applying different levels of OAM twist to SAM-based transmissions theoretically allows an infinite number of streams per signal, meaning seriously increased bandwidth without the need for additional frequency.
ENGADGET: New wireless transmission tech hits 2.56Tbps, leaves WiFi feeling inadequate
-
Furthermore, the LightSpeaker's 2.5-inch wide dispersion driver uses digital signal processing to optimize high- and low-frequency output for a full spectrum of sound.
ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)
-
The superconductor's lack of resistance allows the firm to build filters that can chop a signal into much narrower frequency bands than a traditional filter.
ECONOMIST: Superconductors are starting to become useful
-
It's like 'inverting' the signal on odd lines, or shifting it in time by 180 degrees of the color waveform frequency.
FORBES: Steve Wozniak: His Career Challenges, Steve Jobs, Tech Trends and Advice
-
Battery power consumption depends on factors such as network configuration, signal strength, operating temperature, features selected, vibrate mode, backlight settings, browser use, frequency of calls and voice, data and other application usage patterns.
ENGADGET: Samsung Galaxy Note II for T-Mobile made (more) official, comes with gamepad-tuned racing this fall