Quellan's QNx220 Noise Canceller boosts mobile signal strength
September 3, 2007 Quellan has announced a new RF Noise Canceller that extends the advantages of the technology beyond the realm of purely audio applications to enhance signal strength and clarity for video reception. In a weak signal area such as underground roadways or in high rise environments, a cell phone using the QNx220 can recover several bars of lost signal strength and a GPS receiver can obtain a location lock in just seconds rather than minutes.
Designed for mobile and stationary platforms where electromagnetic noise impairs reception, the Quellan QNx220 actively cancels interference by inverting and electronically subtracting emulated local noise signals from the receiver input signal. Gain and phase of the cancellation signal are continuously adjusted for optimum performance. This is especially effective with closely spaced antenna radiation, internal processor noise, and camera and display noise.
The Quellan QNx220 is extremely small for ease of integration - measuring under 1mm thick - and is available in a Chip Scale Package for RF modules or in a QFN package for direct on-board use.
"Noise cancellation has traditionally been limited to the audio spectrum," said Tony Stelliga, Quellan's Chairman and CEO. "By removing noise at the RF antenna level in the Electromagnetic spectrum, a massive improvement in user experience beyond audio - including video, signal clarity and location accuracy - can be achieved. These improvements are impossible to achieve with conventional circuitry or signal processing techniques."
The technology will also benefit signal strength in the emerging area of mobile TV according to Quellan.