IP Core Applied to UWB - Application Note
Ultra Wide Band (UWB) applications include synthesis and reception of signals in the <10GHz band. FCC regulation has allocated a band above 3.1 GHz for wireless communication devices using very low power. Arrays of the Libove Sampler Pulser can be used to directly synthesize custom UWB transmissions in the 3.1GHz to 10GHz spectrum. This direct synthesis method has far simpler filtering requirements and is less susceptible to damage or tampering than planned baseband synthesis techniques. Additionally, the pulse shape can be tuned in place (amplitude, position, duration) by means of DC signals to attain the desired transmission characteristics and compensate for imperfect RF elements (antenna, medium, etc.) This unique capability will enable powerful low-cost designs that comply with the FCC allocated band.
UWB spectrum shown in FCC frequency allocation
The superior operating and matching characteristics of the Libove Sampler Pulser make it ideally suited for Ultra WideBand applications. The combination of the Libove Sampler Pulser’s stability, repetition rate, aperture modulation, noise rejection and scalability make it ideally suited for advanced UWB ASIC applications. A UWB transmitter incorporating the Libove Pulser has the capability to:
- Dynamically synthesize and receive complex signals in a 10 GHz band
- Control Tx spectral signature
- Adapt to changing spectrum conditions, eliminating the need for Tx filters because it is directly band-limited
- Pre-correct antenna Tx/Rx,
- Adapt to changing government regulations because it is field programmable
In short, a Libove Pulser array generates faster and more complex pulse structures at a lower cost than possible with conventional technology. The Libove Sampler Pulser allows the UWB system to dynamically control its spectral signature to adapt to changing spectrum conditions and to mitigate effects such as rain fade. Moreover, a UWB system incorporating the Libove Pulser has the added advantage of being directly band-limited at the point of synthesis and avoids out-of-bound interference with existing spectrum users. Because the Libove Sampler Pulser is programmable, it can even be adapted to changing FCC regulations – saving equipment from early obsolescence.