Mark B Clements

US Patent:

20040086001, May 6, 2004

Filed:

Oct 30, 2002

Appl. No.:

10/283732

Inventors:

George Miao - Marlboro NJ, US
Mark Clements - Lilburn GA, US

International Classification:

H04B001/10
H04J003/06

US Classification:

370/516000, 370/520000

Abstract:

Using the 1st derivative ultra-narrow Gaussian monocycle pulse passed through a digital shaping multi-band FIR filter may generate a digital ultra-narrow shaped Gaussian monocycle pulse. The spectrum output of the shaped Gaussian monocycle pulse directly meets the FCC's mask restrictions of the emission limits for indoor UWB system. The digital system of generating shaping Gaussian monocycle pulse may be implemented in the off-line operation to save the processing power. The pulse generator in the UWB transceiver has flexibility and scalability of selecting only one shaped pulse out of the data memory banks in which allocate all of the shaped Gaussian monocycle pulses with the different center frequencies. With a shaped pulse generator, an UWB transceiver does not need either a digital shaping transmission filter or an analog shaping transmission filter, with coupling to a D/A converter before or after, during a real-time operation.