Pulse shaper design for ultra-wideband communications
First Claim
1. A method comprising generating digitally filtered ultra-wide band (UWB) pulses to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more narrow band interference (NBI) frequency bands of the UWB spectrum.
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Abstract
The invention provides an ultra-wideband (UWB) transmitter and various techniques for generating digitally filtered UWB pulses that substantially maximize power and bandwidth in one or more frequency bands while allowing narrow-band interference (NBI) to be avoided, e.g. interference to and from wireless local area networks (WLANs). In particular, the UWB transmitter utilizes a digital filter to generate digitally filtered UWB pulses to substantially maximize power and bandwidth in the Federal Communications Commission (FCC) spectral mask for UWB communications. In one embodiment, the invention provides a method comprising generating digitally filtered ultra-wide band (UWB) pulses to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more NBI frequency bands of the UWB spectrum. The invention may be implemented without modifying the analog components of existing UWB transmitters.
75 Citations
64 Claims
- 1. A method comprising generating digitally filtered ultra-wide band (UWB) pulses to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more narrow band interference (NBI) frequency bands of the UWB spectrum.
- 14. A digital filter of an ultra-wideband (UWB) transmitter that generates digitally filtered UWB pulses to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more narrow band interference (NBI) frequency bands of the UWB spectrum.
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29. An ultra-wideband (UWB) transmitter comprising:
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a symbol generator that generates a stream of information bearing symbols;
a digital filter that digitally filters the stream of information bearing symbols according to a set of tap coefficients to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more narrow band interference (NBI) frequency bands of the UWB spectrum;
a timer that processes the stream of information bearing symbols in accordance with a pulse position modulation (PPM) scheme; and
a pulse generator that generates digitally filtered ultra-wideband (UWB) pulses based on the digitally filtered stream of information bearing symbols. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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- 43. A method comprising digitally filtering ultrawide band (UWB) pulses to reduce power in one or more narrow band interference (NBI) frequency bands of a governmentally defined UWB spectrum.
- 51. A digital filter of an ultrawide band (UWB) transmitter that reduces power of a UWB pulse in one or more narrow band interference (NBI) frequency bands of a governmentally defined UWB spectrum.
- 58. An ultrawide band (UWB) transmitter including a digital filter that reduces power of a UWB pulse in one or more narrow band interference (NBI) frequency bands of a governmentally defined UWB spectrum.
Specification