Ultra wide bandwidth spread-spectrum communications system

A data communications method, comprising:

• receiving an input of high-speed digital data for communication;
• processing the high-speed digital data;
• generating a sequence of short impulse wavelets;
• modulating the sequence of short impulse wavelets in response to the processed high speed data so as to produce a modulated sequence of short impulse wavelets;
• responsive to each respective short impulse wavelet of the modulated sequence,
• (a) generating a plurality of time offset replicas of the respective short impulse wavelet;
• and
• (b) adding and subtracting the time offset replicas, in accord with a predetermined binary code, to form a code modulated group of impulse wavelets derived from the respective short impulse wavelet;
• transmitting the code modulated groups of impulse wavelet in sequence, as a modulated ultrawideband impulse signal.

A method of receiving high-speed data via ultrawideband impulse communication, comprising:

• receiving a modulated ultrawideband impulse signal transmitted from a remote location, wherein the received modulated ultrawideband impulse signal comprises group of code modulated short impulse wavelets;
• compressing the code modulated groups of short impulse wavelets in the received modulated ultrawideband impulse signal to recover a sequence of impulse wavelets modulated with bits obtained from the high-speed data from the received modulated ultrawideband impulse signal;
• generating a local ultrawideband impulse signal comprising a local sequence of short impulse wavelets;
• locking timing of the local modulated ultrawideband impulse signal to the recovered sequence of impulse wavelets;
• and
• correlating the locked local modulated ultrawidebend impulse signal to the recovered sequence of impulse wavelets to detect the bits obtained from the high-speed data.

A method of receiving high-speed data via ultrawideband impulse communication, comprising:

• receiving a modulated ultrawideband impulse signal transmitted from a remote location, wherein the received modulated ultrawidebend impulse signal comprises groups of code modulated short impulse wavelets;
• generating a local sequence of short impulse wavelets;
• for each respective short impulse wavelet contained in the local sequence, generating a plurality of time offset replicas of the respective short impulse wavelet modulated in accord with a code, and thereby forming a local ultrawideband impulse signal;
• locking timing of the local modulated ultrawideband impulse signal to the received modulated ultrawideband impulse signal;
• and
• correlating the locked local modulated ultrawideband impulse signal to the received modulated ultrawideband impulse signal to detect bits obtained from the high-speed data.

An ultrawideband impulse receiver, for receiving high-speed digital data, comprising:

• a receiver front end for receiving a modulated ultrawideband impulse signal transmitted from a remote location, wherein the received modulated ultrawideband impulse signal comprise groups of short impulse wavelets modulated in accord with a code;
• a matched filter for applying the code to the groups of short impulse wavelets to compress the groups of short impulse wavelets so as to form a sequence of individual short impulse wavelets;
• and
• a correlator for demodulating the sequence of individual short impulse wavelets to recover bits corresponding to the high-speed digital data,
• wherein the correlator comprises:
• means for generating a local ultrawideband impulse signal;
• and
• a delay lock loop for locking timing of the local modulated ultrawideband impulse signal to timing of the received modulated ultrawideband impulse signal, and for using the locked local modulated ultrawideband impulse signal to recover the bits corresponding to the high-speed digital data from the received modulated ultrawideband impulse signal.

An ultrawideband impulse receiver, for receiving high-speed digital data, comprising:

• a receiver front end for receiving a modulated ultrawideband impulse signal transmitted from a remote location, wherein the received modulated ultrawideband impulse signal comprises groups of short impulse wavelets modulated in accord with a code;
• and
• an impulse generator for generating a local sequence of short impulse wavelets;
• a code modulator, concatenated with the impulse generator, for converting each respective short impulse wavelet in the local modulated sequence into a respective group of short impulse wavelets and thereby forming a local modulated in accord with the code;
• and
• a delay lock loop for locking timing of the local modulated ultrawideband impulse signal to timing of the received modulated ultrawideband impulse signal, and for using the locked local modulated ultrawideband impulse signal to recover bits corresponding to the high-speed digital data from the received modulated ultrawideband impulse signal.

A data communications method, comprising:

• a step for producing a bit stream in response to high-speed digital data for communication;
• a step, responsive to the bit stream, for generating a sequence of short impulse wavelets, wherein the sequence of short impulse wavelets is modulated in accord with bits of the bit stream;
• responsive to each respective short impulse wavelet of the modulated sequence,
• (a) a step for generating a plurality of time offset replicas of the respective short impulse wavelet, and
• (b) a step for combining the time offset replicas, in accord with a code, to form a coded group of impulse wavelets derived from the respective short impulse wavelet;
• and
• a step for outputting the coded groups of impulse wavelets in sequence, as a modulated ultrawideband impulse signal.