Ultra-wideband high data-rate communication apparatus and methods
View Patent ↗An RF transmitter includes a reference signal generator, a signal generator, and a mixer. The reference signal generator provides a reference signal that has a prescribed or desired frequency. The signal generator provides an operating signal in response to a selection signal. The operating signal has a frequency that equals the frequency of the reference signal multiplied by a number. The mixer mixes the operating signal with another signal to generate a transmission signal. An RF receiver includes a first mixer, a second mixer, an integrator/sampler, and a signal generator. The first mixer receives as its inputs an input RF signal and a second input signal, and mixes its input signals to generate a mixed signal. The integrator/sampler receives the mixed signal and processes it to provide an output signal. The signal generator provides an operating signal in response to a selection signal. The operating signal has a frequency equal to the frequency of a reference signal, multiplied by a number. The second mixer mixes the operating signal with a template signal to generate the second input signal of the first mixer.
1. A method for transmitting, comprising:
generating a reference signal having a first frequency;
generating a first operating signal from the reference signal, wherein the first operating signal has a second frequency which is a multiple of the first frequency and the second frequency is based on a selection signal;
generating a first transmission signal from the first operating signal and a first signal comprising data;
detecting interference; and
based upon the detection of the interference, varying the selection signal to vary the second frequency to allow the first transmission signal to avoid the detected interference, wherein the selection signal is varied according to a predetermined PSD mask, the PSD mask corresponding to a channel frequency and a timing plan configured to generate the transmission signal on a plurality of harmonic frequencies in a predetermined order such that a transmission time on any one of the plurality of harmonic frequencies lasts for a predetermined time.
2. The method of claim 1 , further comprising;
generating a second operating signal from the reference signal wherein the operating signal has a third frequency distinct from the second frequency, the third frequency is a multiple of the first frequency and the third frequency is based on the selection signal; and
generating a second transmission signal from the second operating signal and the first signal.
3. The method of claim 1 , wherein the selection signal is varied to allow the frequency of the first operating signal to vary in accordance with a channel frequency and timing plan.
4. The method of claim 2 , wherein the interference is multipath interference.
5. A method for transmitting, comprising:
generating a reference signal having a first frequency;
generating a plurality of operating signals from the reference signal, wherein each operating signal has a distinct operating frequency which is a multiple of the first frequency, and the operating frequencies are based on a selection signal;
generating transmission signals from the operating signals and a first signal comprising data;
detecting interference; and
based upon the detection of the interference, varying the selection signal and the operating signals generated to allow a power spectral density (PSD) of the transmission signals to conform to a PSD profile to avoid the detected interference, wherein the selection signal is varied according to a predetermined PSD mask, the PSD mask corresponding to a channel frequency and a timing plan configured to generate the transmission signal on the one or more of the operating frequencies in a predetermined order such that a transmission time on the one or more of the operating frequencies lasts for a predetermined time.
6. The method of claim 5 , wherein the PSD profile can vary over time.
7. A method for transmitting, comprising:
generating a reference signal having a first frequency;
generating a first operating signal from the reference signal, wherein the first operating signal has a second frequency which is a multiple of the first frequency and the second frequency is based on a selection signal;
generating a first transmission signal from the operating signal and a first signal comprising data;
detecting interference; and
based upon the detection of the interference, varying selection signal according to a predetermined PSD mask to vary the second frequency in accordance with a modifiable channel frequency and timing plan, said channel frequency and timing plan configured to generate the first transmission signal on one or more of a plurality of harmonic frequencies in a predetermined order such that a transmission time on any one of the plurality of harmonic frequencies lasts for a predetermined time.
8. The method of claim 7 , wherein the frequencies used in conjunction with the channel frequency and timing plan can be modified.
9. The method of claim 7 , wherein the channel frequency and timing plan can be modified to allow the first transmission signal to avoid interference.
10. The method of claim 9 , wherein the modification of the channel frequency and timing plan occurs automatically.