Ultra-wideband high data-rate communication apparatus and associated 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 radio-frequency (RF) transmitter, comprising:
a reference signal generator, the reference signal generator configured to provide a reference signal having a frequency;
a signal generator coupled to the reference signal generator and operable to receive the reference signal, the signal generator configured to provide an operating signal based on a selection signal, wherein said selection signal varies according to a predetermined channel frequency and timing plan, wherein the operating signal has a frequency equal to the frequency of the reference signal multiplied by a number; and
a first mixer operable to receive the operating signal, the first mixer configured to mix the operating signal with a first signal comprising data to generate a transmission signal, wherein the predetermined channel frequency and timing plan is configured to cause the transmission of the transmission signal on each of a plurality of predetermined harmonic frequencies in a predetermined order, the transmission time duration on any one of the plurality of harmonic frequencies lasting for a predetermined time duration.
2. The transmitter according to claim 1 , further comprising a second mixer, the second mixer configured to mix an input data signal with a second signal to generate the first signal.
3. The transmitter according to claim 2 , further comprising a signal shaping circuitry, the signal shaping circuitry configured to generate the second signal by shaping the reference signal.
4. The transmitter according to claim 3 , wherein the input data signal comprises a modulated data signal.
5. The transmitter according to claim 4 , wherein the input data signal comprises a binary phase shift keyed (BPSK) signal.
6. The transmitter according to claim 4 , wherein the input data signal comprises a quadrature amplitude modulated (QAM) signal.
7. The transmitter according to claim 4 , wherein the input data signal comprises a quadrature phase shift keyed (QPSK) signal.
8. The transmitter according to claim 3 , wherein the signal shaping circuitry is configured to full-wave rectify the reference signal to generate the second signal.
9. The transmitter according to claim 8 , wherein the reference signal comprises a sinewave signal.
10. The transmitter according to claim 3 , wherein the signal shaping circuitry is configured to generate a Gaussian-shaped signal as the second signal.
11. The transmitter according to claim 3 , wherein the signal shaping circuitry comprises a filter.
12. The transmitter according to claim 1 , further comprising a filter, the filter configured to receive the transmission signal, the filter further configured to generate a filtered transmission signal.