Ultra-wideband communications system devices
First Claim
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1. An ultra-wideband receiver comprising:
- a filter coupled to a signal input, the filter to pass signals in a frequency band from a received signal provided by the signal input;
an amplifier coupled to the filter, the amplifier to bring the passed signals to a signal level compatible with circuitry in the receiver;
a demodulating unit coupled to the amplifier, the demodulating unit containing circuitry to bring the passed signals to an internal frequency, thereby providing a demodulated signal at an output of the demodulating unit;
a timing generating unit coupled to the demodulating unit, the timing generating unit containing circuitry to generate samples of the demodulated signal at different timing offsets, wherein the timing generating unit comprises a pair of sample/hold circuits having inputs coupled to the output of the demodulating unit, and wherein a first sample/hold circuit produces an on-time sample of the demodulated signal and a second sample/hold circuit produces an early and a late sample of the demodulated signal; and
a converter coupled to the timing generating unit, the converter to convert continuous samples produced by the timing generating unit into discrete samples.
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Abstract
System for ultra-wideband communications providing high data rates over an extended operating range in the presence of interferers. A preferred embodiment comprises an ultra-wideband (UWB) device that makes use of a portion of the UWB frequency range to help provide good performance in the presence of interferers. Additionally, since only a portion of the UWB frequency range is used, multiple devices can simultaneously transmit and receive by using different portions of the UWB frequency range.
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Citations
27 Claims
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1. An ultra-wideband receiver comprising:
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a filter coupled to a signal input, the filter to pass signals in a frequency band from a received signal provided by the signal input; an amplifier coupled to the filter, the amplifier to bring the passed signals to a signal level compatible with circuitry in the receiver; a demodulating unit coupled to the amplifier, the demodulating unit containing circuitry to bring the passed signals to an internal frequency, thereby providing a demodulated signal at an output of the demodulating unit; a timing generating unit coupled to the demodulating unit, the timing generating unit containing circuitry to generate samples of the demodulated signal at different timing offsets, wherein the timing generating unit comprises a pair of sample/hold circuits having inputs coupled to the output of the demodulating unit, and wherein a first sample/hold circuit produces an on-time sample of the demodulated signal and a second sample/hold circuit produces an early and a late sample of the demodulated signal; and a converter coupled to the timing generating unit, the converter to convert continuous samples produced by the timing generating unit into discrete samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An ultra-wideband receiver comprising:
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a filter coupled to a signal input, the filter to pass signals in a frequency band from a received signal provided by the signal input; an amplifier coupled to the filter, the amplifier to bring the passed signals to a signal level compatible with circuitry in the receiver; a demodulating unit coupled to the amplifier, the demodulating unit containing circuitry to bring the passed signals to an internal frequency; a timing generating unit coupled to the demodulating unit, the timing generating unit containing circuitry to generate samples of the passed signals at different timing offsets; a converter coupled to the timing generating unit, the converter to convert continuous samples produced by the timing generating unit into discrete samples; a despreading unit to remove a spreading code applied to a transmitted signal; an adjust timing circuit coupled to the despreading unit, the adjust timing circuit containing circuitry to control sampling of the converter; a multipath processing unit coupled to the despreading unit, the multipath processing unit containing circuitry to combine multiple copies of the transmitted signal in the signals into a single signal; and a decoding unit coupled to the multipath processing unit, the decoding unit containing circuitry to remove encoding present in the single signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An ultra-wideband device comprising:
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an antenna to transmit and receive signals; a switch coupled to the antenna, the switch to control access to the antenna; a receiver coupled to the switch, the receiver comprising a filter coupled to the switch, the filter to pass signals in a frequency band from a received signal provided by the switch; an amplifier coupled to the filter, the amplifier to bring the passed signals to a signal level compatible with circuitry in the receiver; a demodulating unit coupled to the amplifier, the demodulating unit containing circuitry to bring the passed signals to an internal frequency, thereby providing a demodulated signal at an output of the demodulating unit; a timing generating unit coupled to the demodulating unit, the timing generating unit containing circuitry to generate samples of the demodulated signal at different timing offsets, wherein the timing generating unit comprises a pair of sample/hold circuits having inputs coupled to the output of the demodulating unit, and wherein a first sample/hold circuit produces an on-time sample of the demodulated signal and a second sample/hold circuit produces an early and a late sample of the demodulated signal; and a converter coupled to the timing generating unit, the converter to convert continuous samples produced by the timing generating unit into discrete samples; the ultra-wideband device further comprising a transmitter coupled to the switch, the transmitter comprising an encoding unit coupled to a data source, the encoding unit containing circuitry to apply a code to data provided by the data source; a spreading unit coupled to the encoding unit, the spreading unit containing circuitry to apply a spreading code to the data; a pulse shaping unit coupled to the spreading unit, the pulse shaping unit containing circuitry to apply a mask of a desired pulse with desired frequency characteristics to the encoded and spread data; a modulating unit coupled to the pulse shaping unit, the modulating unit to apply a carrier frequency to the shaped, encoded, and spread data; and a filter coupled to the modulating unit and the switch, the filter to ensure that the modulated, shaped, encoded, and spread data fit within a desired frequency range. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification