Leakage nulling receiver correlator structure and method for ultra wide bandwidth communication system
First Claim
1. A receiver correlator structure comprising:
- a mixer receiving an ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions, and mixing the ultra wide bandwidth signal with a local ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions correlated to the sequence of wavelets of particular shapes and positions of the received ultra wide bandwidth signal;
a bandpass filter, coupled to the mixer output, receiving the mixed ultra wide bandwidth signal, removing the DC components therefrom, and outputting a resultant signal, wherein an initial peak of the resultant signal is proportional to energy included in the mixed ultra wide bandwidth signal and post signal decay of the resultant signal to zero occurs in TS time; and
a convertor, coupled to the bandpass filter, converting the resultant signal at the initial peak to a digital output signalwherein TS is a center-to-center clock period for the wavelets in the local ultra wide bandwidth signal.
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Accused Products
Abstract
A receiver correlator structure for an ultra wide bandwidth communication system includes an antenna, a mixer, a bandpass filter, and a convertor. The receiver receives, via the antenna, an ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions, and transmits the received ultra wide bandwidth signal to the mixer. The mixer also receives and mixes with the received ultra wide bandwidth signal a local ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions correlated to the received ultra wide bandwidth signal. The bandpass filter removes the DC components from the mixed signal, and provides the resultant signal to the convertor. The receiver structure eliminates the local ultra wide bandwidth signal AC bias and DC bias terms and 1/f noise, yet detects long sequences of logical 1'"'"'s and 0'"'"'s, and allows operation with reduced bandwidth convertors.
8 Citations
22 Claims
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1. A receiver correlator structure comprising:
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a mixer receiving an ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions, and mixing the ultra wide bandwidth signal with a local ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions correlated to the sequence of wavelets of particular shapes and positions of the received ultra wide bandwidth signal; a bandpass filter, coupled to the mixer output, receiving the mixed ultra wide bandwidth signal, removing the DC components therefrom, and outputting a resultant signal, wherein an initial peak of the resultant signal is proportional to energy included in the mixed ultra wide bandwidth signal and post signal decay of the resultant signal to zero occurs in TS time; and a convertor, coupled to the bandpass filter, converting the resultant signal at the initial peak to a digital output signal wherein TS is a center-to-center clock period for the wavelets in the local ultra wide bandwidth signal.
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2. A receiver correlator structure comprising:
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a mixer configured to mix a received ultra wide bandwidth signal with a local ultra wide bandwidth signal to generate a mixed ultra wide bandwidth signal, the received ultra wide bandwidth signal comprising a first sequence of wavelets, and the local ultra wide bandwidth signal comprising a second sequence of wavelets; a bandpass filter, coupled to the mixer output, generating a filter signal, the bandpass filter being configured to; generate a sequence of peaks corresponding to and proportional to the energy in each of a sequence of mixed wavelets in the mixed ultra wide bandwidth signal, remove DC components from the mixed ultra wide bandwidth signal with a settling time on the order of a time between adjacent peaks; and a sampler, coupled to the bandpass filter, configured to sample the filtered signal at the peaks to generate a sampled signal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A receiver correlator structure comprising:
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a mixer configured to mix a received ultra wide bandwidth signal with a local ultra wide bandwidth signal to generate a mixed ultrawide bandwidth signal, the received ultra wide bandwidth signal comprising a first sequence of wavelets, and the local ultra wide bandwidth signal comprising a second sequence of wavelets; a bandpass filter, coupled to the mixer output, generating a filter signal, the bandpass filter being configured to; generate a sequence of peaks corresponding to and proportional to the energy in each of a sequence of mixed wavelets in the mixed ultra wide bandwidth signal, remove DC components from the mixed ultra wide bandwidth signal with a settling time on the order of a time between adjacent peaks; and a converter, coupled to the bandpass filter, configured to convert the filtered signal at the peaks to a digital output signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of operating an ultra wide bandwidth system, comprising:
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receiving a first ultra wide bandwidth signal comprising a first sequence of wavelets; generating a second ultra wide bandwidth signal comprising a second sequence of wavelets; mixing the first ultra wide bandwidth signal with the second ultra wide bandwidth signal to generate a mixed ultra wide bandwidth signal; generating a sequence of peaks corresponding to and proportional to the energy in each of a sequence of mixed wavelets in the mixed ultra wide bandwidth signal; and removing DC components from the mixed ultra wide bandwidth signal with a settling time on the order of a time between adjacent peaks. - View Dependent Claims (19, 20, 21, 22)
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Specification