Method and apparatus for digitizing a wide frequency bandwidth signal
First Claim
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1. A digitizer for digitizing a wide frequency bandwidth signal, comprising:
- (a) a plurality of filtering means for separating the wide frequency bandwidth signal into a plurality of narrow frequency bandwidth signals;
(b) a converting means, operatively coupled to each of the filtering means, for generating digitized samples of the narrow frequency bandwidth signals; and
(c) combining means, operatively coupled to the converting means, for combining the digitized samples and outputting a composite digitized signal having substantially the same spectral characteristics in digital form as the wide frequency bandwidth signal.
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Abstract
A method and apparatus are provided for digitizing a wide frequency bandwidth signal (105). The digitizing is accomplished by separating the wide frequency bandwidth signal (105) into a plurality of narrow frequency bandwidth signals with a plurality of filters (110). Subsequently, a converter (120) generates digitized samples of the narrow frequency bandwidth signals. Finally, a composite digitized signal (160) is generated by a combiner (150) from the digitized samples which substantially represents the wide frequency bandwidth signal (105).
78 Citations
10 Claims
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1. A digitizer for digitizing a wide frequency bandwidth signal, comprising:
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(a) a plurality of filtering means for separating the wide frequency bandwidth signal into a plurality of narrow frequency bandwidth signals; (b) a converting means, operatively coupled to each of the filtering means, for generating digitized samples of the narrow frequency bandwidth signals; and (c) combining means, operatively coupled to the converting means, for combining the digitized samples and outputting a composite digitized signal having substantially the same spectral characteristics in digital form as the wide frequency bandwidth signal.
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2. A method for digitizing a wide frequency bandwidth signal, comprising:
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(a) separating the wide frequency bandwidth signal into first and second narrow frequency bandwidth signals; (b) generating first and second digitized samples of the first and second narrow frequency bandwidth signals, respectively; and (c) generating a composite digitized signal from the first and second digitized samples which has substantially the same spectral characteristics in digital form as the wide frequency bandwidth signal. - View Dependent Claims (3, 4)
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5. A digitizer for digitizing an analog signal, comprising:
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(a) first and second frequency selectors operable for selecting differing frequency portions of the analog signal and outputting first and second narrowband signals, respectively; (b) first and second converters coupled to the first and second frequency selectors, respectively, and operable for generating a first and second digitized signal of the first and second narrowband signals, respectively; and (c) a combiner coupled to the first and second converters and operable for combining the first and second digitized signals into a composite digital signal having substantially the same spectral characteristics in digital form as the analog signal. - View Dependent Claims (6, 7, 8)
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9. A digitizer for digitizing a composite wideband analog signal formed of plural analog communication signals, comprising:
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(a) plural filter means for separating the composite analog signal into a plurality of narrowband signals, at least a first subset of the plural filter means together passing a first of the plural analog communication signals; (b) plural converting means, operatively coupled to the plural filter means, for generating digitized samples of the plurality of narrowband signals, including a first subset of converting means operatively coupled to the first subset of plural filter means; (c) combining means, operatively coupled to the plural converting means, for combining the digitized samples and outputting at least a first digitized communication signal having substantially the same spectral characteristics in digital form as the first of the plural analog communication signals. - View Dependent Claims (10)
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Specification