Wideband frequency hopping spread spectrum receivers and related methods
First Claim
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1. A wideband frequency hopping spread spectrum receiver, comprising:
- sampling circuitry configured to receive a receive signal at a radio frequency (fRF), to receive sampling signals at a sample clock frequency (fS) and to generate sampled output signals having a plurality of frequency components, the frequency components including frequencies at two or more harmonics of fS plus and minus fRF, and the frequency components including at least one frequency component at an intermediate frequency (fIF); and
filter circuitry configured to provide a filter passband frequency range including the intermediate frequency (fIF), the filter circuitry further configured to receive the sampled output signals and to have an output signal that includes the frequency component of the sampled output signals at the intermediate frequency (fIF).
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Abstract
Systems and methods are disclosed that provide ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions for receive architectures. These UWB-FHSS receive architectures can receive signals transmitted over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized.
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Citations
21 Claims
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1. A wideband frequency hopping spread spectrum receiver, comprising:
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sampling circuitry configured to receive a receive signal at a radio frequency (fRF), to receive sampling signals at a sample clock frequency (fS) and to generate sampled output signals having a plurality of frequency components, the frequency components including frequencies at two or more harmonics of fS plus and minus fRF, and the frequency components including at least one frequency component at an intermediate frequency (fIF); and filter circuitry configured to provide a filter passband frequency range including the intermediate frequency (fIF), the filter circuitry further configured to receive the sampled output signals and to have an output signal that includes the frequency component of the sampled output signals at the intermediate frequency (fIF). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for receiving wideband frequency hopping spread spectrum signals, comprising:
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sampling a receive signal using sampling signals at a sample clock frequency (fS) to generate sampled output signals having a plurality of frequency components, the frequency components including frequencies at two or more harmonics of fS plus and minus fRF, and the frequency components including at least one frequency component at an intermediate frequency (fIF); and filtering the sampled signals with a filter passband frequency range around an intermediate frequency (fIF) to generate an output signal that includes the frequency component of the sampled output signals at the intermediate frequency (fIF). - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification