Receiver capable of concurrently collecting dual band signals, and method thereof
First Claim
1. A receiver for receiving a first communication signal and a second communication signal, comprising:
- a first mixer, for down-converting an input radio-frequency signal comprising the first communication signal and the second communication signal into a first low-frequency signal according to a first local oscillating signal;
a second mixer, for down-converting the input radio-frequency signal into a second low-frequency signal according to a second local oscillating signal; and
a processing circuit, coupled to the first mixer and the second mixer, for generating at least one phase-shifted low-frequency signal according to at least the first low-frequency signal, for extracting signal components of the first communication signal by rejecting signal components of the second communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for extracting signal components of the second communication signal by rejecting signal components of the first communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal;
wherein the first communication signal is situated in a first frequency range different from a second frequency range in which the second communication signal is situated, and the processing circuit comprises;
a first polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the second communication signal and extracting the first communication signal according to the first and second low-frequency signals; and
a second polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the first communication signal and extracting the second communication signal according to the first and second low-frequency signals.
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Accused Products
Abstract
A receiver of a GNSS system is provided. The receiver comprises two mixers and a processing circuit. The first mixer down-converts an input radio-frequency signal comprising a first GNSS signal and a second GNSS signal into a first low-frequency signal. The second mixer down-converts the input radio-frequency signal into a second low-frequency signal. The processing circuit generates at least one phase-shifted low-frequency signal according to at least the first low-frequency signal, extract signal components of the first GNSS signal by rejecting signal components of the second GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal, and extract signal components of the second GNSS signal by rejecting signal components of the first GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal. The first and second GNSS signals are situated in different frequency ranges.
12 Citations
6 Claims
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1. A receiver for receiving a first communication signal and a second communication signal, comprising:
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a first mixer, for down-converting an input radio-frequency signal comprising the first communication signal and the second communication signal into a first low-frequency signal according to a first local oscillating signal; a second mixer, for down-converting the input radio-frequency signal into a second low-frequency signal according to a second local oscillating signal; and a processing circuit, coupled to the first mixer and the second mixer, for generating at least one phase-shifted low-frequency signal according to at least the first low-frequency signal, for extracting signal components of the first communication signal by rejecting signal components of the second communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for extracting signal components of the second communication signal by rejecting signal components of the first communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; wherein the first communication signal is situated in a first frequency range different from a second frequency range in which the second communication signal is situated, and the processing circuit comprises; a first polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the second communication signal and extracting the first communication signal according to the first and second low-frequency signals; and a second polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the first communication signal and extracting the second communication signal according to the first and second low-frequency signals. - View Dependent Claims (2, 3)
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4. A method for receiving a first communication signal and a second communication signal, comprising:
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down-converting an input radio-frequency signal comprising the first communication signal and the second communication signal into a first low-frequency signal according to a first local oscillating signal; down-converting the input radio-frequency signal into a second low-frequency signal according to a second local oscillating signal; generating at least one phase-shifted low-frequency signal according to at least the first low-frequency signal; using a first polyphase filter to receive the at least one phase-shifted low-frequency signal and the second low-frequency signal, and to extract signal components of the first communication signal by rejecting signal components of the second communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; and using a second polyphase filter to receive the at least one phase-shifted low-frequency signal and the second low-frequency signal, and to extract signal components of the second communication signal by rejecting signal components of the first communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; wherein the first communication signal is situated in a first frequency range different from a second frequency range in which the second communication signal is situated. - View Dependent Claims (5)
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6. A receiver for receiving a first GNSS signal and a second GNSS signal, comprising:
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a first mixer, for down-converting an input radio-frequency signal comprising the first GNSS signal and the second GNSS signal into a first low-frequency signal according to a first local oscillating signal; a second mixer, for down-converting the input radio-frequency signal into a second low-frequency signal according to a second local oscillating signal; and a processing circuit, coupled to the first mixer and the second mixer, for generating at least one phase-shifted low-frequency signal according to at least the first low-frequency signal, for extracting signal components of the first GNSS signal by rejecting signal components of the second GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for extracting signal components of the second GNSS signal by rejecting signal components of the first GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; wherein the first GNSS signal is situated in a first frequency range different from a second frequency range in which the second GNSS signal is situated, and the processing circuit comprises; a first polyphase filter, coupled to the first and second mixer, for receiving the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for rejecting the second GNSS signal and extracting the first GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; and a second polyphase filter, coupled to the first and second mixer, for receiving the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for rejecting the first GNSS signal and extracting the second GNSS signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal.
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Specification