SELECTIVE-SAMPLING RECEIVER
First Claim
1. A method for removing unwanted components from a signal, the method comprising:
- receiving a signal that includes a desired component and an unwanted component;
receiving timing information of the desired component;
selective sampling the signal with the timing information or sampling the signal after the demodulation of the sum and delta channels to recover the unwanted component with a selective sampling receiver or a subtraction stage; and
determining the desired component from the signal using the unwanted component.
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Abstract
A receiver that selectively samples a received signal in order to suppress an interference component of the signal while recovering a desired component. The selective sampling may be accomplished by low cost, low complex analog or digital circuitry. The receiver includes a first input that receives a first signal, including a desired signal component and an interference signal component and a second input that receives a second signal including the interference component only. The first and second signals are then provided to the sampling circuitry. First, the phase of the interference component of the both the first and second signals is aligned. Next, the points in a wave cycle that the second signal is at a power minimum are detected. Finally, first signal is sampled close to the point when the second signal is at the power minimum to recover the desired signal component and suppress the interference component.
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Citations
21 Claims
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1. A method for removing unwanted components from a signal, the method comprising:
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receiving a signal that includes a desired component and an unwanted component; receiving timing information of the desired component; selective sampling the signal with the timing information or sampling the signal after the demodulation of the sum and delta channels to recover the unwanted component with a selective sampling receiver or a subtraction stage; and determining the desired component from the signal using the unwanted component. - View Dependent Claims (2, 3, 4, 5, 8, 21)
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6. A method for raising a sampling ratio of samples in a selective sampling receiver to exceed a Nyquist sampling rate, the method comprising:
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receiving first and second signals; allowing a higher frequency signal having a larger amplitude than the first and second signals to coherently generate mixed first and second signals; and sampling the mixed first and second signals at zero crossings, wherein an amplitude of a desired signal is offset by an instantaneous amplitude of the desired signal, wherein the desired signal is included in one of the first and second signals. - View Dependent Claims (7)
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9. A method for using a bandwidth to transmit multiple data streams, the method comprising:
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sending multiple data streams over a network; receiving the multiple data streams with a receiver; and separating the multiple data streams, wherein the receiver separates each of the multiple streams. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19, 20)
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- 10. The method of claim 10, further comprising sending the multiple data streams over multiple frequency channels.
Specification