Saw-less receiver with offset RF frequency translated BPF
First Claim
1. A surface acoustic wave (SAW)-less receiver comprises:
- a front end module (FEM) interface module operable to receive an inbound radio frequency (RF) signal;
an RF to intermediate frequency (IF) receiver section that includes;
a frequency translated bandpass filter (FTBPF) includes;
a switching network; and
a complex baseband filter having an offset baseband filter response, wherein the switching network is operable to frequency translate the offset baseband filter response to an RF frequency response such that the FTBPF filters the inbound RF signal by passing, substantially unattenuated, a desired RF signal component and by attenuating at least one of;
an image signal component and an undesired signal component to produce a filtered inbound RF signal;
a low noise amplifier module (LNA) operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal; and
a mixing section operable to mix the amplified inbound RF signal with a local oscillation to produce an inbound IF signal; and
a receiver IF to baseband section operable to convert the inbound IF signal into one or more inbound symbol streams.
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Accused Products
Abstract
A SAW-less receiver includes a front end module (FEM) interface module, an RF to IF section, and an IF to baseband section. The RF to IF section includes a frequency translated bandpass filter (FTBPF), an LNA, and a mixing section. The FTBPF includes a switching network and a complex baseband filter having an offset baseband filter response. The switching network is operable to frequency translate the offset baseband filter response to an RF frequency response such that the FTBPF filters the inbound RF signal by passing, substantially unattenuated, a desired RF signal component and by attenuating an image signal component and/or an undesired signal component. The LNA amplifies the filtered inbound RF signal and the mixing section mixes the amplified inbound RF signal with a local oscillation to produce an inbound IF signal. The IF to baseband section converts the inbound IF signal into an inbound symbol stream(s).
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Citations
23 Claims
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1. A surface acoustic wave (SAW)-less receiver comprises:
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a front end module (FEM) interface module operable to receive an inbound radio frequency (RF) signal; an RF to intermediate frequency (IF) receiver section that includes; a frequency translated bandpass filter (FTBPF) includes; a switching network; and a complex baseband filter having an offset baseband filter response, wherein the switching network is operable to frequency translate the offset baseband filter response to an RF frequency response such that the FTBPF filters the inbound RF signal by passing, substantially unattenuated, a desired RF signal component and by attenuating at least one of;
an image signal component and an undesired signal component to produce a filtered inbound RF signal;a low noise amplifier module (LNA) operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal; and a mixing section operable to mix the amplified inbound RF signal with a local oscillation to produce an inbound IF signal; and a receiver IF to baseband section operable to convert the inbound IF signal into one or more inbound symbol streams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A surface acoustic wave (SAW)-less receiver comprises:
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a front end module (FEM) interface module operable to receive an inbound radio frequency (RF) signal; an RF to intermediate frequency (IF) receiver section operable to; frequency translate an offset baseband filter response to an RF frequency response; filter the inbound RF signal in accordance with the RF frequency response to produce a filtered inbound RF signal having a desired RF signal component of the inbound RF signal and at least one of;
an attenuated image signal component of the inbound RF signal and an attenuated undesired signal component of the inbound RF signal;amplify the filtered inbound RF signal to produce an amplified inbound RF signal; and mix the amplified inbound RF signal with a local oscillation to produce an inbound IF signal; and a receiver IF to baseband section operable to mix the inbound IF signal with a second local oscillation to produce one or more inbound symbol streams. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A radio frequency (RF) to intermediate frequency (IF) receiver section comprises:
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a frequency translated bandpass filter (FTBPF) includes; a switching network; and a complex baseband filter having an offset baseband filter response, wherein the switching network is operable to frequency translate the offset baseband filter response to an RF frequency response such that the FTBPF filters an inbound RF signal by passing, substantially unattenuated, a desired RF signal component and by attenuating at least one of;
an image signal component and an undesired signal component to produce a filtered inbound RF signal;a low noise amplifier module (LNA) operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal; and a mixing section operable to mix the amplified inbound RF signal with a local oscillation to produce an inbound IF signal. - View Dependent Claims (20, 21, 22, 23)
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Specification