Method and apparatus for RF signal demodulation
First Claim
1. A radio frequency (RF) receiver, comprising:
- an antenna, receiving an RF signal;
a low noise amplifier (LNA), coupled to the antenna, amplifying the RF signal;
a down converter, coupled to the LNA, down converting the RF signal to generate an in-phase baseband signal and a quadrature baseband signal;
a first analog to digital converter (ADC), coupled to the down converter, digitizing the in-phase baseband signal to an in-phase digital signal;
a second analog to digital converter (ADC), coupled to the down converter, digitizing the quadrature baseband signal to a quadrature digital signal; and
a digital up converter, coupled to the first and second ADCs, up converting the in-phase digital signal and quadrature digital signal to generate an intermediate frequency (IF) signal.
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Abstract
A radio frequency (RF) receiver is provided, comprising an antenna, a low noise amplifier, a down converter, a first analog to digital converter (ADC), a second ADC, a digital up converter. The antenna receives an RF signal, and the LNA coupled to the antenna amplifies the RF signal. The down converter, coupled to the LNA, down converts the RF signal to generate an in-phase baseband signal and a quadrature baseband signal. The first ADC, coupled to the down converter, digitizes the in-phase baseband signal to an in-phase digital signal. The second ADC, coupled to the down converter, digitizes the quadrature baseband signal to a quadrature digital signal. The digital up converter, coupled to the first and second ADCs, up converts the in-phase digital signal and quadrature digital signal to generate an intermediate frequency (IF) signal.
18 Citations
16 Claims
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1. A radio frequency (RF) receiver, comprising:
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an antenna, receiving an RF signal;
a low noise amplifier (LNA), coupled to the antenna, amplifying the RF signal;
a down converter, coupled to the LNA, down converting the RF signal to generate an in-phase baseband signal and a quadrature baseband signal;
a first analog to digital converter (ADC), coupled to the down converter, digitizing the in-phase baseband signal to an in-phase digital signal;
a second analog to digital converter (ADC), coupled to the down converter, digitizing the quadrature baseband signal to a quadrature digital signal; and
a digital up converter, coupled to the first and second ADCs, up converting the in-phase digital signal and quadrature digital signal to generate an intermediate frequency (IF) signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A demodulation method, comprising:
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receiving and amplifying an RF signal;
down converting the RF signal to baseband to generate an in-phase baseband signal and a quadrature baseband signal;
digitizing the in-phase baseband signal and quadrature baseband signal to obtain an in-phase digital signal and quadrature digital signal; and
up converting the in-phase digital signal and quadrature digital signal to an intermediate frequency, thus generating an IF signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification