Wideband receiver for wireless communication system and method for controlling the same
First Claim
1. A wideband receiver for a wireless communication system, the wideband receiver comprising:
- a receive path having a mixer for receiving a Radio Frequency (RF) signal having a frequency fSG and for converting the RF signal into an Intermediate Frequency (IF) signal having a frequency fIF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency fLO1, and at least one Phase Locked Loop (PLL) for providing the first local oscillation signal to the mixer; and
a control block for determining whether a half-IF signal having a center frequency of fSG−
fIF/2 exists in the IF signal, and when the half-IF signal exists, for controlling the at least one PLL to generate a second local oscillation signal having a second local oscillation frequency fLO2 greater than the first local oscillation frequency fLO1.
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Accused Products
Abstract
A wideband receiver for a wireless communication system and a method for controlling the same are provided. In the wideband receiver for a wireless communication system, a receive path includes a mixer for receiving a Radio Frequency (RF) signal having a frequency fSG and for converting the RF signal into an Intermediate Frequency (IF) signal having a frequency fIF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency fLO1, and at least one Phase Locked Loop (PLL) for providing the local oscillation signal to the mixer. A control block determines whether a half-IF signal having a center frequency of fSG−fIF/2 exists in the IF signal, and when the half-IF signal exists, controls the at least one PLL to generate a second local oscillation signal having a second local oscillation frequency fLO2 greater than the first local oscillation frequency fLO1.
40 Citations
13 Claims
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1. A wideband receiver for a wireless communication system, the wideband receiver comprising:
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a receive path having a mixer for receiving a Radio Frequency (RF) signal having a frequency fSG and for converting the RF signal into an Intermediate Frequency (IF) signal having a frequency fIF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency fLO1, and at least one Phase Locked Loop (PLL) for providing the first local oscillation signal to the mixer; and a control block for determining whether a half-IF signal having a center frequency of fSG−
fIF/2 exists in the IF signal, and when the half-IF signal exists, for controlling the at least one PLL to generate a second local oscillation signal having a second local oscillation frequency fLO2 greater than the first local oscillation frequency fLO1. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling a wideband receiver for a wireless communication system, the method comprising:
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detecting an Intermediate Frequency (IF) signal from a receive path having a mixer for receiving a Radio Frequency (RF) signal having a frequency fSG and converting the RF signal into the IF signal having a frequency fIF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency fLO1; determining whether a half-IF signal having a center frequency of fSG−
fIF/2 exists in the IF signal; andwhen the half-IF signal exists, providing a second local oscillation signal to the receive path, the second local oscillation signal having a second local oscillation frequency fLO2 greater than the first local oscillation frequency. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A wideband receiver for a wireless communication system, the wideband receiver comprising:
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a receive path for receiving a Radio Frequency (RF) signal and for generating a first local oscillation frequency based on the RF signal and an Intermediate Frequency (IF) signal; and a control block for determining whether a half-IF signal is present in the IF signal, and for controlling the receive path to generate a second local oscillation frequency greater than the first local oscillation frequency when it is determined that the half-IF signal is present in the IF signal.
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Specification