Equalizing device and method capable of WLAN applications
First Claim
Patent Images
1. A communication system capable of conducting DC-offset mitigation, the system comprising:
- an input analog-to-digital converter configured to receive an input signal and produce a digital signal from the input signal; and
a DC-offset estimation device coupled with the input analog-to-digital converter, the DC-offset estimation device being configured to produce a quantized DC-offset estimate from the digital signal, wherein the input analog-to-digital converter is configured to receive the quantized DC-offset estimate and to adjust a DC offset of the digital signal.
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Abstract
A communication system may include an equalizing device for DC-offset mitigation. The system includes: an input analog-to-digital converter configured to receive an input signal and produce a digital signal from the input signal; and a DC-offset estimation device coupled with the input analog-to-digital converter. The DC-offset estimation device is configured to produce a quantized DC-offset estimate from the digital signal. And the input analog-to-digital converter is configured to receive the quantized DC-offset estimate and to adjust a DC offset of the digital signal.
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Citations
20 Claims
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1. A communication system capable of conducting DC-offset mitigation, the system comprising:
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an input analog-to-digital converter configured to receive an input signal and produce a digital signal from the input signal; and
a DC-offset estimation device coupled with the input analog-to-digital converter, the DC-offset estimation device being configured to produce a quantized DC-offset estimate from the digital signal, wherein the input analog-to-digital converter is configured to receive the quantized DC-offset estimate and to adjust a DC offset of the digital signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A WLAN direct conversion device capable of conducting DC-offset mitigation, the device comprising:
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a base-band receiver;
a local oscillator;
a first signal-processing branch being coupled to an input, to the local oscillator, and to the base-band receiver;
a second signal-processing branch being coupled to the input, to the local oscillator through a 90-degree phase shifter, and to the base-band receiver;
a first DC-offset estimation circuit coupled to the first branch and the base-band receiver; and
a second DC-offset estimation circuit coupled to the first branch and the base-band receiver. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A DC-offset mitigation method for a communication system, the method comprising:
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receiving an input signal;
estimating a DC offset of the analog input signal;
quantizing the estimated DC offset to produce a quantized DC-offset estimate; and
producing from the input signal an adjusted digital signal, the adjusted digital signal having been adjusted with a DC-offset level approximating the quantized DC-offset estimate. - View Dependent Claims (17, 18, 19, 20)
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Specification