Wireless telecommunications multi-carrier receiver architecture
First Claim
1. A receiver for a wireless telecommunications system, said receiver comprising:
- an antenna responsive to received signals;
an input amplifier responsive to the received signals from the antenna, said input amplifier amplifying the received signals;
a frequency down-converter responsive to the amplified received signals from the input amplifier, said frequency down-converter down-converting the frequency of the amplified received signals to an intermediate frequency (IF) signal, said frequency down-converter passing the IF signal over a predetermined frequency band capable of including multiple received signals, said frequency down-converter simultaneously down-converting the multiple signals;
an analog-to-digital converter responsive to the IF signal from the frequency down-converter, said analog-to-digital converter converting the IF signal to a digital signal; and
a digital channelizer responsive to the digital signal from the analog-to-digital converter, said digital channelizer separating the digital signal into a plurality of separate received signals simultaneously down-converted by the frequency down-converter.
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Accused Products
Abstract
A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.
70 Citations
19 Claims
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1. A receiver for a wireless telecommunications system, said receiver comprising:
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an antenna responsive to received signals;
an input amplifier responsive to the received signals from the antenna, said input amplifier amplifying the received signals;
a frequency down-converter responsive to the amplified received signals from the input amplifier, said frequency down-converter down-converting the frequency of the amplified received signals to an intermediate frequency (IF) signal, said frequency down-converter passing the IF signal over a predetermined frequency band capable of including multiple received signals, said frequency down-converter simultaneously down-converting the multiple signals;
an analog-to-digital converter responsive to the IF signal from the frequency down-converter, said analog-to-digital converter converting the IF signal to a digital signal; and
a digital channelizer responsive to the digital signal from the analog-to-digital converter, said digital channelizer separating the digital signal into a plurality of separate received signals simultaneously down-converted by the frequency down-converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A receiver for a wireless telecommunications system, said receiver comprising:
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an antenna responsive to receive the signals;
a balanced low noise amplifier responsive to the received signals from the antenna, said low noise amplifier amplifying the received signals, said low noise amplifier including an amplifying device and a plurality of oscillation stabilization components monolithically integrated on a substrate;
a frequency down-converter responsive to the amplified received signals from the low noise amplifier, said frequency down-converter down-converting the frequency of the amplified received signals to an intermediate frequency (IF) signal, said frequency down-converter passing the IF signal over a particular frequency band capable of including multiple received signals, said frequency down-converter including a band pass filter that passes the IF signal over a frequency band greater than 1 MHz;
an analog-to-digital converter responsive to the IF signal from the frequency down-converter, said analog-to-digital converter converting the IF signal to a digital signal, said analog-to-digital converter being a delta-sigma converter employing a feedback loop; and
a digital channelizer responsive to the digital signal from the analog-to-digital converter, said digital channelizer separating the digital signal into a plurality of separate signals simultaneously down-converted by the frequency down-converter. - View Dependent Claims (16, 17, 18, 19)
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Specification