Power amplification apparatus for massive MIMO base stations
First Claim
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1. A Multi-Input Multi-Output system, comprising:
- a plurality of transmitter blocks, each including circuitry configured togenerate an output signal,low pass filter the output signal to generate a filtered output signal,receive a plurality of reference voltages each based on an average value of the filtered output signal and filtered output signals from each of the other transmitter blocks in the plurality of transmitter blocks,compare the filtered output signal with the plurality of reference voltages to produce a result of comparison,generate a plurality of multiplier signals,select one of the plurality of multiplier signals based on the result of comparison, andadjust the output signal by multiplying the output signal by the selected one of the plurality of multiplier signals.
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Abstract
A Multi-Input Multi-Output base station includes a plurality of transmitter blocks. Each block includes a time-domain base band signal source circuit that generates an output, a low pass filter circuit coupled to the base band source circuit that filters the output of the base band source circuit, and a signal level adjuster circuit coupled to the base band signal source circuit and the low pass filter and that adjusts the output of the base band signal source circuit based on an output of the low pass filter.
9 Citations
13 Claims
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1. A Multi-Input Multi-Output system, comprising:
a plurality of transmitter blocks, each including circuitry configured to generate an output signal, low pass filter the output signal to generate a filtered output signal, receive a plurality of reference voltages each based on an average value of the filtered output signal and filtered output signals from each of the other transmitter blocks in the plurality of transmitter blocks, compare the filtered output signal with the plurality of reference voltages to produce a result of comparison, generate a plurality of multiplier signals, select one of the plurality of multiplier signals based on the result of comparison, and adjust the output signal by multiplying the output signal by the selected one of the plurality of multiplier signals. - View Dependent Claims (2)
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3. A method for each of a plurality of transmitter blocks in a Multi-Input Multi-Output base station, comprising:
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generating, with circuitry, an output signal; low pass filtering, with the circuitry, the output signal to generate a filtered output signal; receiving, with the circuitry, a plurality of reference voltages each based on an average value of the filtered output signal and filtered output signals from each of the other transmitter blocks in the plurality of transmitter blocks; comparing, with the circuitry, the filtered output signal with the plurality of reference voltages to produce a result of comparison; generating, using the circuitry, a plurality of multiplier signals, selecting, using the circuitry, one of the plurality of multiplier signals based on the result of comparison, and adjusting, using the circuitry, the output signal by multiplying the output signal by the selected one of the plurality of multiplier signals. - View Dependent Claims (4)
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5. A Multi-Input Multi-Output base station comprising:
a plurality of transmitter blocks, each including circuitry configured to generate an output signal, low pass filter the output signal to generate a filtered output signal, receive a plurality of reference voltages each based on an average value of the filtered output signal and filtered output signals from each of the other transmitter blocks in the plurality of transmitter blocks, compare the filtered output signal with the plurality of reference values to produce a result of comparison, generate a plurality of multiplier signals, select one of the plurality of multiplier signals based on the result of comparison, and adjust the output signal by multiplying the output signal by the selected one of the plurality of multiplier signals. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
Specification