ACTIVE ANTENNA, BASE STATION, METHOD FOR REFRESHING AMPLITUDES AND PHASES, AND METHOD FOR PROCESSING SIGNALS
First Claim
1. An active antenna, comprising an antenna dipole array, a transceiver array, a digital processing unit (DPU), and a transceiving calibration unit, wherein:
- the antenna dipole array comprises an antenna dipole adapted to perform conversion between an electromagnetic wave signal and a radio frequency (RF) signal;
the transceiver array comprises a transceiver adapted to;
during signal reception, demodulate the RF signal of the antenna dipole into an IQ analog signal through down-conversion, and output the IQ analog signal to the DPU;
during signal transmission, modulate the IQ analog signal of the DPU into an RF signal through up-conversion, and output the RF signal to the antenna dipole; and
the DPU is adapted to;
during signal reception, convert the down-converted IQ analog signal into an IQ digital signal, and perform digital beam forming (DBF) on the IQ digital signal according to the transceiving calibration unit;
during signal transmission, convert a signal of a base band unit (BBU) into an IQ digital signal through serial/parallel (S/P) conversion, perform crest factor reduction (CFR) on the converted IQ digital signal, and perform DBF on the IQ digital signal that undergoes the CFR processing according to the transceiving calibration unit.
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Accused Products
Abstract
An active antenna, a base station, a method for refreshing the amplitude and phase, and a signal processing method are disclosed to simplify the structure of a phase shifter and guarantee the reliability of the phase shifter. The active antenna or the base station includes an antenna dipole array, a transceiver array, a digital processing unit (DPU), and a transceiving calibration unit. During signal reception, the transceiver demodulates a radio frequency (RF) signal of the antenna dipole into an IQ analog signal, and outputs the IQ analog signal to the DPU; the DPU converts the demodulated IQ analog signal into an IQ digital signal, and performs digital beam forming (DBF) on the IQ digital signal according to the transceiving calibration unit; during signal transmission, the transceiver modulates the IQ analog signal of the DPU into an RF signal, and outputs the RF signal to the antenna dipole; the DPU converts a signal of a base band unit (BBU) into an IQ digital signal in serial/parallel (S/P) mode, and performs DBF on the IQ digital signal according to the transceiving calibration unit.
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Citations
17 Claims
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1. An active antenna, comprising an antenna dipole array, a transceiver array, a digital processing unit (DPU), and a transceiving calibration unit, wherein:
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the antenna dipole array comprises an antenna dipole adapted to perform conversion between an electromagnetic wave signal and a radio frequency (RF) signal; the transceiver array comprises a transceiver adapted to;
during signal reception, demodulate the RF signal of the antenna dipole into an IQ analog signal through down-conversion, and output the IQ analog signal to the DPU;
during signal transmission, modulate the IQ analog signal of the DPU into an RF signal through up-conversion, and output the RF signal to the antenna dipole; andthe DPU is adapted to;
during signal reception, convert the down-converted IQ analog signal into an IQ digital signal, and perform digital beam forming (DBF) on the IQ digital signal according to the transceiving calibration unit;
during signal transmission, convert a signal of a base band unit (BBU) into an IQ digital signal through serial/parallel (S/P) conversion, perform crest factor reduction (CFR) on the converted IQ digital signal, and perform DBF on the IQ digital signal that undergoes the CFR processing according to the transceiving calibration unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for refreshing an amplitude and a phase of a receiving channel, comprising:
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selecting a receiving channel; converting a receiving calibration IQ digital signal into an IQ analog signal that enters a receiving calibration channel, and modulating the IQ analog signal into a receiving calibration radio frequency (RF) signal through up-conversion; coupling the receiving calibration RF signal into the selected receiving channel, and demodulating the receiving calibration RF signal into an IQ analog signal through down-conversion;
converting the IQ analog signal into an IQ digital signal, comparing the IQ digital signal with the receiving calibration IQ digital signal, and obtaining an amplitude and a phase of the selected receiving channel; andrefreshing the amplitude and phase of the selected receiving channel according to the amplitude and phase. - View Dependent Claims (11)
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12. A method for refreshing an amplitude and a phase of a transmission channel, comprising:
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selecting a transmission channel; collecting an IQ digital signal; converting the IQ digital signal into an IQ analog signal that enters the selected transmission channel, and modulating the IQ analog signal into a radio frequency (RF) signal; coupling the RF signal into a transmission calibration channel, and demodulating the RF signal into an IQ analog signal through down-conversion; converting the IQ analog signal into an IQ digital signal, comparing the collected IQ digital signal with the converted IQ digital signal, and obtaining an amplitude and a phase of the selected transmission channel; and refreshing the amplitude and phase of the selected transmission channel according to the amplitude and phase of the selected transmission channel. - View Dependent Claims (13)
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14. A mode-based or carrier-based processing method for receiving signals, comprising:
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converting IQ analog signals of M receiving channels into M IQ digital signals, and splitting each IQ digital signal into N single-mode receiving signals or N single-carrier receiving signals through N mode-based or carrier-based numerical control oscillators (NCOs); performing digital beam forming (DBF) on each N single-mode receiving signals or each N single-carrier receiving signals in the M receiving channels; combining single-mode receiving signals in the M receiving channels in each N single-mode receive signals or single-carrier receiving signals in the M receiving channels in each N single-carrier receiving signals through a combiner, processing the combined signal through a filter processing module, and obtaining N IQ digital signals; and combining the N IQ digital signals into a signal through the combiner, and transmitting the signal to a base band unit (BBU). - View Dependent Claims (15)
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16. A mode-based or carrier-based processing method for transmitting signals, comprising:
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converting a transmission signal through serial/parallel (S/P) conversion, and obtaining N IQ digital signals, processing each IQ digital signal of the N IQ digital signals through a mode-based or carrier-based numerical control oscillator (NCO), and obtaining each single-mode transmission IQ digital signal or each single-carrier transmission IQ digital signal; processing each single-mode transmission IQ digital signal of the N IQ digital signals or each single-carrier transmission IQ digital signal of the N IQ digital signals through M digital beam forming modules (DBFs), and obtaining M mode-based or carrier-based IQ digital signals; combining N single-mode transmission IQ digital signals in each M transmission channels or N single-carrier transmission IQ digital signals in each M transmission channels into a signal through a combiner, and obtaining M mode-based or carrier-based mixture transmission signals; and performing crest factor reduction (CFR) and digital pre-distortion (DPD) on the M mode-based or carrier-based mixture transmission signals, converting the M mode-based or carrier-based mixture transmission signals into IQ analog signals, and outputting the IQ analog signals to each transmission channel of a transceiver. - View Dependent Claims (17)
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Specification