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Quadrature phase detector circuit, quadrature phase corrector, multi-antenna radio circuit, radio station and method

A radio circuit, quadrature phase technology, applied in diversity/multi-antenna systems, electrical components, automatic power control, etc., can solve problems such as difficulties

Active Publication Date: 2021-01-12
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, given the mismatch between them, it is difficult

Method used

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  • Quadrature phase detector circuit, quadrature phase corrector, multi-antenna radio circuit, radio station and method
  • Quadrature phase detector circuit, quadrature phase corrector, multi-antenna radio circuit, radio station and method
  • Quadrature phase detector circuit, quadrature phase corrector, multi-antenna radio circuit, radio station and method

Examples

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Embodiment Construction

[0034] figure 1 Very schematically shown is a receiver, transmitter or transceiver 100 provided with a reference signal at a precisely defined frequency from a reference oscillator 102 to be able to transmit / receive signals at a desired frequency via a corresponding antenna 104 . Reference oscillator 102 typically provides a fixed frequency. In order to enable transmission / transmission at the desired frequency, the frequency is synthesized based on said reference signal. For this, a phase locked loop (PLL) can be used. For more complex tasks such as receiver / transmitter / transceiver eg as discussed in the Background section, such as beamforming, it is not only the frequency of the desired signal; it is also the corrected phase of that signal.

[0035] figure 2 PLL 200 is shown schematically. The PLL receives a reference signal from a reference oscillator 202 . PLL 200 includes a phase detector 204, a filter 206, a controlled oscillator 208 and a frequency divider. Phase ...

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Abstract

A quadrature phase detector circuit for a multi-antenna radio circuit including multiple frequency synthesizers using a common reference oscillator signal is disclosed. A quadrature phase detector comprising: a first state value arranged to collect a first quadrature signal indicative of a first frequency synthesizer of the plurality of frequency synthesizers to generate an internal state of a frequency divider circuit and a first state value indicative of the plurality of frequencies a second quadrature signal of a synthesizer a second quadrature signal of the synthesizer generates a first circuit of a second state value of an internal state of the frequency divider circuit, arranged to determine the first frequency synthesis from the first state value and the second state value a second circuit arranged to provide an indication of whether the quadrature signal of the first frequency synthesizer and the quadrature signal of the second frequency synthesizer are in-phase or out-of-phase; The output signal of the third circuit is either in-phase or out-of-phase.

Description

technical field [0001] The present invention generally relates to quadrature phase detector circuits, and quadrature phase correctors for multi-antenna radio circuits including multiple frequency synthesizers using a common reference oscillator signal, multiple antennas with such quadrature phase detector circuits Antenna radio circuit and radio station, and method for multi-antenna radio arrangement. Background technique [0002] As radio circuits become more complex and are also designed to operate at even higher frequencies, the components tend to draw more power. A frequency divider is an important element of a radio circuit, and is used, for example, to synthesize a signal of a desired frequency and phase. For example, multi-band radio circuits rely on the ability to generate signals at different controllable frequencies. Another example is the application of beamforming, where multiple antennas are fed by a signal with a phase controlled such that the arrangement of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/085H03L7/18H03L7/22
CPCH03L7/085H03L7/18H03L7/22H04B1/04H04B7/08H04B2001/0491
Inventor S.埃克S.马特蒂斯森T.佩尔斯森H.斯乔兰德
Owner TELEFON AB LM ERICSSON (PUBL)