Radio frequency transceiver chip, and synchronization system and method for radio frequency transceiver chip

Abstract

The invention relates to a radio frequency transceiver chip and a synchronization system and method for the radio frequency transceiver chip. The radio frequency transceiver chip comprises a mixer, ananalog-to-digital converter, a receiving local oscillator, a transmitting local oscillator, a digital-to-analog converter and a digital unit. A receiving link is a zero intermediate frequency architecture and is composed of the mixer and the analog-to-digital converter, and the receiving local oscillator is a fractional frequency synthesizer; a transmitting link is a radio frequency direct acquisition architecture and is composed of the digital-to-analog converter, and the transmitting local oscillator is an integer frequency synthesizer; and inputs of the decimal frequency synthesizer and the integer frequency synthesizer are a reference clock and a synchronization signal. During multi-chip synchronization, integer frequency synthesizer synchronization of the transmitting link is firstlycarried out, and then fractional frequency synthesizer synchronization of the receiving link is carried out. The fractional frequency synthesis synchronization comprises synchronization of a fractional frequency division module and synchronization of a multimode frequency division module. The system and the method are suitable for a large-scale phased array, do not need an external high-frequencylocal oscillator signal, and effectively reduce the power consumption of a multi-chip synchronous clock network.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a radio frequency transceiver chip, and a synchronization system and method for the radio frequency transceiver chip. Background technique [0002] The role of the radio frequency transceiver chip is to pass the radio frequency signal to the baseband for subsequent signal processing after amplification, filtering and analog-to-digital conversion, which determines the communication quality of radio frequency communication. The receiving chain of the RF transceiver chip usually includes a low-noise amplifier, a down-mixer, a filter, and an analog-to-digital converter; the transmitting chain usually includes multiple units such as a digital-to-analog converter, a filter, and an up-mixer. [0003] In recent years, with the development of phased array communication requirements such as 5G mobile communication, RF transceiver chips are required to have the ability to work s...

AI Technical Summary

Problems solved by technology

[0004] The main disadvantages of the traditional phased array architecture are the large scale of the local oscillator network, high power consumption, and low precision. Especially for some high-frequency applications, due to the bandwidth limitation of the transmission medium (such as copper cable), the phase of the local oscillator network will very difficult to align

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