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

Abstract

The invention relates to a radio frequency transceiver chip, a synchronization system and method for the radio frequency transceiver chip, the radio frequency transceiver chip includes a mixer, an analog-to-digital converter, a receiving local oscillator unit, a transmitting local oscillator unit, a digital-to-analog converter and a digital unit , the receiving link is a zero-IF architecture, which is composed of a mixer and an analog-to-digital converter, and the receiving local oscillator unit is a fractional frequency synthesizer; the transmitting link is a radio frequency direct sampling architecture, which is composed of a digital-to-analog converter, and the transmitting local oscillator unit is Integer frequency synthesis; the input of fractional frequency synthesis and integer frequency synthesis is reference clock and synchronization signal. When multi-chip synchronization is performed, the integer frequency synthesis synchronization of the transmitting link is performed first, and then the fractional frequency synthesis synchronization of the receiving link is performed; the fractional frequency synthesis synchronization includes the synchronization of the fractional frequency division module and the synchronization of the multi-mode frequency division module. The invention is suitable for large-scale phased arrays, does not need to supply high-frequency local oscillator signals externally, and effectively reduces 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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