Transceiver

Abstract

The invention discloses a transceiver applied to a time division duplexing TDD system. The transceiver comprises a digital up-conversion unit, a digital predistortion processing unit, a downlink analogue unit, a radio-frequency transceiver unit, an uplink radio-frequency pretreatment unit, a switch, a feedback and uplink share unit and a digital down-conversion unit, wherein the switch conducts electrical passages among the feedback and uplink share unit, the uplink radio-frequency pretreatment unit and the digital down-conversion unit when the transceiver is in a receiving time slot; and the switch conducts electrical passages among the feedback and uplink share unit, the downlink analogue unit and the digital predistortion processing unit when the transceiver is in a transmitting time slot. By applying the invention, a feedback link and an uplink can perform the time division multiplexing on the feedback and uplink share unit, thereby reducing the complexity of the design of the transceiver, reducing the volume of the transceiver and also lowering the cost of the transceiver.

Description

[0001] technical field [0002] The invention relates to wireless transceiver technology, in particular to a transceiver. Background technique [0003] In the transceiver of the current communication system, the baseband (Base Band) signal forms a modulated signal after a series of processing, and then transmits after being amplified by a radio frequency power amplifier (PA, Power Amplifier). Non-linear distortion characteristics will cause it to amplify the input signal while generating new frequency (harmonic) components, which will interfere with the transmitted signal or other channel signals. [0004] In order to improve the nonlinear distortion of the PA and ensure the linearity of the PA output signal, the following two solutions have been proposed in the prior art: one is to use the power back-off method to make the PA work far below its 1 decibel (dB) compression In order to improve the nonlinear distortion characteristics of the PA, this method of power backoff will...

AI Technical Summary

Problems solved by technology

Therefore, for a communication system using Time Division Duplex (TDD, Time Division Duplex) technology, since the uplink and downlink use the same frequency point (radio frequency signal of the same frequency point) and time-division work, the The radio frequency signal is transmitted and received through slots, so that the structures and functions of some components in the uplink unit are exactly the same as those of the corresponding components in the feedback unit. For example, due to the uplink and downlink The frequency points of the RF signals are the same, therefore, the structure and function of the second analog RF down-converter in the uplink unit and the first analog RF down-converter in the feedback unit are exactly the same, while the existing transceiver Among them, the uplink and the feedback link use independent components, which makes the design of the transceiver complex, large in size, and high in cost; moreover, more components also reduce the reliability of the transceiver

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