Method and device for expanding dynamic range of reception channel in time division duplexing system

Abstract

The device includes at least transmitter receive (T-R) switch, front end sending channel in radio frequency, front end linear low noise amplifier in radio frequency, indication circuit of receiving frequency conversion and receiving field intensity of signal, and baseband control circuit. The method includes steps: baseband control circuit sends the control signal to control T-R switch in radio frequency to set T-R switch in state of receiving channel; linear low noise amplifier magnifies signal from T-R switch, and its output signal is inputted to the said indication circuit; the indication circuit magnifies converted frequency, and outputs intermediate frequency signal, and outputs indication signal; modulating signal, baseband control circuit controls T-R switch by using field intensity indication signal of received signal. If input signal is in radio frequency, baseband control circuit switches channel to sending channel.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for receiving a large dynamic range in a base station system based on a TDD (Time-divisionduplex) working mode. Background technique [0002] A high-performance receiver system has become an indispensable and important component in mobile communication systems of various communication systems. With the continuous development of modern mobile communication technology, the transmission distance of the communication system is getting farther and farther. In order to receive the transmission signal of the mobile station normally when the communication distance is long, and to prevent the mobile station and other interference signals from being disturbed by the mobile station when the communication distance is short The blocking of the receiver puts forward higher and higher requirements on the dynamic and other indicators of the receiving system. [0003] At p...

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a device for expanding the dynamic range of the receiving channel in a time-division duplex system, which partially overcomes the requirement for the dynamic range of the receiving subsystem in the existing TDD communication system, in order to improve the dynamic range of the transceiver circuit However, the use of more complex ALC control circuits or the use of high-cost high-linear devices causes the problem of rising system costs, and solves the difficulties in system design caused by the above problems

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