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Method of controlling performance of a radio base station arranged to communicate in tdd mode and radio base station

A radio base station, mode technology, applied in wireless communication, electrical components, transmission systems, etc., can solve problems such as transceiver disturbance

Active Publication Date: 2016-10-26
ERICSSON (CHINA) COMMUNICATION COMPANY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Such transceivers can experience disturbances, especially for signals received on the uplink

Method used

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  • Method of controlling performance of a radio base station arranged to communicate in tdd mode and radio base station
  • Method of controlling performance of a radio base station arranged to communicate in tdd mode and radio base station
  • Method of controlling performance of a radio base station arranged to communicate in tdd mode and radio base station

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Embodiment Construction

[0023] Briefly described, a solution is provided for reducing disturbances in uplink signals received at a receiver in a radio base station operating in TDD mode. The solution is based on the realization that at least some perturbations in the received uplink signal in the receiver section originate from the local oscillator (TX LO) of the transmitter section, due to leakage of the LO signal into the receiver section .

[0024] Starting from this realization, the natural way to solve such a problem would be to try to reduce the leakage originating from the conveyor part. This can be achieved by turning off the TX LO during the uplink receive interval. There will thus be no leakage during the uplink interval. However, the TX LO has a very narrow bandwidth for good phase noise. Therefore, it will take a long time for the TX LO to change from the unlocked state to the locked state, which means that it is impossible to turn off the TX LO during the uplink receive interval. Ins...

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Abstract

The invention relates to a method for controlling the performance of a radio base station communicating in time division duplex TDD mode in a cellular network. The radio base station has a transceiver (200) comprising a transmitter part (210), a receiver part (220) and an antenna (240) alternately connectable to the transmitter part (210) and receiver part (220), the The method includes: estimating (302) at the receiver section (220) a leakage signal in the receiver section, the leakage signal originating from a local oscillator (212) of the transmitter section (210); The estimated leakage signal is removed (304) from the received uplink signal. The invention also relates to a corresponding radio base station.

Description

technical field [0001] The present disclosure generally relates to methods for controlling the performance of a radio base station arranged to communicate in a time division duplex (TDD) mode. The present disclosure also relates to a radio base station arranged to communicate in TDD mode. Background technique [0002] Cellular technology specified by the 3rd Generation Partnership Project (3GPP) is the most widely deployed in the world. A new step researched and developed in 3GPP is the evolution of 3G to an evolved radio access technology called Long Term Evolution (LTE). In LTE, different modes of communication are available for radio nodes in a cellular network, such as frequency division duplex (FDD), time division duplex (TDD) and half duplex. [0003] In TDD, a single physical channel can be used for uplink and downlink transmissions. Uplink and downlink transmissions are independent in time, in communication between the radio base station and the mobile terminal. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/00
CPCH04B1/525H04B1/44H04W24/08
Inventor 郭志恒缪庆育苏又平
Owner ERICSSON (CHINA) COMMUNICATION COMPANY LTD