Transmitter receiver leakage reduction in a full duplex system without the use of a duplexer

A technology of receivers and transmitters, applied in the field of computer programs, which can solve problems such as lost transmission energy

Active Publication Date: 2015-12-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, here it can be seen that half of the emitted energy is lost in thermal dissipation in the dummy load

Method used

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  • Transmitter receiver leakage reduction in a full duplex system without the use of a duplexer
  • Transmitter receiver leakage reduction in a full duplex system without the use of a duplexer
  • Transmitter receiver leakage reduction in a full duplex system without the use of a duplexer

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Embodiment Construction

[0060] figure 2 is a block diagram schematically showing a transceiver 200 according to an embodiment. The transceiver 200 includes a transmitter 202, a receiver 204, and signal transmission means 206 (such as an antenna means or a wired connection as shown). Transmitter 202 includes a power amplifier (PA) 208 and may also include other transmitter circuitry 210, however, other transmitter circuitry is not further described in this disclosure because it does not affect the inventive contribution to this field. The antenna arrangement 206 is arranged to transmit radio frequency signals provided from the transmitter 202 via its power amplifier 208 , and the antenna arrangement 206 is also arranged to receive and provide radio frequency signals to the receiver 204 . The transceiver 200 also includes an auxiliary power amplifier 212 with controllable phase shift and gain. The function of auxiliary PA212 will be explained below. The transceiver 200 also includes a first impedan...

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PUM

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Abstract

A transceiver suitable for frequency duplex division communication is disclosed. The transceiver comprises a transmitter, wherein the transmitter comprises a power amplifier; a receiver; an auxiliary power amplifier which is arranged to provide a controllable phase shift and gain output; a first filter arranged at an output of the power amplifier arranged to attenuate frequencies at a receiving frequency of the receiver; a second filter arrangement at an output of the auxiliary power amplifier arranged to attenuate frequencies at a receiving frequency of the receiver; and a signal transmission arrangement. The signal transmission arrangement is arranged to transmit signals provided from the transmitter through its power amplifier to a radio frequency, RF, connecting point, receive signals from the RF connecting point and provide the signals to the receiver, and provide signals from the auxiliary amplifier towards an input of the receiver. The transceiver also comprises a controller, wherein the controller is arranged to control the auxiliary power amplifier output to provide a signal that has a phase and amplitude in relation to the output of the power amplifier of the transmitter such that the transmitter contribution to the signal at the input of the receiver is suppressed. A method of controlling the transceiver, a communication device and computer program are also disclosed.

Description

technical field [0001] The present invention generally relates to a transceiver, a method of operating a transceiver, and a computer program for implementing the method. The invention also relates to a communication device capable of frequency division duplex communication, comprising such a transceiver. Background technique [0002] Transceivers include transmitters and receivers, and are commonly used in various communication devices. Transceivers may be arranged to operate in half-duplex, ie the receiver and transmitter operate on the same frequency but separated in time, to prevent the transmitter signal from hiding the received signal. This method is therefore generally referred to as Time Division Duplexing (TDD). Transceivers are also capable of full-duplex operation, that is, receiver and transmitter operate simultaneously, where special provisions are provided to prevent the transmitter from hiding the received signal. One way to achieve the above is to assign di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/525
CPCH04B1/525H04B1/123H04B1/44H04L5/14
Inventor 斯蒂芬·安德森伊马德丁丹尼尔·艾克伯克亨利克·斯约兰达约翰·韦内哈格
Owner TELEFON AB LM ERICSSON (PUBL)
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