Wireless Transceiver

Patent metadata

Field	Value
Publication number	US-2016156375-A1
Application number	US-201615014851-A
Country	US
Kind code	A1
Filing date	Feb 3, 2016
Priority date	Dec 23, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

Embodiments of the present disclosure disclose a wireless transceiver. The wireless transceiver includes a second control switch, and the second control switch may selectively connect a signal output end of a coupler or a signal output end of a low noise amplifier LNA to a signal input end of the down converter. Therefore, when the signal output end of the coupler is connected to the down converter, the coupler, the down converter, and the analog-to-digital converter ADC form an observer; when the second control switch connects the signal output end of the low noise amplifier LNA to the signal input end of the down converter, a transceiver antenna, the low noise amplifier LNA, the down converter, and the analog-to-digital converter ADC form a receiver. Therefore, the embodiments of the present disclosure can greatly save hardware costs of a system for implementing an observer circuit.

First claim

What is claimed is:

1 . A wireless transceiver, comprising:
a digital pre-distorter; a digital-to-analog converter; an up converter; a power amplifier; a first control switch; a transceiver antenna; a coupler; a low noise amplifier; a second control switch; a down converter; and an analog-to-digital converter; wherein the digital pre-distorter, the digital-to-analog converter, the up converter, the power amplifier, and the coupler are connected in sequence; wherein the first control switch selectively connects one of a signal output end of the power amplifier PA or a signal input end of the low noise amplifier to the transceiver antenna; wherein the second control switch selectively connects one of a signal output end of the coupler or a signal output end of the low noise amplifier to a signal input end of the down converter; and wherein a signal output end of the down converter is connected to a signal input end of the analog-to-digital converter.

2 . The wireless transceiver according to claim 1 , wherein the digital pre-distorter comprises an algorithm module; and
wherein the algorithm module is configured to obtain a coefficient of a pre-distortion model according to an input original signal and a signal that is output by a first signal output end of the analog-to-digital converter.

3 . The wireless transceiver according to claim 1 , wherein the wireless transceiver further comprises an algorithm module;
wherein a first input end of the algorithm module is connected to a first signal output end of the analog-to-digital converter; wherein a signal that is input to a second input end of the algorithm module is an original signal; wherein an output end of the algorithm module is connected to an input end of the digital pre-distorter; and wherein the algorithm module is configured to obtain a coefficient of a pre-distortion model according to the input original signal and a signal that is output by the analog-to-digital converter.

4 . The wireless transceiver according to claim 2 , wherein, when the first control switch connects the signal output end of the power amplifier to the transceiver antenna, and when the second control switch connects the signal output end of the coupler to the down converter, the digital pre-distorter, the digital-to-analog converter, the up converter, the power amplifier, and the transceiver antenna form a transmitter, and the coupler, the down converter, the analog-to-digital converter, and the algorithm module form an observer; and
wherein, when the first control switch connects the signal input end of the low noise amplifier to the transceiver antenna, and when the second control switch connects the signal output end of the low noise amplifier to the signal input end of the down converter, the transceiver antenna, the low noise amplifier, the down converter, and the analog-to-digital converter form a receiver; and wherein a second signal output end of the analog-to-digital converter is configured to output a received signal from the transceiver antenna.

5 . The wireless transceiver according to claim 1 , wherein the wireless transceiver further comprises an algorithm module, a pre-distortion mapping module, and an interpolation compensation module;
wherein a first input end of the algorithm module is connected to a signal output end of the interpolation compensation module; wherein a second input end of the algorithm module is connected to a signal output end of the digital pre-distorter; wherein an output end of the algorithm module is connected to an input end of the digital pre-distorter; and wherein the algorithm module is configured to obtain a coefficient of a pre-distortion model according to a signal that has been processed by the digital pre-distorter and a signal that is output by the interpolation compensation module.

6 . The wireless transceiver according to claim 5 , wherein the pre-distortion mapping module is configured to perform pre-distortion processing on a signal that is output by a first signal output end of the analog-to-digital converter, to compensate for distortion brought by the power amplifier; and
wherein the interpolation compensation module is configured to perform interpolation compensation on a signal that has been processed by the pre-distortion mapping module.

7 . The wireless transceiver according to claim 1 , wherein the first control switch selectively connects one of the signal output end of the power amplifier or the signal input end of the low noise amplifier to the antenna in a time division multiplexing manner; and
wherein the second control switch selectively connects one of the signal output end of the coupler or the signal output end of the low noise amplifier to the signal input end of the down converter in a time division multiplexing manner.

8 . The wireless transceiver according to claim 1 , wherein, when the first control switch is closed so that the signal output end of the power amplifier is connected to the transceiver antenna, the second control switch is closed so that the signal output end of the coupler is connected to the single input end of the down converter; and
wherein, when the first control switch is closed so that the signal input end of the low noise amplifier is connected to the transceiver antenna, the second control switch is closed so that the signal output end of the low noise amplifier is connected to the signal input end of the down converter.

9 . A mobile terminal, comprising:
a wireless transceiver, comprising:
a digital pre-distorter;
a digital-to-analog converter;
an up converter;
a power amplifier;
a first control switch;
a transceiver antenna;
a coupler;
a low noise amplifier;
a second control switch;
a down converter; and
an analog-to-digital converter,
wherein the digital pre-distorter, the digital-to-analog converter, the up converter, the power amplifier, and the coupler are connected in sequence; wherein the first control switch selectively connects a signal output end of the power amplifier PA or a signal input end of the low noise amplifier to the transceiver antenna; wherein the second control switch selectively connects a signal output end of the coupler or a signal output end of the low noise amplifier to a signal input end of the down converter; and wherein a signal output end of the down converter is connected to a signal input end of the analog-to-digital converter.

10 . The wireless transceiver according to claim 9 , wherein the digital pre-distorter comprises an algorithm module; and
wherein the algorithm module is configured to obtain a coefficient of a pre-distortion model according to an input original signal and a signal that is output by a first signal output end of the analog-to-digital converter.

11 . The wireless transceiver according to claim 9 , wherein the wireless transceiver further comprises an algorithm module;
wherein a first input end of the algorithm module is connected to a first signal output end of the analog-to-digital converter; wherein a signal that is input to a second input end of the algorithm module is an original signal; wherein an output end of the algorithm module is connected to an input end of the digital pre-distorter; and wherein the algorithm module is configured to obtain a coefficient of a pre-distortion model according to the input original signal and a signal that is output by the analog-to-digital converter.

12 . The wireless transceiver according to claim 9 , wherein the wireless transceiver further comprises an algorithm module, a pre-distortion mapping module, and an interpolation compensation module;
wherein

Assignees

• Huawei Tech Co Ltd

Inventors

• Yang Ganghua
• Bao Hongqiang

Classifications

• H04L27/368

  adaptive predistortion · CPC title

• H04B1/0475 Primary

  with means for limiting noise, interference or distortion (H04B1/0483 takes precedence) · CPC title

• H04B1/0007 Primary

  wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage · CPC title

• H03F1/3241

  using predistortion circuits (H03F1/3211, H03F1/3217 take precedence) · CPC title

• H04B2001/0425

  with linearisation using predistortion · CPC title