Method and device for synchronizing input/output signals by radio frequency unit in wireless communication system

Patent metadata

Field	Value
Publication number	US-10454666-B2
Application number	US-201615546495-A
Country	US
Kind code	B2
Filing date	Feb 2, 2016
Priority date	Feb 2, 2015
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The present invention relates to an input/output signal synchronization method by a radio frequency unit. The input/output signal synchronization method according to the present invention comprises the steps of: generating a transmitter (Tx) input signal by adding, to a baseband signal, a test signal located at a frequency out of an operation frequency range of the radio frequency unit; collecting the Tx input signal and a Tx output signal obtained by outputting the input signal through a Tx function block; and synchronizing the Tx input signal and the Tx output signals, based on a result obtained by the collecting.

First claim

The invention claimed is:

1. A method for synchronizing signals of a radio frequency unit, comprising:
generating a transmitter (Tx) input signal by adding, to a baseband signal, a test signal corresponding to a frequency out of an operating frequency range of the radio frequency unit, an autocorrelation value of the test signal being higher than a predetermined value;
collecting the Tx input signal and a Tx output signal obtained by processing the Tx input signal through a Tx function block;
synchronizing the Tx input signal and the Tx output signal, based on a cross correlation value between the collected Tx input signal and the Tx output signal; and
removing the test signal outside of the operating frequency range by a filter.

2. The method of claim 1 , wherein the test signal is a pre-stored signal.

3. The method of claim 1 , wherein the Tx function block includes at least one of a mixer, a digital to analog converter (DAC), and a power amplifier.

4. The method of claim 1 , wherein the test signal includes white Gaussian noise in a specific frequency range.

5. A radio frequency unit, comprising:
a controller configured to:
generate a transmitter (Tx) input signal by adding, to a baseband signal, a test signal corresponding to a frequency out of an operating frequency range of the radio frequency unit, an autocorrelation value of the test signal being higher than a predetermined value,
collect the Tx input signal and a Tx output signal obtained by processing the Tx input signal through a Tx function block,
synchronize the Tx input signal and the Tx output signal based on a cross correlation value between the collected Tx input signal and the Tx output signal, and
remove the test signal outside of the operating frequency range by a filter; and

a memory configured to store the test signal.

6. The radio frequency unit of claim 5 , wherein the Tx function block includes at least one of a mixer, a digital to analog converter (DAC), and a power amplifier.

7. The radio frequency unit of claim 5 , wherein the test signal includes white Gaussian noise in a specific frequency range.

Assignees

• Samsung Electronics Co Ltd
• Samsunng Electronics Co Ltd

Inventors

• Min Taeyoung
• Woo Youngyoon
• Im Jaehyung
• Martynovich Pavel

Classifications

• H04L7/0029

  interpolation of received data signal · CPC title

• H04L7/0008

  Synchronisation information channels, e.g. clock distribution lines · CPC title

• H04L7/0016

  correction of synchronization errors · CPC title

• H04B17/19 Primary

  Self-testing arrangements · CPC title

• H04B17/104

  of other parameters, e.g. DC offset, delay or propagation times · CPC title