Pre-compensation of the phase shifting error

Patent metadata

Field	Value
Publication number	US-2016269090-A1
Application number	US-201415034020-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	Nov 4, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

In this disclosure, methods for pre-compensation of the phase shifting error, and apparatuses for the same are disclosed. In one example, a device performs precoding of a digital signal, while acquiring information on an error caused by a phase shifting of the precoding. Then, the device performs phase compensation on the digital signal based on the acquired information. This phase compensated-digital signal is converted to an analogue signal, and is transmitted to a receiver.

First claim

1 . A method for transmitting signals in a mobile communication system using multiple antennas, the method comprising:
precoding a digital signal; acquiring information on an error caused by a phase shifting of the precoding; performing a phase compensation on the digital signal based on the acquired information; converting the phase compensated-digital signal to an analogue signal; and transmitting the analogue signal to a receiver.

2 . The method of claim 1 , wherein the information on the error caused by the phase shifting comprises amount of error per subcarrier set.

3 . The method of claim 1 , wherein the phase compensation compensates different amount of phase for each subcarrier set.

4 . The method of claim 1 , wherein the information is acquired based on feedback information from the receiver.

5 . The method of claim 1 , wherein converting the phase compensated-digital signal to the analogue signal comprises:
performing an IFFT to the phase compensated-digital signal.

6 . A device operating in a wireless communication system, the device comprising:
a transceiver for transmitting and receiving signals to and from another device; and a processor connected to the transceiver and configured to a digital signal to be transmitted, wherein the processor acquires information on an error caused by a phase shifting of the precoding, performs a phase compensation on the digital signal based on the acquired information, converts the phase compensated-digital signal to an analogue signal, and controls the transceiver to transmit the analogue signal to the another device.

7 . The device of claim 6 , wherein the information on the error caused by the phase shifting comprises amount of error per subcarrier set.

8 . The device of claim 6 , wherein the processor compensates different amount of phase for each subcarrier set as the phase compensation.

9 . The device of claim 6 , wherein the processor acquires the information based on feedback information from the another device.

10 . The device of claim 6 , wherein the processor performs an IFFT to the phase compensated-digital signal for converting the phase compensated-digital signal to the analogue signal.

Assignees

• Lg Electronics Inc

Inventors

• Kim Kitae
• Chung Jaehoon
• Kang Jiwon
• Noh Kwangseok
• Choi Kukheon
• Ko Hyunsoo
• Kim Jinmin

Classifications

• H04L25/0224

  using sounding signals · CPC title

• H04B17/11

  for calibration · CPC title

• H04B7/0656 Primary

  at the transmitter, e.g. error detection at base station · CPC title

• H04B7/0619

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title

• H04B7/046

  taking physical layer constraints into account · CPC title