Title:
COMMUNICATION DEVICE, COMMUNICATION METHOD, AND CANCEL DEVICE
Document Type and Number:
Japanese Patent JP2018142820
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve quality of a reception signal.SOLUTION: A cancel device 20 comprises a frequency error estimation unit 21, a generation unit 22, and a synthesis unit 23. The frequency error estimation unit 21 estimates a frequency error of a first transmission signal which has been up-converted into a first frequency, and also estimates a frequency error of a second transmission signal which has been up-converted into a second frequency. With the use of the first transmission signal and the second transmission signal, the generation unit 22 generates a cancel signal which is a replica of an intermodulation signal. The cancel signal has been subjected to frequency correction on the basis of the frequency errors estimated by the frequency error estimation unit 21. The synthesis unit 23 synthesizes a cancel signal and a reception signal which has been down-converted by a reception unit.SELECTED DRAWING: Figure 3
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Inventors:
ISHIKAWA HIROYOSHI
OKI YUSUKE
OKI YUSUKE
Application Number:
JP2017035288A
Publication Date:
September 13, 2018
Filing Date:
February 27, 2017
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H04B1/10
Attorney, Agent or Firm:
Sakai International Patent Office