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Title:
OPTICAL SPACE COMMUNICATION RECEIVING DEVICE AND METHOD OF CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2017/169927
Kind Code:
A1
Abstract:
The objective of the present invention is to reduce the size of a receiving device circuit in an optical space communication system while maintaining communication stability. A data receiving device which decodes one item of data from a plurality of input signals includes: two or more digital signal processing means for subjecting the plurality of input signals to signal processing; a first recording means for temporarily recording the plurality of input signals; a SN ratio estimating means for estimating S/N ratios of each of the plurality of input signals and determining the number of the plurality of input signals to be combined, and the signals to be combined; and a scheduling means for carrying out overall control on the basis of the results from the SN ratio estimating means. The scheduling means performs control such that: if the number of input signals recorded in the first recording means is greater than or equal to the number of digital signal processing means, the digital signal processing means are caused to carry out processing in order of the time at which the input signals were recorded in the first recording means, and the signals that the SN ratio estimating means has determined are to be combined, from among the input signals at the time, are recorded in the first recording means; if the number of input signals recorded in the first recording means is less than the number of digital signal processing means, the digital signal processing means are caused to process the signals recorded in the first recording means and the input signals; and if the number of input signals processed by the digital signal processing means is less than the number to be combined, as determined by the SN ratio estimating means, only the signals that are not to be processed by the digital signal processing means, from among the signals determined by the SN ratio estimating means, are recorded in the first recording means.

Inventors:
HOSOKAWA KOHEI (JP)
ITO TOSHIHARU (JP)
TAKAHASHI SEIGO (JP)
ARIKAWA MANABU (JP)
ISHIKAWA TAKASHI (JP)
ONO YOSHIMASA (JP)
Application Number:
JP2017/011004
Publication Date:
October 05, 2017
Filing Date:
March 17, 2017
Export Citation:
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Assignee:
NEC CORP (?1088001, JP)
International Classes:
H04B10/60; H04B10/118
Domestic Patent References:
WO2016013188A12016-01-28
Foreign References:
US20140126902A12014-05-08
Attorney, Agent or Firm:
SHIMOSAKA Naoki (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
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