Title:
INTERFERENCE WAVE DETERMINATION DEVICE, INTERFERENCE WAVE DETERMINATION METHOD, INTERFERENCE WAVE DETERMINATION PROGRAM, AND RECEIVER
Document Type and Number:
Japanese Patent JP2022153920
Kind Code:
A
Abstract:
To provide an interference wave determination device, an interference wave determination method, an interference wave determination program, and a receiver that can determine interference waves with high accuracy.SOLUTION: An interference wave determination device 30 according to an embodiment includes an error correction decoding unit 22 that is provided in a receiver 20 that receives a transmission symbol sequence error-correction-encoded using a convolutional code from a transmitter 10, and sequentially calculates the difference in likelihood between the maximum likelihood sequence and a sequence other than the maximum likelihood sequence at each symbol position included in each reception symbol sequence that has been error-correction-decoded multiple times by reception multiple times, a reliability determination unit 31 that determines the received symbol sequence to a low-reliability symbol sequence when the calculated difference is less than a first threshold, sets the symbol position that is first determined to be the low-reliability symbol sequence as a low-reliability symbol position, and determines whether the number of low-reliability sequences is greater than or equal to a second threshold, and an interference wave determination unit 32 that determines that an interference wave exists when the variance of the low-reliability symbol positions in the low-reliability symbol sequence is less than a third threshold.SELECTED DRAWING: Figure 10
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Inventors:
ITO SHOTARO
Application Number:
JP2021056696A
Publication Date:
October 13, 2022
Filing Date:
March 30, 2021
Export Citation:
Assignee:
NEC CORP
International Classes:
H04L1/20; H03M13/23; H03M13/39; H04L1/00
Attorney, Agent or Firm:
Ken Ieiri