US 12,267,112 B2
Communication apparatus, communication system, communication method, and non-transitory computer readable medium
Tadashi Koga, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 18/020,193
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Jun. 2, 2021, PCT No. PCT/JP2021/021060
§ 371(c)(1), (2) Date Feb. 7, 2023,
PCT Pub. No. WO2022/038859, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 2020-138482 (JP), filed on Aug. 19, 2020.
Prior Publication US 2023/0291481 A1, Sep. 14, 2023
Int. Cl. H04B 10/54 (2013.01); H04J 14/08 (2006.01); H04L 27/34 (2006.01)
CPC H04B 10/541 (2013.01) [H04J 14/08 (2013.01); H04L 27/34 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A communication apparatus comprising:
at least one memory storing instructions; and
at least one processor configured to execute the instructions to:
transmit a plurality of types of quadrature amplitude-modulated signals;
add error correction codes to the quadrature amplitude-modulated signals; and
change the number of bits of the error correction code according to the type of the quadrature amplitude-modulated signal, and
change the number of bits of the error correction code in such a way that margins in regard to performance from the reception Q-value as transmission quality at an OSNR condition of each of the quadrature amplitude-modulated signals to a FEC correction limit are substantially equal to each other,
wherein the FEC correction limit is a maximum value of a bit error rate before FEC coding, and
wherein the maximum value satisfies the requirement that the Q value≥17 dB after the FEC coding.