公开(公告)号：US11799557B2

公开(公告)日：2023-10-24

申请号：US17637691

申请日：2019-08-26

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takeshi Kakizaki ,  Fukutaro Hamaoka ,  Masanori Nakamura ,  Takeo Sasai

IPC: H04B10/54 ,  H04L27/26

CPC classification number: H04B10/541 ,  H04L27/2605 ,  H04L27/2613

Abstract: A communication device includes an amplitude conversion unit configured to generate a symbol sequence according to a bit sequence, a distribution matching unit configured to add redundant bits to the symbol sequence through probabilistic amplitude shaping (PAS) coding, an insertion unit configured to insert a pilot symbol into the symbol sequence to which the redundant bits have been added and transmit the symbol sequence into which the pilot symbol has been inserted to a transmission path, and a control unit configured to acquire information on the transmission path and change, according to the information on the transmission path, allocation of the redundancy of the PAS coding and the redundancy of the pilot symbol in a range of redundancy that is able to be allocated depending on a predetermined throughput.

公开(公告)号：US12057863B2

公开(公告)日：2024-08-06

申请号：US17802071

申请日：2020-02-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masanori Nakamura ,  Takeshi Kakizaki ,  Shigeki Miyake

IPC: H03M7/30 ,  H03M7/14 ,  H03M13/00 ,  H03M13/05 ,  H04B10/516 ,  H04L1/00 ,  H04L27/34

CPC classification number: H03M7/60 ,  H03M13/05 ,  H03M13/63 ,  H04B10/516 ,  H04L1/0042 ,  H04L1/0045 ,  H04L1/0057 ,  H04L27/34 ,  H03M7/14

Abstract: An aspect of the present invention is a communication system including: an encoding unit configured to transform an input symbol sequence into an output symbol sequence, the input symbol sequence being a sequence of first symbols, the output symbol sequence being a sequence of second symbols; and a decoding unit configured to transform the output symbol sequence into the input symbol sequence in accordance with a decoding-side transformation mapping for transforming the output symbol sequence into the input symbol sequence that is a transformation source for the output symbol sequence, wherein the encoding unit transforms the input symbol sequence into the output symbol sequence in accordance with encoding-side transformation destination candidate information, the input symbol sequence, and a transformation probability, the encoding-side transformation destination candidate information being information indicating candidates of a transformation destination for the input symbol sequence, the transformation probability being a probability of transformation into the transformation destination indicated by the encoding-side transformation destination candidate information, and a probability of appearance of the second symbol conforms to a predefined prescribed probability distribution.

公开(公告)号：US20220294535A1

公开(公告)日：2022-09-15

申请号：US17637691

申请日：2019-08-26

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Takeshi Kakizaki ,  Fukutaro Hamaoka ,  Masanori NAKAMURA ,  Takeo Sasai

IPC: H04B10/54 ,  H04L27/26

Abstract: A communication device includes an amplitude conversion unit configured to generate a symbol sequence according to a bit sequence, a distribution matching unit configured to add redundant bits to the symbol sequence through probabilistic amplitude shaping (PAS) coding, an insertion unit configured to insert a pilot symbol into the symbol sequence to which the redundant bits have been added and transmit the symbol sequence into which the pilot symbol has been inserted to a transmission path, and a control unit configured to acquire information on the transmission path and change, according to the information on the transmission path, allocation of the redundancy of the PAS coding and the redundancy of the pilot symbol in a range of redundancy that is able to be allocated depending on a predetermined throughput.