US 11,706,065 B2
Symbol judgement apparatus and symbol judgement method
Hiroki Taniguchi, Musashino (JP); Masanori Nakamura, Musashino (JP); Shuto Yamamoto, Musashino (JP); Akira Masuda, Musashino (JP); and Yoshiaki Kisaka, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/594,926
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed May 8, 2020, PCT No. PCT/JP2020/018625
§ 371(c)(1), (2) Date Nov. 4, 2021,
PCT Pub. No. WO2020/226172, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 2019-088531 (JP), filed on May 8, 2019.
Prior Publication US 2022/0224575 A1, Jul. 14, 2022
Int. Cl. H04L 27/01 (2006.01)
CPC H04L 27/01 (2013.01) 8 Claims
OG exemplary drawing
 
1. A symbol determination device comprising:
a provisional determiner configured to generate a symbol sequence by performing adaptive equalization by an estimation inverse transfer function of a transmission line on a reception signal sequence extracted from the transmission line, and perform provisional determination on the symbol sequence;
a transmission estimator configured to generate, based on a plurality of the symbol sequences indicating transmission line states and an estimation transfer function of the transmission line, an estimation reception symbol sequence for each of the transmission line states;
a sequence estimation algorithm processor configured to calculate a metric between the symbol sequence obtained from the reception signal sequence and each of a plurality of the estimation reception symbol sequences, and select a most likelihood estimation reception symbol sequence of the plurality of the estimation reception symbol sequences by a predetermined algorithm, based on the calculated metric, a provisional determination symbol provisionally determined by the provisional determiner, and nearby symbols of the provisional determination symbol; and
a path tracing determiner configured to determine a transmission symbol sequence by tracing back paths of trellis, based on the most likelihood estimation reception symbol sequence,
wherein the sequence estimation algorithm processor generates a plurality of the symbol sequences indicating the transmission line states in a range of the provisional determination symbol and the nearby symbols of the provisional determination symbol to output the plurality of the symbol sequences to the transmission line estimator,
wherein each of the provisional determiner, the transmission line estimator, the sequence estimation algorithm processor, and the path tracing determiner is implemented by:
i) computer executable instructions executed by at least one processor,
ii) at least one circuitry or
iii) a combination of computer executable instructions executed by at least one processor and at least one circuitry.