公开(公告)号：US10771132B2

公开(公告)日：2020-09-08

申请号：US15549221

申请日：2016-02-09

Applicant: NIPPON HOSO KYOKAI ,  NHK Engineering System, Inc.

Inventor： Shingo Asakura ,  Madoka Honda ,  Kenichi Murayama ,  Takuya Shitomi ,  Susumu Saito ,  Yoshikazu Narikiyo ,  Hiroaki Miyasaka ,  Akihiko Satou ,  Tomoaki Takeuchi ,  Kenichi Tsuchida ,  Masahiro Okano ,  Masayuki Takada ,  Kazuhiko Shibuya

IPC: H04B7/0456 ,  H04L5/00 ,  H04L9/08 ,  H04L5/02

Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.

公开(公告)号：US10020821B2

公开(公告)日：2018-07-10

申请号：US15035548

申请日：2014-11-13

Applicant: NIPPON HOSO KYOKAI

Inventor： Youichi Suzuki ,  Akinori Hashimoto ,  Shoji Tanaka ,  Kenichi Tsuchida ,  Takeshi Kimura ,  Yoshifumi Matsusaki

IPC: H03M13/11 ,  H04L1/00 ,  H03M13/00 ,  H03M13/25 ,  H03M13/03 ,  H03M13/27 ,  H03M13/29 ,  H03M13/15

CPC classification number: H03M13/1177 ,  H03M13/036 ,  H03M13/1102 ,  H03M13/1165 ,  H03M13/152 ,  H03M13/255 ,  H03M13/2792 ,  H03M13/2906 ,  H03M13/616 ,  H03M13/6356 ,  H04L1/00 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0071

Abstract: A transmission device and reception device for digital data that have excellent resistance to noise are provided. An encoder (11-1) of this disclosure, included in a transmission device (1) of this disclosure, applies LDPC encoding to digital data using a unique check matrix for each code rate by using a check matrix in which, taking a check matrix initial value table established in advance for each code rate at a code length of 44880 bits as initial values, 1 entries of a partial matrix corresponding to an information length appropriate for a code rate of 93/120 are allocated in the column direction over a cycle of 374 columns. A demodulator (23) of this disclosure, included in a reception device (2) of this disclosure, decodes digital data encoded by the encoder (11-1).

公开(公告)号：US10009078B2

公开(公告)日：2018-06-26

申请号：US15549550

申请日：2016-02-09

Applicant: NIPPON HOSO KYOKAI ,  NHK Engineering System, Inc.

Inventor： Shingo Asakura ,  Madoka Honda ,  Kenichi Murayama ,  Takuya Shitomi ,  Susumu Saito ,  Yoshikazu Narikiyo ,  Hiroaki Miyasaka ,  Akihiko Satou ,  Tomoaki Takeuchi ,  Kenichi Tsuchida ,  Masahiro Okano ,  Masayuki Takada ,  Kazuhiko Shibuya

IPC: H04L27/10 ,  H04B7/04 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/0469 ,  G01S7/295 ,  H04B7/0697 ,  H04L5/0016 ,  H04L5/023

Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.