公开(公告)号：US20180038942A1

公开(公告)日：2018-02-08

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: G01S7/295 ,  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：US20180034521A1

公开(公告)日：2018-02-01

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: H04B7/04 ,  H04L5/00

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.

公开(公告)号：US20150103944A1

公开(公告)日：2015-04-16

申请号：US14051672

申请日：2013-10-11

Applicant: NIPPON HOSO KYOKAI

Inventor： Takuya SHITOMI ,  Kenichi MURAYAMA ,  Makoto TAGUCHI ,  Shingo ASAKURA ,  Kazuhiko SHIBUYA

IPC: H04L27/26

CPC classification number: H04L27/2627 ,  H04B7/0669 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2649

Abstract: A transmission apparatus configured to transmit four OFDM signals from four transmission antennas includes: a pilot signal insertion unit configured to generate four types of OFDM symbols by inserting pilot signals of different patterns into four types of transmission signals; and an OFDM signal generation unit configured to generate four OFDM signals by modulating respective carriers of the four types of OFDM symbols. The pilot signal insertion unit is configured to insert, with respect to first and second transmission signals, pilot signals having a meaningful value and pilot signals of null signals; insert, with respect to third and fourth transmission signals, pilot signals having a meaningful value, pilot signals obtained by inverting codes of the pilot signals having a meaningful value, and pilot signals of null signals; insert, with respect to the first and third transmission signals, the pilot signals of null signals in identical predetermined positions; and insert, with respect to the second and fourth transmission signals, the pilot signals of null signals in positions different from the identical predetermined positions.

Abstract translation: 一种被配置为从四个发送天线发送四个OFDM信号的发送装置包括：导频信号插入单元，被配置为通过将不同模式的导频信号插入到四种类型的发送信号中来生成四种类型的OFDM符号; OFDM信号生成部，被配置为通过调制四种类型的OFDM符号的各个载波来生成4个OFDM信号。 导频信号插入单元被配置为相对于第一和第二传输信号插入具有有意义的值的导频信号和空信号的导频信号; 针对第三和第四传输信号插入具有有意义值的导频信号，通过反转具有有意义值的导频信号的代码获得的导频信号和空信号的导频信号; 相对于第一和第三传输信号插入相同预定位置的零信号的导频信号; 并且相对于第二和第四传输信号，在与相同的预定位置不同的位置插入空信号的导频信号。