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1. 发明授权

US10230509B2 OFDM frame communication method and apparatus 有权
公开(公告)号：US10230509B2
公开(公告)日：2019-03-12
申请号：US15713989
申请日：2017-09-25
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
IPC分类号： H04W4/00 , H04L5/00 , H04B7/0417 , H04L27/26 , H04J11/00 , H04B7/0413 , H04W72/04 , H04B7/06 , H04B7/08 , H04L25/02
摘要： A first radio signal is received that was transmitted from a first antenna at a transmitter and a second radio signal transmitted from a second antenna at the transmitter different from the first antenna. The first radio signal is converted to a first orthogonal frequency division multiplexing (OFDM) frame signal, and the second radio signal is converted to a second OFDM frame signal. The first OFDM frame signal includes a grid of multiple frequency subcarriers and time periods, each time period with the frequency carriers corresponding to a first OFDM symbol such that the first OFDM frame includes first OFDM symbols. A first OFDM symbol is carried on frequency subcarriers during a time period, and the first OFDM frame includes first reference OFDM symbols located at corresponding time-frequency resource elements in the grid. Each resource element is defined by a one of the frequency subcarriers and one of the time periods. The second OFDM frame signal is similar and includes second reference OFDM symbols sharing the same grid of frequency subcarriers and time periods as the first OFDM frame. But the second reference OFDM symbols are located at corresponding time-frequency resource elements in the grid different than the corresponding time-frequency resource elements to which the first reference OFDM signals are located their respective OFDM frame signals. The first and second reference OFDM symbols are used to demodulate the first and second OFDM frame signals.

2. 发明授权

US08891678B2 Receiving apparatus and receiving method 有权
标题翻译：接收装置和接收方法
公开(公告)号：US08891678B2
公开(公告)日：2014-11-18
申请号：US13839910
申请日：2013-03-15
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00 , H04L27/12 , H04L1/06 , H04L27/04 , H04L27/14 , H04B7/04 , H04B7/06 , H04B7/08 , H04L25/02 , H04L27/26
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A receiver receives, using a plurality of antennas, a multiplexed signal that includes (i) a first OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying a pilot symbol and a subcarrier carrying a data symbol and (ii) a second OFDM modulation signal with a subcarrier carrying a symbol including multiplex information and a subcarrier carrying the pilot symbol and a subcarrier carrying the data symbol. A decoder uses the symbol including multiplex information and decodes the data symbol.
摘要翻译：接收机使用多个天线接收多路复用信号，该多路复用信号包括：（i）第一OFDM调制信号与携带包含复用信息的符号的副载波和携带导频符号的子载波和携带数据符号的子载波，以及（ii）具有携带包含复用信息的符号的子载波的第二OFDM调制信号和承载导频符号的子载波以及承载数据符号的副载波。解码器使用包括复用信息的符号并对数据符号进行解码。

3. 再颁专利

USRE45037E1 Method for modulation and transmission apparatus 有权
标题翻译：调制和传输设备的方法
公开(公告)号：USRE45037E1
公开(公告)日：2014-07-22
申请号：US13916324
申请日：2013-06-12
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Morikazu Sagawa
IPC分类号： H04L27/20
CPC分类号： H04L27/0008 , H04L25/0232 , H04L27/34
摘要： An input digital signal is periodically and alternately subjected to first modulation and second modulation, being thereby converted into a pair of a baseband I signal and a baseband Q signal. The first modulation and the second modulation are different from each other. The pair of the baseband I signal and the baseband Q signal are outputted. The first modulation may be at least 8-signal-point modulation while the second modulation may be phase shift keying.
摘要翻译：输入数字信号周期性地交替进行第一调制和第二调制，从而转换成一对基带I信号和基带Q信号。第一调制和第二调制彼此不同。输出一对基带I信号和基带Q信号。第一调制可以是至少8信号点调制，而第二调制可以是相移键控。

4. 发明授权

US09800378B2 OFDM frame transmission method and apparatus 有权
公开(公告)号：US09800378B2
公开(公告)日：2017-10-24
申请号：US14751658
申请日：2015-06-26
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
IPC分类号： H04W4/00 , H04L5/00 , H04B7/0417 , H04L27/26 , H04J11/00 , H04B7/0413 , H04W72/04 , H04B7/06 , H04B7/08 , H04L25/02
CPC分类号： H04L5/0048 , H04B7/0413 , H04B7/0417 , H04B7/0613 , H04B7/0837 , H04J11/00 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04L27/2647 , H04L27/2657 , H04L27/2662 , H04W72/0453
摘要： A first orthogonal frequency division multiplexing (OFDM) frame signal is generated that includes a grid of multiple frequency subcarriers and multiple time periods. An OFDM symbol is transmitted using multiple frequency subcarriers during a time period and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid, Each resource element is defined by a one of the multiple frequency subcarriers and one of the multiple time periods. A second orthogonal frequency division multiplexing (OFDM) frame signal is generated that includes a grid of multiple frequency subcarriers and multiple time periods and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid. The time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the first OFDM frame signal are different from the time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the second OFDM frame signal. The first OFDM frame signal is converted to a first radio signal and the second OFDM frame signal to a second radio signal. The first radio signal is transmitted from a first antenna and the second radio signal from a second, different antenna.

5. 发明授权

US09083480B2 OFDM frame transmission method and apparatus 有权
标题翻译： OFDM帧传输方法和装置
公开(公告)号：US09083480B2
公开(公告)日：2015-07-14
申请号：US13770199
申请日：2013-02-19
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
IPC分类号： H04J1/00 , H04J3/00 , H04B7/212 , H04J11/00 , H04B7/04 , H04L27/26 , H04B7/06 , H04B7/08 , H04L5/00 , H04L25/02
CPC分类号： H04L5/0048 , H04B7/0413 , H04B7/0417 , H04B7/0613 , H04B7/0837 , H04J11/00 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04L27/2647 , H04L27/2657 , H04L27/2662 , H04W72/0453
摘要： A transmission method includes generating a plurality of orthogonal frequency division multiplexing (OFDM) signals, each signal including different data and some of the plurality of OFDM signals including pilot symbols. The pilot symbols are assigned to a predetermined subcarrier in predetermined time. At least one of the plurality of OFDM signals is assigned the pilot symbols to the predetermined subcarrier in the predetermined time, and other OFDM signals are assigned data to the predetermined subcarrier in the predetermined time. The method further includes converting each of the plurality of OFDM signals to a radio signal and transmitting each of the radio signals from a different antenna.
摘要翻译：传输方法包括：生成多个正交频分复用（OFDM）信号，每个信号包括不同数据，并且包括导频符号的多个OFDM信号中的一些。在预定时间内将导频符号分配给预定的子载波。将多个OFDM信号中的至少一个在预定时间内分配给预定子载波，并且在预定时间内将其他OFDM信号分配给预定子载波。该方法还包括将多个OFDM信号中的每一个转换成无线电信号，并且从不同的天线发送每个无线电信号。

6. 发明授权

US11018821B2 OFDM frame communication method and apparatus 有权
公开(公告)号：US11018821B2
公开(公告)日：2021-05-25
申请号：US16285646
申请日：2019-02-26
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
IPC分类号： H04W72/04 , H04L5/00 , H04B7/0417 , H04L27/26 , H04J11/00 , H04B7/0413 , H04B7/06 , H04B7/08 , H04L25/02
摘要： A first OFDM frame signal includes a grid of multiple frequency subcarriers and multiple time periods.—An OFDM symbol is transmitted using multiple frequency subcarriers during a time period and includes known reference OFDM symbols assigned to corresponding time-frequency resource elements in the grid. —Each resource element is defined by a one of the multiple frequency subcarriers and one of the multiple time periods. —A second OFDM frame signal is also generated, but the resource elements assigned to the known reference OFDM symbols are different from the time-frequency resource elements in the grid assigned to the known reference OFDM symbols in the first OFDM frame signal. The first and second OFDM frame signals are converted to a first and second radio signals. The first radio signal is transmitted from a first antenna and the second radio signal from a second, different antenna.

7. 发明授权

US09048988B2 Transmission signal generation apparatus, transmission signal generation method, reception signal generation apparatus, and reception signal generation method 有权
标题翻译：发送信号生成装置，发送信号生成方法，接收信号生成装置以及接收信号生成方法
公开(公告)号：US09048988B2
公开(公告)日：2015-06-02
申请号：US14067737
申请日：2013-10-30
申请人： Optis Wireless Technology, LLC
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi
IPC分类号： H04L27/00 , H04L5/00 , H04L27/26 , H04J13/18 , H04L25/02
CPC分类号： H04L5/0048 , H04B7/0413 , H04B2201/70701 , H04J13/18 , H04L5/0007 , H04L5/0023 , H04L25/0206 , H04L27/2613 , H04L27/2628 , H04L27/265 , H04L27/2657 , H04L2027/0024
摘要： Multiple-Input and Multiple-Output (MIMO)-Orthogonal Frequency Division Multiplexing (OFDM) communication is provided which allows high accuracy estimation of frequency offset, high accuracy estimation of a transmission path fluctuation and high accuracy synchronization/signal detection. Pilot symbol mapping is provided for forming pilot carriers by assigning orthogonal sequences to corresponding subcarriers among OFDM signals which are transmitted at the same time from respective antennas in the time domain. Even when pilot symbols are multiplexed among a plurality of channels (antennas), this allows frequency offset/phase noise to be estimated with high accuracy.
摘要翻译：提供多输入多输出（MIMO） - 正交频分复用（OFDM）通信，其允许对频偏的高精度估计，传输路径波动的高精度估计和高精度同步/信号检测。提供导频符号映射，用于通过在从时域中的相应天线同时发送的OFDM信号中分配正交序列到对应的子载波来形成导频载波。即使在多个信道（天线）中复用导频符号的情况下，也能够高精度地估计频率偏移/相位噪声。

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