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91. 发明授权

US07826514B2 Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio transmission using code spread 有权
标题翻译：无线电发射机接收设备和用于使用码扩展估计无线电传输中的噪声和干扰功率的无线电发射接收方法
公开(公告)号：US07826514B2
公开(公告)日：2010-11-02
申请号：US10526225
申请日：2004-04-26
申请人： Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
发明人： Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
IPC分类号： H04B1/00
CPC分类号： H04L5/026 , H04J11/0036 , H04J13/004 , H04L27/2613
摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.
摘要翻译：一种无线电发射机 - 接收机，其中在发射机中使用导频符号，该发射机在频率轴上经过M码片扩频，并在时间轴上以N×M码片长度的扩频码（其中M和N为任何整数等于或大于2），并且在接收机中，将不用于扩展所述导频信号的扩展码用作解扩码以对接收信号进行解扩，然后估计噪声和干扰功率。用于扩展导频符号的扩展码和解扩使用的解扩码被分配为正交，即使只在时间轴上的N个码片。

92. 发明授权

US07526041B2 Channel estimation circuit and channel estimation method 失效
标题翻译：信道估计电路和信道估计方法
公开(公告)号：US07526041B2
公开(公告)日：2009-04-28
申请号：US10554097
申请日：2004-04-26
申请人： Yoshikazu Kakura , Hiroyuki Atarashi , Noriyuki Maeda
发明人： Yoshikazu Kakura , Hiroyuki Atarashi , Noriyuki Maeda
IPC分类号： H04B15/00 , H04B1/69
CPC分类号： H04L25/0224
摘要： A channel estimation circuit of the present invention includes: a tentative channel estimation unit for performing channel estimation by making use of a received signal and outputting the result of estimation as a tentative channel estimation signal; a noise/interference power estimation unit for estimating noise and interference power by making use of the received signal and outputting the result of estimation as a noise/interference power estimation signal; a threshold decision unit for establishing a threshold signal by making use of the noise/interference power estimation signal to output the threshold signal; and an effective path detection unit for outputting, as a channel estimation signal, paths of the tentative channel estimation signal that remains after noise paths having powers smaller than the threshold signal have been removed.
摘要翻译：本发明的信道估计电路包括：临时信道估计单元，用于通过使用接收信号进行信道估计，并将估计结果作为暂时信道估计信号输出; 噪声/干扰功率估计单元，用于通过使用接收信号来估计噪声和干扰功率，并将估计结果作为噪声/干扰功率估计信号输出; 阈值判定单元，用于通过利用噪声/干扰功率估计信号建立阈值信号，以输出阈值信号; 以及有效路径检测单元，用于作为信道估计信号输出在具有小于阈值信号的功率的噪声路径之后保留的临时信道估计信号的路径。

93. 发明申请

US20060182167A1 Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio tramission using code spread 有权
标题翻译：无线发射机接收装置和无线电发射接收方法，用于使用码扩展来估计无线电电路中的噪声和干扰功率
公开(公告)号：US20060182167A1
公开(公告)日：2006-08-17
申请号：US10526225
申请日：2004-04-26
申请人： Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
发明人： Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
IPC分类号： H04B1/707
CPC分类号： H04L5/026 , H04J11/0036 , H04J13/004 , H04L27/2613
摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.
摘要翻译：一种无线电发射机 - 接收机，其中在发射机中使用导频符号，该发射机在频率轴上经历了M码片扩频，并且在时间轴上通过M×N码片长度的扩展码（其中M和N是任何整数）进行N码片扩频等于或大于2），并且在接收机中，将不用于扩展所述导频信号的扩展码用作解扩码，以对接收信号进行解扩，然后估计噪声和干扰功率。用于扩展导频符号的扩展码和解扩使用的解扩码被分配为正交，即使只在时间轴上的N个码片。

94. 发明授权

US07532864B2 Noise power estimation method and noise power estimation device 失效
标题翻译：噪声功率估计方法和噪声功率估计装置
公开(公告)号：US07532864B2
公开(公告)日：2009-05-12
申请号：US10524213
申请日：2004-02-16
申请人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
发明人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
IPC分类号： H04B17/00
CPC分类号： H04B1/7097 , H04B17/345 , H04B2201/70701 , H04L1/20
摘要： A pilot extract section 14 extracts a pilot signal from received signal. An adder 21 in-phase adds a plurality of correlated values of pilot signals for respective subcarriers. Delay devices 201-1 to 201-6 temporarily maintain one in-phase added value. Multiplier 202-1 to 202-6 multiplies a predetermined coefficient to the in-phase added value that is output from the delay device. The predetermined coefficient reflects the result, which is obtained by correcting for multiple times the difference of channel variation in the different subcarriers that is generated when noise power per one subcarrier is calculated. Each of the multiplying results is added by an adder 24, and is squared by a square device 25. A cumulative adder 26 cumulative-adds the squared values for the whole subcarrier. A multiplier 203 averages by multiplying predetermined values to the cumulative-added values. Having such configuration, even if the correlation between adjacent subcarriers becomes lower by frequency selective fading, the accuracy for estimating noise power can be improved.
摘要翻译：导频提取部分14从接收信号中提取导频信号。同相的加法器21对各个副载波添加导频信号的多个相关值。延迟装置201-1至201-6暂时保持一个同相的附加值。乘法器202-1至202-6将预定系数与从延迟装置输出的同相相加值相乘。预定系数反映通过多次计算在每个子载波的噪声功率被计算时产生的不同子载波中的信道变化的差异而获得的结果。乘法结果中的每一个由加法器24相加，并由平方装置25平方。累积加法器26对整个子载波进行累加 - 相加。乘法器203通过将预定值乘以累积附加值来平均。具有这样的配置，即使相邻副载波之间的相关性通过频率选择性衰落变得较低，也可以提高估计噪声功率的精度。

95. 发明申请

US20060154608A1 Noise power estimation method and noise power estimation device 失效
标题翻译：噪声功率估计方法和噪声功率估计装置
公开(公告)号：US20060154608A1
公开(公告)日：2006-07-13
申请号：US10524213
申请日：2004-02-16
申请人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
发明人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
IPC分类号： H04B17/00
CPC分类号： H04B1/7097 , H04B17/345 , H04B2201/70701 , H04L1/20
摘要： A pilot extract section 14 extracts a pilot signal from received signal. An adder 21 in-phase adds a plurality of correlated values of pilot signals for respective subcarriers. Delay devices 201-1 to 201-6 temporarily maintain one in-phase added value. Multiplier 202-1 to 202-6 multiplies a predetermined coefficient to the in-phase added value that is output from the delay device. The predetermined coefficient reflects the result, which is obtained by correcting for multiple times the difference of channel variation in the different subcarriers that is generated when noise power per one subcarrier is calculated. Each of the multiplying results is added by an adder 24, and is squared by a square device 25. A cumulative adder 26 cumulative-adds the squared values for the whole subcarrier. A multiplier 203 averages by multiplying predetermined values to the cumulative-added values. Having such configuration, even if the correlation between adjacent subcarriers becomes lower by frequency selective fading, the accuracy for estimating noise power can be improved.
摘要翻译：导频提取部分14从接收信号中提取导频信号。同相的加法器21对各个副载波添加导频信号的多个相关值。延迟装置201-1至201-6暂时保持一个同相的附加值。乘法器202-1至202-6将预定系数与从延迟装置输出的同相相加值相乘。预定系数反映通过多次计算在每个子载波的噪声功率被计算时产生的不同子载波中的信道变化的差异而获得的结果。乘法结果中的每一个由加法器24相加，并由平方装置25平方。累积加法器26对整个子载波进行累加 - 相加。乘法器203通过将预定值乘以累积附加值来平均。具有这样的配置，即使相邻副载波之间的相关性通过频率选择性衰落变得较低，也可以提高估计噪声功率的精度。

96. 发明申请

US20060222119A1 Channel estimation circuit and channel estimation method 失效
标题翻译：信道估计电路和信道估计方法
公开(公告)号：US20060222119A1
公开(公告)日：2006-10-05
申请号：US10554097
申请日：2004-04-26
申请人： Yoshikazu Kakura , Hiroyuki Atarashi , Noriyuki Maeda
发明人： Yoshikazu Kakura , Hiroyuki Atarashi , Noriyuki Maeda
IPC分类号： H03D1/04
CPC分类号： H04L25/0224
摘要： A channel estimation circuit (101) of the present invention includes: a tentative channel estimation unit (102) for performing channel estimation by making use of a received signal and outputting the result of estimation as a tentative channel estimation signal; a noise/interference power estimation unit (103) for estimating noise and interference power by making use of the received signal and outputting the result of estimation as a noise/interference power estimation signal; a threshold decision unit (104) for establishing a threshold signal by making use of the noise/interference power estimation signal to output the threshold signal; and an effective path detection unit (105) for outputting, as a channel estimation signal, paths of the tentative channel estimation signal that remains after noise paths having powers smaller than the threshold signal have been removed.
摘要翻译：本发明的信道估计电路（101）包括：暂定信道估计单元（102），用于通过利用接收信号进行信道估计并输出估计结果作为暂时信道估计信号; 噪声/干扰功率估计单元，用于通过利用接收信号来估计噪声和干扰功率，并将估计结果作为噪声/干扰功率估计信号输出; 阈值判定单元，用于通过利用所述噪声/干扰功率估计信号建立阈值信号以输出所述阈值信号; 以及有效路径检测单元（105），用于作为信道估计信号输出在具有小于阈值信号的功率的噪声路径已经被去除之后剩余的暂时信道估计信号的路径。

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