专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US07583737B2 OFDM signal receiver device and OFDM signal receiving method 失效
标题翻译： OFDM信号接收设备和OFDM信号接收方法
公开(公告)号：US07583737B2
公开(公告)日：2009-09-01
申请号：US10555443
申请日：2003-12-19
申请人： Jun Ido , Eiji Arita
发明人： Jun Ido , Eiji Arita
IPC分类号： H04K1/10
CPC分类号： H03M13/4107 , H03M13/658 , H04L1/0047 , H04L1/0054 , H04L25/0232 , H04L25/03159 , H04L27/2647
摘要： The present invention relates to a OFDM signal receiver device that performs weighting for branch metrics based on average noise power or signal-to-noise power ratio and conducts Viterbi decoding based on the result of the weighting. In the present invention, based on a demodulated signal, electric power corresponding to a noise component contained in the demodulated signal is calculated. A noise power signal corresponding to the result of the calculation is output from a noise power-calculating unit 8. Based on the noise power signal and a transmission channel characteristic corresponding to a subcarrier component that is output from an interpolation filter unit, a weighing factor for a branch metric is calculated by a weighting factor-calculating unit 9, and based on the weighting factor, the demodulated signal is decoded by decoding unit 10.
摘要翻译：本发明涉及一种基于平均噪声功率或信噪比功率比对分支度量进行加权的OFDM信号接收机装置，并且基于加权结果进行维特比解码。在本发明中，基于解调信号，计算与解调信号中包含的噪声成分对应的电力。从噪声功率计算单元8输出与计算结果相对应的噪声功率信号。基于噪声功率信号和对应于从内插滤波器单元输出的副载波分量的传输信道特性，称重系数通过加权因子计算单元9计算分支度量，并且基于加权因子，解调信号由解码单元10解码。

32. 发明申请

US20080238808A1 Diversity receiver 失效
标题翻译：分集接收机
公开(公告)号：US20080238808A1
公开(公告)日：2008-10-02
申请号：US12068962
申请日：2008-02-13
申请人： Eiji Arita , Jun Ido , Akiko Maeno
发明人： Eiji Arita , Jun Ido , Akiko Maeno
IPC分类号： H01Q21/00
CPC分类号： H01Q3/28 , H01Q3/24 , H01Q3/30 , H01Q21/20 , H04B7/0848 , H04B7/0868 , H04N5/4401 , H04N21/4263 , H04N21/6112
摘要： A diversity receiver is provided with antennas (1a) and (1b) in a first branch and antennas (1c) and (1d) in a second branch each of which antenna gains is controlled so that the offset between the directions of directional radiation patterns for the first and second branches becomes approximately π/2. Thereby, the diversity receiver can obtain a sufficient diversity gain even when it is incorporated into an indoor television with the antennas being built thereinto in close vicinity to one another.
摘要翻译：分集接收机在第一分支中设置有天线（1a）和（1b），天线（1c）和（1d）在第二支路中分别天线增益被控制，使得在用于第一和第二分支的定向辐射图形变为近似pi / 2。因此，分集接收机即使在内置有天线的室内电视中也可以获得足够的分集增益。

33. 发明申请

US20070036231A1 Demodulation device and demodulation method 失效
标题翻译：解调设备和解调方法
公开(公告)号：US20070036231A1
公开(公告)日：2007-02-15
申请号：US10555530
申请日：2003-12-19
申请人： Jun Ido
发明人： Jun Ido
IPC分类号： H04K1/10 , H04B1/10 , H04L7/00
CPC分类号： H04L25/0234 , H04L5/0048 , H04L25/0216 , H04L25/0222 , H04L27/2655 , H04L27/2665
摘要： The present invention relates to a demodulation device and a demodulation method, and its object is to demodulate subcarrier components utilizing estimated delay profiles to control the timing for performing a Fourier transform and the pass band of an interpolation filter used in interpolating transmission channel characteristics along a frequency axis so as to suppress unnecessary noise components, whereby an error rate after the demodulation is reduced. To achieve the object, in a demodulation device according to the present invention, a Fourier transform unit 1 performs a Fourier transform according to a timing signal and an interpolation filter unit 18 sets a pass band of a frequency interpolation filter used for interpolation along the frequency axis based on a signal corresponding to a maximum delay time, whereby the frequency band of a transmission channel characteristic corresponding to a subcarrier component is restricted when it is output.
摘要翻译：解调装置和解调方法技术领域本发明涉及解调装置和解调方法，其目的是利用估计的延迟分布来解调副载波分量，以控制用于执行傅里叶变换的定时，以及沿着沿内部传送信道特性内插的内插滤波器的通带频率轴，以抑制不必要的噪声分量，从而降低了解调之后的误码率。为了实现该目的，在根据本发明的解调装置中，傅立叶变换单元1根据定时信号进行傅立叶变换，并且内插滤波器单元18设置沿着频率进行插值的频率插值滤波器的通带基于对应于最大延迟时间的信号，由此当输出与子载波分量对应的传输信道特性的频带受到限制。

34. 发明申请

US20060166634A1 Diversity receprtion device and diversity reception method 失效
标题翻译：分集接收装置和分集接收方法
公开(公告)号：US20060166634A1
公开(公告)日：2006-07-27
申请号：US10527424
申请日：2003-10-27
申请人： Jun Ido
发明人： Jun Ido
IPC分类号： H04B7/08 , H04B1/06
CPC分类号： H04L1/20 , H04B7/0808 , H04B7/084 , H04L27/2647
摘要： The circuit size of a diversity receiver for an orthogonal frequency division multiplexing signal is reduced, and the diversity effect is increased, by providing a power ratio comparator that calculates a difference value as a ratio of powers derived from channel estimation results for subcarrier components received from two antennas (11), (21) and compares the calculated difference value with a predetermined threshold, and a selective/equal gain combining selector (33) that outputs one of the received demodulated signals when the comparison result indicates that the calculated difference value is greater than the threshold value.
摘要翻译：减小正交频分多路复用信号的分集接收机的电路尺寸，并通过提供一个功率比比较器来提供分集效应，该功率比比较器将从差分值计算出的差值作为从从两个天线（11），（21），并将所计算的差值与预定阈值进行比较;以及选择/等效增益组合选择器（33），当所述比较结果指示所计算出的差值为大于阈值。

35. 发明申请

US20060056280A1 Ofdm signal receiver device and ofdm signal receiving method 失效
标题翻译： Ofdm信号接收设备和信号接收方式
公开(公告)号：US20060056280A1
公开(公告)日：2006-03-16
申请号：US10555443
申请日：2003-12-19
申请人： Jun Ido , Eiji Arita
发明人： Jun Ido , Eiji Arita
IPC分类号： H04J11/00
CPC分类号： H03M13/4107 , H03M13/658 , H04L1/0047 , H04L1/0054 , H04L25/0232 , H04L25/03159 , H04L27/2647
摘要： The present invention relates to a OFDM signal receiver device that performs weighting for branch metrics based on average noise power or signal-to-noise power ratio and conducts Viterbi decoding based on the result of the weighting. In the present invention, based on a demodulated signal, electric power corresponding to a noise component contained in the demodulated signal is calculated, A noise power signal corresponding to the result of the calculation is output from a noise power-calculating unit 8. Based on the noise power signal and a transmission channel characteristic corresponding to a subcarrier component that is output from an interpolation filter unit, a weighing factor for a branch metric is calculated by a weighting factor-calculating unit 9, and based on the weighting factor, the demodulated signal is decoded by decoding unit 10.
摘要翻译：本发明涉及一种基于平均噪声功率或信噪比功率比对分支度量进行加权的OFDM信号接收机装置，并且基于加权结果进行维特比解码。在本发明中，基于解调信号，计算与解调信号中包含的噪声成分对应的电力，从噪声功率计算部8输出与计算结果对应的噪声功率信号。基于噪声功率信号和与从内插滤波器单元输出的副载波分量相对应的传输信道特性，由加权系数计算单元9计算分支量度的加权因子，并且基于加权因子，解调信号由解码单元10解码。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式