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1. 发明授权

EP1022874B1 Apparatus and method for digital wireless communications 有权
标题翻译：设备和方法，用于非数字传输schnurr
公开(公告)号：EP1022874B1
公开(公告)日：2007-10-17
申请号：EP00100828.3
申请日：2000-01-17
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD
发明人： Murakami, Yutaka , Takabayashi, Shinichiro , Orihashi, Masayuki , Matsuoka, Akihiko
IPC分类号： H04L7/04
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093

2. 发明公开

EP1628452A2 Modulation method and radio communication system 审中-公开
标题翻译：调制方法和无线电通信系统
公开(公告)号：EP1628452A2
公开(公告)日：2006-02-22
申请号：EP05023314.7
申请日：1999-01-28
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Orihashi, Masayuki , Matsuoka, Akihiko , Sagawa, Morikazu
IPC分类号： H04L27/34
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受到第一调制和第二调制，由此被转换成一对基带I信号和基带Q信号。第一调制和第二调制彼此不同。输出该对基带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。

3. 发明公开

EP1363438A3 Modulation method and radio communication system 审中-公开
标题翻译：调制方法和无线通信系统
公开(公告)号：EP1363438A3
公开(公告)日：2004-02-11
申请号：EP03017278.7
申请日：1999-01-28
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Orihashi, Masayuki , Matsuoka, Akihiko , Sagawa, Morikazu
IPC分类号： H04L27/34
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 may be at least 8-signal-point modulation while the second modulation may be phase shift keying. The output symbol stream is divided into frames each of which comprises a header formed by one symbol modulated with the second modulation, followed by a number of symbols modulated with the first modulation. The header is used in the receiver for estimating a frequency or an amplitude distortion and for the subsequent compensation.

4. 发明公开

EP0951151A3 Pilot signal transmission technique and digital communication system using same 有权
标题翻译： Pilotsignalsnübertragungstechnik这些用数字通信系统
公开(公告)号：EP0951151A3
公开(公告)日：2004-01-28
申请号：EP99107576.3
申请日：1999-04-15
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Orihashi, Masayuki , Matsuoka, Akihiko , Sakawa, Morikazu
IPC分类号： H04B7/005 , H04L27/34
CPC分类号： H04L27/3455
摘要： In a digital communication system such as a mobile radio system, fading distortion is compensated with a raised precision. In a transmitter, pilot signals are regularly inserted in the information signals. The amplitude of the pilot signals are set larger than the maximum possible amplitude of the information signals. The modulation scheme of the pilot signals may be different from that of the information signals. In a receiver, the fading distortion of each of the pilot signals is determined. The fading distortions of the information signals are estimated by interpolation using the determined fading distortion of the pilot signal, and then compensated. The frequency band of each information signal is preferably limited with a roll-off filter with a roll-off coefficient ranging from 0.1 to 0.4.

5. 发明公开

EP1363438A2 Modulation method and radio communication system 审中-公开
标题翻译： Modulationverfahren und Funkkmunmunations系统
公开(公告)号：EP1363438A2
公开(公告)日：2003-11-19
申请号：EP03017278.7
申请日：1999-01-28
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Orihashi, Masayuki , Matsuoka, Akihiko , Sagawa, Morikazu
IPC分类号： H04L27/34
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。第一调制可以是至少8信号点调制，而第二调制可以是相移键控。输出符号流被划分为帧，每个帧包括由用第二调制调制的一个符号形成的报头，随后是用第一调制调制的多个符号。在接收机中使用报头来估计频率或幅度失真以及随后的补偿。

6. 发明公开

EP1077533A1 Digital mobile wireless terminal and system using the same 审中-公开
标题翻译： Drahtloses digitalesMobilfunkendgerät，und ein dieses verwendendes System
公开(公告)号：EP1077533A1
公开(公告)日：2001-02-21
申请号：EP00306746.9
申请日：2000-08-08
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Takabayashi, Shinichiro , Orihashi, Masayuki , Matsuoka, Akihiko
IPC分类号： H04B7/005 , H04B17/00 , H04L1/00 , H04L1/20
CPC分类号： H04L1/20 , H04B7/01 , H04B17/318 , H04B17/391 , H04L2027/0028 , H04W52/20
摘要： A digital-mobile-wireless-communications apparatus and the system using the same evaluate a transmission environment of transmission paths. The communications apparatus calculates not only a Doppler frequency of carrier waves based on a velocity of the communications apparatus, but also a receiving-electric-field intensity based on a received radio wave. Furthermore, it has a capability of acquiring the transmission environment of the transmission paths by an evaluation based on the calculated two results, i.e., the Doppler frequency and the receiving-electric-field intensity and data in a bit-error-rate (BER) vs. receiving-electric-field-intensity characteristics model using a carrier frequencies' shift (Doppler frequency) as a parameter.
摘要翻译：数字移动无线通信装置及其使用的系统评估传输路径的传输环境。通信装置不仅基于通信装置的速度来计算载波的多普勒频率，而且还基于接收到的无线电波来计算接收电场强度。此外，它具有通过基于所计算的两个结果（即，多普勒频率和接收电场强度以及误比特率（BER）的数据）的评估来获取传输路径的传输环境的能力，与使用载波频率（多普勒频率）作为参数的接收电场强度特性模型进行比较。

7. 发明公开

EP1028566A2 Distortion estimation apparatus, frequency offset compensation apparatus and reception apparatus for QAM signals 审中-公开
标题翻译：用于估计所述失真的装置，用于补偿频率偏移，以及用于QAM信号接收装置
公开(公告)号：EP1028566A2
公开(公告)日：2000-08-16
申请号：EP00102770.5
申请日：2000-02-10
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Takabayashi, Shinichiro , Orihashi, Masayuki , Matsuoka, Akihiko
IPC分类号： H04L27/38
CPC分类号： H04L27/3809 , H04L27/3872
摘要： In-phase component approximation section 111 calculates an amplitude variation amount of an in-phase component of a data symbol from an amplitude variation amount of an in-phase component of a pilot symbol approximately. Quadrature component approximation section 112 calculates an amplitude variation amount of a quadrature component of the data symbol from an amplitude variation amount of a quadrature component of the pilot symbol approximately. Amplitude variation calculation section 113 calculates an amplitude variation amount of each data symbol from the amplitude variation amounts of the in-phase component and quadrature component of each data symbol. Phase variation calculation section 114 calculates a phase variation amount of the data symbol from a phase variation amount of the pilot symbol approximately. Thus, by calculating the amplitude variation amount of the data symbol and the phase variation amount of the data symbol separately, even in the case where a frequency offset between a transmitter and receiver is large, it is possible to estimate the frequency offset and fading distortion with high accuracy, and to suppress the deterioration of bit error rate characteristic.
摘要翻译：同相分量近似部111计算从大约到的导频符号的同相成分的振幅变化量的振幅A的数据码元的同相分量的变化量。正交分量近似部112计算从大约导频码元的正交分量的振幅变化量的振幅数据符号的正交分量的变化量。振幅变化计算部113计算从每个数据码元的同相分量和正交分量的振幅变化量振幅的每个数据符号的变化量。相位变化计算部114从大约所述导频符号的相位变化量计算所述数据符号的相位变化量。因此，通过计算数据符号的振幅变化量，并分别将数据码元的相位变化量，即使在频率发射机和接收机之间的偏移大的情况下，也能够估计频率偏移和衰落失真具有精度高，并且可以抑制位误码率特性的恶化。

8. 发明公开

EP1843506A2 Apparatus and method for digital wireless communications 有权
标题翻译： Vorrichtung und Verfahrenfürdrahtlose digitale Kommunikationen
公开(公告)号：EP1843506A2
公开(公告)日：2007-10-10
申请号：EP07014948.9
申请日：2000-01-17
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Takabayashi, Shinichiro , Orihashi, Masayuki , Matsuoka, Akihiko
IPC分类号： H04L7/04
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093
摘要： In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
摘要翻译：在每3个或更多符号插入一个导频符号的多值调制类型中，使用与导频符号不同的调制类型来调制紧接在导频符号之前和之后的每个符号的信号点。以这种方式，可以抑制通过导频符号估计基准相位和频率偏移量的精度的劣化，并且通过符号同步为符号的符号来提高准相干检测中的信噪比中的误码率特性不完全成立

9. 发明授权

EP1367794B1 Modulation method and radio communication system 有权
标题翻译：调制方法和无线通信系统
公开(公告)号：EP1367794B1
公开(公告)日：2007-03-14
申请号：EP03017277.9
申请日：1999-01-28
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Orihashi, Masayuki , Matsuoka, Akihiko , Sagawa, Morikazu
IPC分类号： H04L27/34
CPC分类号： H04L27/0008 , H04L25/0232 , H04L27/34

10. 发明公开

EP1075099A3 Apparatus for the transmission and reception of data and method for digital radio communication 有权
标题翻译：设备，用于发送和接收数据，并处理该数字无线电发射
公开(公告)号：EP1075099A3
公开(公告)日：2006-07-26
申请号：EP00116027.4
申请日：2000-07-26
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Murakami, Yutaka , Takabayashi, Shinichrio , Orihashi, Masayuki , Matsuoka, Akihiko
IPC分类号： H04H1/00 , H04L27/26
CPC分类号： H04L27/12 , H04B1/38 , H04L1/0003 , H04L1/0006 , H04L27/206 , H04L27/34 , H04L27/3455
摘要： Frame configuration determination section 101 judges a communication situation based on the transmission path information indicating the level of fluctuations of the transmission path due to fading and data transmission speed information indicating the transmission speed of the transmission data based on the level of the reception signal and determines the interval of inserting a known pilot symbol and the modulation system of a transmission digital signal. Quadrature baseband modulation section 102 modulates the transmission digital signal to a quadrature baseband signal according to the modulation system indicated from frame configuration determination section 101. Pilot symbol generation section 103 generates a pilot symbol known between the transmitting and receiving sides. Frame configuration section 104 inserts the known pilot symbol output from pilot symbol generation section 103 at the insertion interval instructed from frame configuration determination section 101 to configure a frame. This makes it possible to flexibly improve the data transmission efficiency and the quality of data at the same time.

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