-
21.发明授权公开(公告)号：US07363007B2
公开(公告)日：2008-04-22
申请号：US10894062
申请日：2004-07-20
申请人： Seishi Hanaoka , Satoshi Tamaki , Takashi Yano
发明人： Seishi Hanaoka , Satoshi Tamaki , Takashi Yano
IPC分类号： H04B7/00
CPC分类号： H04L1/0036 , H04L1/0003 , H04L1/0032 , H04L1/0059 , H04L5/0046 , H04L27/0012
摘要： Adaptive modulation/demodulation method in a radio communication system is provided. A modulation multi-level number in a transmission device and a demodulation multi-level number in a reception device are judged independently from each other according to a propagation condition and communication is performed by controlling the likelihood when the multi-level numbers of the transmission side and the reception side are different. The reception device can perform operation by controlling likelihood information on lower bit of the multi-level modulation even when the modulation multi-level number and the demodulation multi-level number used at the transmission side are different. Moreover, the transmission device and the reception device independently decide the modulation multi-level number and the demodulation multi-level number, thereby following an instantaneous propagation fluctuation and improving the throughput.
摘要翻译： 提供了一种无线电通信系统中的自适应调制/解调方法。 根据传播条件，独立地判断发送装置中的发送装置中的调制多电平号码和接收装置中的解调多电平号码，并且通过控制发送侧的多电平号码的可能性来进行通信 接收端不同。 即使当在发送侧使用的调制多电平号码和解调多电平号码不同时，接收装置也可以通过控制多电平调制的较低位的似然信息来执行操作。 此外，发送装置和接收装置独立地决定调制多电平号码和解调多电平号码，从而跟随瞬时传播波动并提高吞吐量。
-
公开(公告)号：US20070104165A1
公开(公告)日：2007-05-10
申请号：US11501045
申请日：2006-08-09
申请人： Seishi Hanaoka , Takashi Yano , Satoshi Tamaki
发明人： Seishi Hanaoka , Takashi Yano , Satoshi Tamaki
IPC分类号： H04Q7/24
CPC分类号： H04W88/085 , H04B7/022 , H04B7/0417
摘要： A prior art MIMO technique assumes one-to-one communication in which a transmitter and a receiver exist and does not assume a cellular system in which plural access points and access terminals exist. When the prior art is applied to the cellular system, the characteristic can be deteriorated. MIMO signal processing is not performed in access points. Signal processing units in the access points are integrated into an access point controller controlling plural access points and the MIMO signal processing for plural access points is performed together.
摘要翻译： 现有技术的MIMO技术假设存在发射机和接收机的一对一通信，并且不假定存在多个接入点和接入终端的蜂窝系统。 当将现有技术应用于蜂窝系统时，可能劣化特性。 在接入点不执行MIMO信号处理。 接入点中的信号处理单元被集成到控制多个接入点的接入点控制器中，并且一起执行多个接入点的MIMO信号处理。
-
公开(公告)号：US07277498B2
公开(公告)日：2007-10-02
申请号：US10206034
申请日：2002-07-29
申请人： Seishi Hanaoka , Takashi Yano
发明人： Seishi Hanaoka , Takashi Yano
CPC分类号： H04L1/0066 , H04L1/0003 , H04L1/0009 , H04L1/0016 , H04L1/0042 , H04L1/0047 , H04L1/0067 , H04L1/0071 , H04L27/3416
摘要： In the code word mapping operation of a radio communication system, mapping patterns are provided for different S/N ratios, the code word bits produced from a coder are not equally assigned to multi-level modulation bits, but weighted according to the resistance of multi-level modulation bits to error before being assigned, and the mapping patterns are switched in accordance with S/N. Since the code word mapping method is updated so that the error rate can be always minimized according to the situations of a propagation path and S/N ratio, communication can be made with high communication quality.
摘要翻译： 在无线电通信系统的码字映射操作中，为不同的S / N比率提供映射模式，从编码器产生的码字比特不被均等地分配给多电平调制比特，而是根据多电平 在分配之前发生错误的级别调制比特，并且根据S / N切换映射模式。 由于代码字映射方法被更新，从而可以根据传播路径和S / N比的情况总是最小化错误率，可以以高通信质量进行通信。
-
公开(公告)号：US07158770B2
公开(公告)日：2007-01-02
申请号：US10600652
申请日：2003-06-23
申请人： Seishi Hanaoka , Takashi Yano
发明人： Seishi Hanaoka , Takashi Yano
CPC分类号： H04L25/0232
摘要： Under present circumstances, where an increasing number of wireless communication systems employ the QAM method as a modulation method for frequency use efficiency enhancement as the speed of information transmission in the wireless communication systems increases, it is an object of the present invention to provide a channel estimation method for estimating a channel efficiently and accurately and establishing communication at high quality, that is, providing communication with excellent error rate characteristics. To achieve the above object, the present invention improves characteristics by calculating the channel estimation results variously for all data signal symbols and using them for demodulation. To accomplish the object, the present invention also pays attention to the frequency characteristics of fading in a radio propagation path and enhances the accuracy in channel estimation result calculation by using a band pass filter for eliminating the thermal noise that would increase the estimation error.
摘要翻译： 在目前情况下，随着无线通信系统中的信息传输速度的增加，越来越多的无线通信系统采用QAM方法作为频率利用效率提高的调制方法，本发明的一个目的是提供一种信道 用于高效准确地估计信道的估计方法，以及高质量的建立通信，即提供优异的差错率特性的通信。 为了实现上述目的，本发明通过对各种数据信号符号进行各种信道估计结果的计算，并将其用于解调来提高特性。 为了实现该目的，本发明还关注无线电传播路径中的衰落的频率特性，并且通过使用带通滤波器来提高信道估计结果计算的精度，以消除将增加估计误差的热噪声。
-
公开(公告)号：US07889758B2
公开(公告)日：2011-02-15
申请号：US11209739
申请日：2005-08-24
申请人： Lei Li , Zhisheng Niu , Takashi Yano , Shiro Tanabe , Satoshi Tamaki
发明人： Lei Li , Zhisheng Niu , Takashi Yano , Shiro Tanabe , Satoshi Tamaki
CPC分类号： H04B7/0417 , H04B7/0452 , H04B7/0626 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/06 , H04L5/0023 , H04L5/0037 , H04L5/0046 , H04L5/0051 , H04L5/006 , H04L5/0075 , H04L5/0094 , H04L25/0204 , H04L25/0228 , H04L27/0008 , H04L27/0012 , H04W72/044 , H04W72/048
摘要： A subchannel scheduling method in a multi-user MIMO-OFDM environment modifies proportional fairness scheduling specifications and maximizes a system throughput under conditions that a minimum data transmission rate required by a multimedia user be ensured. In a method for allocating subchannels in a wireless network, plural users are subscribed in the wireless network, a base station has NT transmission antennas, a user i has NR reception antennas, a network capacity determined by the NT transmission antennas and K subcarrier groups is divided into K transmission subchannel groups, and a network bandwidth determined by the NT transmission antennas is divided into the K subchannel groups. The base station sequentially allocates channels to the users on the basis of a proportional value of a data transmission rate supported to each user and an average throughput of each user in a predetermined time and a service quality required by each user.
摘要翻译： 在多用户MIMO-OFDM环境中的子信道调度方法修改比例公平调度规范，并在确保多媒体用户所要求的最小数据传输速率的条件下最大化系统吞吐量。 在无线网络中分配子信道的方法中，在无线网络中订阅多个用户，基站具有NT个发送天线，用户i具有NR个接收天线，由NT个发送天线确定的网络容量，K个子载波组为 划分为K个传输子信道组，由NT个发送天线确定的网络带宽分为K个子信道组。 基站根据每个用户支持的数据传输速率的比例值和每个用户在预定时间内的平均吞吐量以及每个用户所需的服务质量，顺序地向用户分配信道。
-
26.发明授权公开(公告)号：US07769081B2
公开(公告)日：2010-08-03
申请号：US11896082
申请日：2007-08-30
申请人： Takashi Yano , Satoshi Tamaki
发明人： Takashi Yano , Satoshi Tamaki
CPC分类号： H04W52/243 , H04W52/242 , H04W52/247 , H04W52/50
摘要： Transmission power relative to a propagation path having a variation in gain is controlled to increase communication channel capacity, and a data rate is controlled in accordance with the variation of the increased communication channel capacity. In order to increase the communication channel capacity, the transmission power is determined so that the sum of noise power (=received noise power/propagation path gain) converted into one at a transmitter and the transmission power becomes constant. As a result, contrary to the background art, the transmission power is controlled to be reduced when the propagation path gain decreases and to be increased when the propagation path gain increases.
摘要翻译： 控制相对于具有增益变化的传播路径的传输功率以增加通信信道容量，并且根据增加的通信信道容量的变化来控制数据速率。 为了增加通信信道容量，确定发送功率，使得在发射机处转换为一个的发送功率和发送功率的噪声功率（=接收噪声功率/传播路径增益）之和变得恒定。 结果，与背景技术相反，当传播路径增益减小时，传输功率被控制为减小，并且当传播路径增益增加时传输功率被增加。
-
公开(公告)号：US20050143092A1
公开(公告)日：2005-06-30
申请号：US11017135
申请日：2004-12-21
申请人： Tsuyoshi Tamaki , Takashi Yano , Satoshi Tamaki , Ryouichi Tanaka
发明人： Tsuyoshi Tamaki , Takashi Yano , Satoshi Tamaki , Ryouichi Tanaka
CPC分类号： H04W64/00
摘要： To provide a positioning system, a positioning method, and a positioning server, which are capable of improving accuracy in detection of a position. In a positioning system, three or more access points connected to a terminal station by wireless communication are connected to a positioning server through a network, the access points transmit, to the positioning server, information regarding times of having received a signal transmitted from any one of the access points or the terminal station, and the positioning server measures a position of the terminal station based on the information regarding the times, the information having been received from the access points. In the positioning system, the access points select a communication method for maximizing a strength of the signal received from the terminal station and receive the signal from the terminal station, and the positioning server measures the position of the terminal station based on the information regarding the times, the information having been received from the access points.
摘要翻译： 提供能够提高位置检测精度的定位系统，定位方法和定位服务器。 在定位系统中，通过无线通信连接到终端站的三个或更多个接入点通过网络连接到定位服务器，接入点向定位服务器发送关于接收到从任何一个发送的信号的时间的信息 的接入点或终端站，并且定位服务器根据关于时间的信息来测量终端站的位置，该信息已从接入点接收。 在定位系统中，接入点选择用于使从终端接收的信号的强度最大化并从终端接收信号的通信方法，并且定位服务器基于关于终端的信息来测量终端的位置 时间，从接入点接收到的信息。
-
28.发明授权Transmitting device, receiving device, and signal processing method in radio communication system 有权无线电通信系统中的发射设备，接收设备和信号处理方法公开(公告)号：US08355456B2
公开(公告)日：2013-01-15
申请号：US12836149
申请日：2010-07-14
申请人： Satoshi Tamaki , Takashi Yano , Koki Uwano
发明人： Satoshi Tamaki , Takashi Yano , Koki Uwano
IPC分类号： H04K1/10
CPC分类号： H04L27/2626 , H04L25/03828 , H04L27/2647 , H04L27/2665
摘要： A signal frequency of an interface signal between a baseband unit and a remote radio unit is decreased by downsampling, and the strain of the signal caused by downsampling is compensated for each subcarrier before an IFFT during transmission, and after FFT during reception.
摘要翻译： 通过下采样来降低基带单元和远程无线单元之间的接口信号的信号频率，并且在发送期间的IFFT之前和接收期间的FFT之后，针对每个子载波对由下采样引起的信号的应变进行补偿。
-
公开(公告)号：US20100255872A1
公开(公告)日：2010-10-07
申请号：US12820555
申请日：2010-06-22
申请人： Takashi Yano , Satoshi Tamaki
发明人： Takashi Yano , Satoshi Tamaki
IPC分类号： H04W52/04
CPC分类号： H04W52/243 , H04W52/242 , H04W52/247 , H04W52/50
摘要： Transmission power relative to a propagation path having a variation in gain is controlled to increase communication channel capacity, and a data rate is controlled in accordance with the variation of the increased communication channel capacity. In order to increase the communication channel capacity, the transmission power is determined so that the sum of noise power (=received noise power/propagation path gain) converted into one at a transmitter and the transmission power becomes constant. As a result, contrary to the background art, the transmission power is controlled to be reduced when the propagation path gain decreases and to be increased when the propagation path gain increases.
摘要翻译： 控制相对于具有增益变化的传播路径的传输功率以增加通信信道容量，并且根据增加的通信信道容量的变化来控制数据速率。 为了增加通信信道容量，确定发送功率，使得在发射机处转换为一个的发送功率和发送功率的噪声功率（=接收噪声功率/传播路径增益）之和变得恒定。 结果，与背景技术相反，当传播路径增益减小时，传输功率被控制为减小，并且当传播路径增益增加时传输功率被增加。
-
公开(公告)号：US20080014980A1
公开(公告)日：2008-01-17
申请号：US11896082
申请日：2007-08-30
申请人： Takashi Yano , Satoshi Tamaki
发明人： Takashi Yano , Satoshi Tamaki
IPC分类号： H04Q7/20
CPC分类号： H04W52/243 , H04W52/242 , H04W52/247 , H04W52/50
摘要： Transmission power relative to a propagation path having a variation in gain is controlled to increase communication channel capacity, and a data rate is controlled in accordance with the variation of the increased communication channel capacity. In order to increase the communication channel capacity, the transmission power is determined so that the sum of noise power (=received noise power/propagation path gain) converted into one at a transmitter and the transmission power becomes constant. As a result, contrary to the background art, the transmission power is controlled to be reduced when the propagation path gain decreases and to be increased when the propagation path gain increases.
-
-
-
-
-
-
-
-
-
搜索结果
312 条记录 (耗时 0.026 秒)
