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    • 7. 发明授权
    • Diversity transmitter-receiver in CDMA system using space-time code, and method thereof
    • 使用时空码的CDMA系统中的分集发射机 - 接收机及其方法
    • US07769077B2
    • 2010-08-03
    • US10593011
    • 2004-12-21
    • Dong-Woon BaiWoo-Yong LeeHyun-Seo Oh
    • Dong-Woon BaiWoo-Yong LeeHyun-Seo Oh
    • H04B1/00
    • H04L1/065H04B1/707H04B7/02
    • A diversity transmitting/receiving apparatus and method is provided, which is implemented using space-time trellis codes (STTC) constructed from a Pseudo Noise (PN) sequence set in a Direct Sequence (DS) CDMA system. The transmitter comprises a PN sequence generator, a space-time encoder, first and second modulators, and first and second multiple transmit antennas. The space-time encoder selects two of the multiple PN sequences to construct STTC, and space-time encodes data from a data source according to the STTC to output an Wary data symbol. The two modulators modulate the space-time encoded data according to the STTC. The two multiple transmit antennas wirelessly transmit outputs of the two modulators, respectively. By applying a method using space-time coding in a DS CDMA system including multiple transmit antennas, it is possible to achieve both diversity and additional coding gain and also to reduce multiple user interference by increasing the PN sequence length.
    • 提供了一种分集发送/接收装置和方法,其使用由在直接序列(DS)CDMA系统中设置的伪噪声(PN)序列构成的空时网格码(STTC)来实现。 发射机包括PN序列发生器,时空编码器,第一和第二调制器以及第一和第二多个发射天线。 空时编码器选择多个PN序列中的两个构造STTC,并且根据STTC对来自数据源的数据进行空时编码以输出谨慎数据符号。 两个调制器根据STTC调制空间编码数据。 两个多个发射天线分别无线地传输两个调制器的输出。 通过在包括多个发射天线的DS CDMA系统中应用使用空时编码的方法,可以实现分集和附加编码增益两者,并且还可以通过增加PN序列长度来减少多个用户干扰。
    • 9. 发明授权
    • Method and apparatus of the variable points IFFT/FFT
    • 可变点IFFT / FFT的方法和装置
    • US07626923B2
    • 2009-12-01
    • US11681201
    • 2007-03-02
    • Hyun-Seo OhHyoung-Goo JeonHyun LeeWon-Chul Choi
    • Hyun-Seo OhHyoung-Goo JeonHyun LeeWon-Chul Choi
    • H04J11/00
    • G06F17/142H04L27/2628H04L27/265
    • Provided are a method and apparatus for performing a variable point Inverse Fast Fourier Transform (IFFT)/Fast Fourier Transform (FFT). The apparatus for performing a variable point IFFT includes: an IFFT interpolator generating interpolation data signals having a determined point and interpolating a plurality of interpolation data, the number of which depends on an IFFT operation mode signal into input data; an IFFT operator generating IFFT operation data signals by performing an IFFT operation for the interpolated data signals; an IFFT mode selector selecting and outputting some of the IFFT operation data signals in response to the IFFT operation mode signal so that the selected IFFT operation data have the same number of points as the input data; and a control unit outputting the IFFT operation. Therefore, it is possible to easily compute variably sized IFFT/FFT hardware.
    • 提供了一种用于执行可变点快速傅立叶逆变换(IFFT)/快速傅里叶变换(FFT)的方法和装置。 用于执行可变点IFFT的装置包括:IFFT内插器,产生具有确定点并插入多个内插数据的插值数据信号,其数量取决于IFFT操作模式信号为输入数据; IFFT操作者通过对内插的数据信号执行IFFT操作来产生IFFT操作数据信号; IFFT模式选择器响应于IFFT操作模式信号来选择和输出一些IFFT操作数据信号,使得所选择的IFFT操作数据具有与输入数据相同的点数; 以及输出IFFT操作的控制单元。 因此,可以容易地计算可变大小的IFFT / FFT硬件。
    • 10. 发明申请
    • Base station and mobile terminal for location detection, and location detecting method
    • 用于位置检测的基站和移动终端,以及位置检测方法
    • US20070188382A1
    • 2007-08-16
    • US11732789
    • 2007-04-03
    • Chang-Sub ShinHyun-Seo OhHyun Lee
    • Chang-Sub ShinHyun-Seo OhHyun Lee
    • G01S1/08
    • G01S5/0263G01S1/08
    • Disclosed are a base station and a mobile terminal for location detection, and a location detecting method. The base station in which a plurality of antennas having RF modules are installed transmits a signal including location information of each of the antennas to the mobile terminal. The mobile terminal carries out location detection by selectively using location information received from a GPS receiver or location information received from a DSRC transceiver. The base station and mobile terminal for location detection can perform location detection with high accuracy using the existing DSRC service. Thus, the base station and mobile terminal can carry out location detection having an error of approximately 10 m in downtown areas or buildings.
    • 公开了一种用于位置检测的基站和移动终端,以及位置检测方法。 其中安装有多个具有RF模块的天线的基站将包括每个天线的位置信息的信号发送到移动终端。 移动终端通过选择性地使用从GPS接收机接收的位置信息或从DSRC收发器接收的位置信息来执行位置检测。 用于位置检测的基站和移动终端可以使用现有的DSRC服务以高精度执行位置检测。 因此,基站和移动终端可以在市区或建筑物中进行大约10m的误差的位置检测。