公开(公告)号：US20110200129A1

公开(公告)日：2011-08-18

申请号：US12943515

申请日：2010-11-10

申请人： Sung-Hyun HWANG ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

发明人： Sung-Hyun HWANG ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

IPC分类号： H04J11/00

CPC分类号： H04L27/2633 ,  H04B7/0602 ,  H04B7/0669 ,  H04L1/0042 ,  H04L1/0625 ,  H04L1/0631 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2621 ,  H04L27/2647

摘要： Provided is a transmitter for transmitting an orthogonal frequency division multiplexing (OFDM) signal using multiple antennas, including: a subgroup generator to divide data symbols of a frequency domain into a plurality of subgroups; an inverse fast Fourier transform (IFFT) unit to perform an IFFT with respect to each of the subgroups so as to generate partial signals of a time domain corresponding to the plurality of subgroups, respectively; a candidate OFDM signal generator to generate at least two candidate OFDM signals using a combination of the partial signals so that each of the partial signals is transmitted to one of transmit antennas; and a selector to select one of the at least two candidate OFDM signals.

摘要翻译： 提供了一种用于使用多个天线发送正交频分复用（OFDM）信号的发射机，包括：子群发生器，用于将频域的数据符号划分为多个子群; 逆快速傅里叶变换（IFFT）单元，用于相对于每个子组执行IFFT，以便分别产生与多个子组相对应的时域的部分信号; 候选OFDM信号发生器，用于使用所述部分信号的组合来产生至少两个候选OFDM信号，使得每个所述部分信号被发送到发射天线之一; 以及选择器，用于选择所述至少两个候选OFDM信号中的一个。

公开(公告)号：US08693563B2

公开(公告)日：2014-04-08

申请号：US12943515

申请日：2010-11-10

申请人： Sung-Hyun Hwang ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

发明人： Sung-Hyun Hwang ,  Yun Hee Kim ,  Jin Soo Wang ,  Jae Cheol Park

IPC分类号： H04B7/06

CPC分类号： H04L27/2633 ,  H04B7/0602 ,  H04B7/0669 ,  H04L1/0042 ,  H04L1/0625 ,  H04L1/0631 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2621 ,  H04L27/2647

摘要： Provided is a transmitter for transmitting an orthogonal frequency division multiplexing (OFDM) signal using multiple antennas, including: a subgroup generator to divide data symbols of a frequency domain into a plurality of subgroups; an inverse fast Fourier transform (IFFT) unit to perform an IFFT with respect to each of the subgroups so as to generate partial signals of a time domain corresponding to the plurality of subgroups, respectively; a candidate OFDM signal generator to generate at least two candidate OFDM signals using a combination of the partial signals so that each of the partial signals is transmitted to one of transmit antennas; and a selector to select one of the at least two candidate OFDM signals.

摘要翻译： 提供了一种用于使用多个天线发送正交频分复用（OFDM）信号的发射机，包括：子群发生器，用于将频域的数据符号划分为多个子群; 逆快速傅里叶变换（IFFT）单元，用于相对于每个子组执行IFFT，以便分别产生与多个子组相对应的时域的部分信号; 候选OFDM信号发生器，用于使用所述部分信号的组合来产生至少两个候选OFDM信号，使得每个所述部分信号被发送到发射天线之一; 以及选择器，用于选择所述至少两个候选OFDM信号中的一个。

公开(公告)号：US08605610B2

公开(公告)日：2013-12-10

申请号：US12731370

申请日：2010-03-25

申请人： Sung-Hyun Hwang ,  Jin Soo Wang ,  Jae Chul Park ,  Yun Hee Kim

发明人： Sung-Hyun Hwang ,  Jin Soo Wang ,  Jae Chul Park ,  Yun Hee Kim

IPC分类号： H04L12/26 ,  H04H20/71 ,  H04W72/04

CPC分类号： H04L1/0028 ,  H04H20/42 ,  H04H20/71 ,  H04L1/0026 ,  H04L1/1607 ,  H04L25/0224 ,  H04L2001/0093

摘要： A method and apparatus for adaptively transmitting the same data, i.e., multicast/broadcast data, according to channel quality to a receiving group including one or more terminals that request the same service in a wireless network. A base station obtains feedback on channel quality indications (CQIs) from a plurality of terminals, selects a transmission technique that satisfies desired service quality based on the CQIs, and transmits data to the terminals included in a receiving group by using the selected transmission technique. The CQIs to be transmitted from the terminals in the receiving group to the base station are transmitted through a previously allocated common CQI feedback channel. In the present invention, in order to reduce a CQI feedback channel capacity, the base station does not allocate a common CQI feedback channel with respect to each reception terminal and allocates radio resources according to CQI levels. As radio resources are allocated according to CQI levels, a CQI feedback channel capacity may not be increased even when the number of terminals in the receiving group is increased and adaptive transmission may be efficiently performed.

摘要翻译： 一种用于根据信道质量将相同数据即组播/广播数据自适应发送到包括在无线网络中请求相同服务的一个或多个终端的接收组的方法和装置。 基站从多个终端获取对信道质量指示（CQI）的反馈，基于CQI选择满足期望的服务质量的传输技术，并且通过使用所选择的传输技术将数据发送到包括在接收组中的终端。 通过先前分配的公共CQI反馈信道来发送从接收组中的终端发送到基站的CQI。 在本发明中，为了降低CQI反馈信道容量，基站不对每个接收终端分配公共CQI反馈信道，根据CQI等级分配无线资源。 由于根据CQI等级分配无线资源，所以即使接收组中的终端数量增加，也可以有效地进行自适应传输，CQI反馈信道容量也不会增加。