公开(公告)号：US20100027695A1

公开(公告)日：2010-02-04

申请号：US12310037

申请日：2006-11-24

申请人： Fajun Yan ,  Tao Tao ,  Wen Chen ,  Qihong Ge ,  Dong Bai ,  Qinghua Yang

发明人： Fajun Yan ,  Tao Tao ,  Wen Chen ,  Qihong Ge ,  Dong Bai ,  Qinghua Yang

IPC分类号： H04L27/28

CPC分类号： H04L5/0094 ,  H04L5/0007

摘要： A method for transmitting control information to indicate a receiver, comprising following steps: the control information is formed at transmitting side and is encoded based on the working status of the transmitting side of the system; after the encoded control information is mapped, it is multiplexed with other pilot symbol and service load, then an OFDM symbol is generated; the OFDM symbol is transformed from frequency domain to time domain, then a time domain sampling signal is obtained and transmitted to the receiving side of the system; at the receiving side, the time domain sampling signal transmitted by the transmitting side is received and transformed from time domain to frequency domain to form OFDM symbol; the control information is obtained from the valid sub carrier of the OFDM symbol, and the control information is decoded; each work information is extracted form the decoded control information, and the receiving terminal is indicated to execute respective receive process based on the extracted work information. The method can ensure the receiving terminal to receive data based on its own expectation, then reduces the work power consumption of the receiving terminal, and saves the run cost of the digital broadcast system.

摘要翻译： 一种用于发送控制信息以指示接收机的方法，包括以下步骤：控制信息形成在发送侧，并根据系统的发送侧的工作状态进行编码; 编码控制信息映射后，与其他导频符号和业务负载进行复用，生成OFDM符号; OFDM符号从频域变换为时域，得到时域采样信号并将其发送到系统的接收端; 在接收侧，从发送侧发送的时域采样信号从时域到频域被接收并变换为OFDM符号; 从OFDM符号的有效子载波获得控制信息，对该控制信息进行解码; 从解码控制信息中提取每个工作信息，并且基于所提取的工作信息指示接收终端执行相应的接收处理。 该方法可以确保接收终端根据自己的期望接收数据，降低接收终端的工作功耗，节省数字广播系统的运行成本。

公开(公告)号：US20110268206A1

公开(公告)日：2011-11-03

申请号：US13143664

申请日：2009-12-30

申请人： Qihong Ge ,  Junwei Wang ,  Binbin Liu ,  Dong Bai ,  Tao Tao

发明人： Qihong Ge ,  Junwei Wang ,  Binbin Liu ,  Dong Bai ,  Tao Tao

IPC分类号： H04L27/28

CPC分类号： H04L27/2601 ,  H04L5/00 ,  H04L25/023

摘要： The present invention relates to the field of communication technology. A channel estimation device for an Orthogonal Frequency Division Multiplexing (OFDM) system is provided for performing channel estimation on data based on synchronization signal and pilot, which comprises: a synchronization signal based initial channel estimation module for performing initial channel estimation based on a synchronization signal in the data; a pilot channel tracking module for performing pilot channel tracking on the result of the initial channel estimation; a noise reduction module for performing noise reduction on the result of the pilot channel tracking; and an effective sub-carrier extraction module for extracting channel estimation values of effective sub-carriers from the result of the noise reduction. With the channel estimation method and device for OFDM system according to the present invention, the channel estimation is carried out jointly based on the synchronization signal and the pilot, such that the accuracy of channel estimation can be significantly improved and the performance requirements of the system can be satisfied without increasing the density of pilots and thus reducing the amount of system payload. Moreover, the synchronization signal can still be used for its original purpose of carrier and timing synchronization.

摘要翻译： 本发明涉及通信技术领域。 提供了一种用于正交频分复用（OFDM）系统的信道估计装置，用于基于同步信号和导频对数据执行信道估计，其包括：基于同步信号的初始信道估计模块，用于基于同步信号执行初始信道估计 在数据中; 导频信道跟踪模块，用于对初始信道估计的结果执行导频信道跟踪; 噪声降低模块，用于对导频信道跟踪的结果进行降噪; 以及有效子载波提取模块，用于从降噪的结果中提取有效子载波的信道估计值。 利用根据本发明的OFDM系统的信道估计方法和装置，基于同步信号和导频共同进行信道估计，从​​而可以显着提高信道估计的精度和系统的性能要求 可以在不增加导频密度的情况下得到满足，从而减少系统有效载荷的数量。 此外，同步信号仍然可以用于载波和定时同步的原始目的。

公开(公告)号：US20090097396A1

公开(公告)日：2009-04-16

申请号：US12298679

申请日：2006-11-14

申请人： Guanbin Xing ,  Dong Bai ,  Yibin Liang ,  Qihong Ge ,  Wen Chen

发明人： Guanbin Xing ,  Dong Bai ,  Yibin Liang ,  Qihong Ge ,  Wen Chen

IPC分类号： H04J11/00

CPC分类号： H04L25/067 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613

摘要： The present invention provides a method for transmitting/receiving a continuous pilot code in a multi-carrier system. The method for transmitting comprises: performing a time-frequency domain two dimensional encoding on an information bit stream to be transmitted; mapping the encoded bit stream to obtain a continuous pilot carrying encoding information; multiplexing a load, a discrete pilot and the mapped continuous pilot carrying the encoding information based on distribution of the load, the discrete pilot and the continuous pilot on a sub-carrier, to generate a frequency domain signal; and performing a frequency-time domain transforming on the generated frequency domain signal, to obtain a time domain sample. The method for receiving comprises: extracting the continuous pilot from an active carrier of a multi-carrier signal; and performing a time-frequency domain decoding on the extracted continuous pilots to obtain the decision of transmitted information bits. The invention ensures reliable transmission of the information without using additional bandwidth resource by carrying information in the continuous pilots using an encoding scheme.

摘要翻译： 本发明提供一种在多载波系统中发送/接收连续导频码的方法。 发送方法包括：对要发送的信息比特流执行时间 - 频域二维编码; 映射编码比特流以获得携带编码信息的连续导频; 基于负载分布，离散导频和子载波上的连续导频来复用负载，离散导频和携带编码信息的映射连续导频，以产生频域信号; 并对所生成的频域信号进行频域变换，得到时域采样。 所述接收方法包括：从多载波信号的有效载波中提取所述连续导频; 并对所提取的连续导频执行时频域解码以获得所发送的信息比特的决定。 本发明通过使用编码方案在连续导频中携带信息来确保信息的可靠传输，而不需要使用额外的带宽资源。

公开(公告)号：US08351323B2

公开(公告)日：2013-01-08

申请号：US12298679

申请日：2006-11-14

申请人： Guanbin Xing ,  Dong Bai ,  Yibin Liang ,  Qihong Ge ,  Wen Chen

发明人： Guanbin Xing ,  Dong Bai ,  Yibin Liang ,  Qihong Ge ,  Wen Chen

IPC分类号： H04J11/00

CPC分类号： H04L25/067 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613

摘要： The present invention provides a method for transmitting/receiving a continuous pilot code in a multi-carrier system. The method for transmitting comprises: performing a time-frequency domain two dimensional encoding on an information bit stream to be transmitted; mapping the encoded bit stream to obtain a continuous pilot carrying encoding information; multiplexing a load, a discrete pilot and the mapped continuous pilot carrying the encoding information based on distribution of the load, the discrete pilot and the continuous pilot on a sub-carrier, to generate a frequency domain signal; and performing a frequency-time domain transforming on the generated frequency domain signal, to obtain a time domain sample. The method for receiving comprises: extracting the continuous pilot from an active carrier of a multi-carrier signal; and performing a time-frequency domain decoding on the extracted continuous pilots to obtain the decision of transmitted information bits. The invention ensures reliable transmission of the information without using additional bandwidth resource by carrying information in the continuous pilots using an encoding scheme.

摘要翻译： 本发明提供一种在多载波系统中发送/接收连续导频码的方法。 发送方法包括：对要发送的信息比特流执行时间 - 频域二维编码; 映射编码比特流以获得携带编码信息的连续导频; 基于负载分布，离散导频和子载波上的连续导频来复用负载，离散导频和携带编码信息的映射连续导频，以产生频域信号; 并对所生成的频域信号进行频域变换，得到时域采样。 所述接收方法包括：从多载波信号的有效载波中提取所述连续导频; 并对所提取的连续导频执行时频域解码以获得所发送的信息比特的决定。 本发明通过使用编码方案在连续导频中携带信息来确保信息的可靠传输，而不需要使用额外的带宽资源。