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    • 3. 发明申请
    • METHOD AND APPARATUS OF SPACE-TIME-FREQUENCY CODING
    • 空时编码的方法与装置
    • WO2007141710A1
    • 2007-12-13
    • PCT/IB2007/052027
    • 2007-05-30
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.WU, GangZHOU, QiMA, NiZHANG, Xiaobo
    • WU, GangZHOU, QiMA, NiZHANG, Xiaobo
    • H04L1/06
    • H04L1/0662H04L1/0606H04L27/2601
    • The invention relates to a space-time-frequency encoding for use in wireless communication systems. According to the encoding scheme provided by the invention, it first transforms a plurality of input element pairs into a plurality orthogonal element pairs respectively, each of the plurality of input element pairs and corresponding orthogonal element pair forming an orthogonal matrix; and then maps the first element, second element and the redundancy of the second element in each of the plurality of input element pairs and corresponding orthogonal element pair as channel elements to three predetermined time-frequency cells in a first and second two-dimension time-frequency matrix so as to make the channel elements in the first and second matrixes suitable for being transmitted via different antennas. As the redundant input element pairs and corresponding orthogonal element pairs transmitted via different antenna are orthogonal in both space-time domain and space-frequency domain at the same time, and thus two-dimension space-time transmit diversity gain and space-frequency transmit diversity gain can be achieved at the same time.
    • 本发明涉及用于无线通信系统的时空编码。 根据本发明提供的编码方案,首先将多个输入元素对分别变换为多个正交元素对,分别形成多个输入元素对和对应的正交元素对,形成正交矩阵; 然后将第一元素,第二元素和多个输入元素对中的每一个中的第二元素的冗余和对应的正交元素对作为信道元素映射到第一和第二二维时间单元中的三个预定时间单元, 频率矩阵,以使第一和第二矩阵中的信道单元适合于经由不同的天线发送。 由于通过不同天线发送的冗余输入元件对和相应的正交元件对同时在空时域和空间频域两者都正交,因此二维空时发射分集增益和空间 - 频率发射分集 增益可以同时实现。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A DATA BLOCK IN A WIRELESS COMMUNICATION SYSTEM
    • 用于在无线通信系统中发送和接收数据块的方法和装置
    • WO2007099468A1
    • 2007-09-07
    • PCT/IB2007/050494
    • 2007-02-15
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.ZHANG, XiaoboZHOU, QiMA, NiTOLHUIZEN, Ludovicus Marinus Gerardus Maria
    • ZHANG, XiaoboZHOU, QiMA, NiTOLHUIZEN, Ludovicus Marinus Gerardus Maria
    • H04L1/18
    • H04L1/1819H04L1/0057H04L1/1607
    • The invention provides methods and apparatus for transmitting and receiving a source data block in a wireless communication system using hybrid automatic retransmission request protocol. According to the scheme provided by the invention, at transmitting side, the source data block or part of source data block that is not decoded correctly at receiving side is divided into a plurlaity of data segements, each the plurality of data segments may be paded with known data to expand the data segments to be a predetermined lengthen, the data segment is encoded with linear code to be a data packet including the data segment and a redundancy information segment or including only redundancy information, and after that the encoded data packets are transmitted. At the receiving side, when each of the received data packets includes a data segment and a redundancy information segment, decoding is performed directly based on the received data packet, decoding is performed based on the received reduandancy information segment and an data segment and redundancy information segment extracted from buffered data packets with a first and second chance to restore the data segment that is not decoded correctly in previous decoding processing. With the additional decoding chance, the scheme provided by the invention can improve decoding probability and thus the transmission efficiency of the system.
    • 本发明提供了使用混合自动重传请求协议在无线通信系统中发送和接收源数据块的方法和装置。 根据本发明提供的方案,在发送侧,源数据块或接收侧未被正确解码的源数据块的一部分被划分为多个数据段,每个数据段可以用 将数据段扩展为预定延长的已知数据,将数据段用线性码编码为包括数据段和冗余信息段的数据分组,或仅包括冗余信息,之后传送编码数据分组 。 在接收侧,当每个接收的数据分组包括数据段和冗余信息段时,基于接收的数据分组直接进行解码,基于接收到的减少信息段和数据段和冗余信息进行解码 从缓冲的数据分组提取的段具有第一和第二机会,以恢复在先前的解码处理中未正确解码的数据段。 利用附加的解码机会,本发明提供的方案可以提高系统的解码概率和传输效率。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR SYSTEM SYNCHRONIZATION IN WIRELESS COMMUNICATION SYSTEMS
    • 无线通信系统中系统同步的方法与装置
    • WO2007069203A2
    • 2007-06-21
    • PCT/IB2006/054791
    • 2006-12-13
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.ZHANG, XiaoboMA, NiZHOU, Qi
    • ZHANG, XiaoboMA, NiZHOU, Qi
    • H04L5/0048H04L5/0007H04L27/2613H04L27/2655H04L27/2675
    • The invention relates to system synchronization in an orthogonal frequency division multiplexing communication system having a plurality of sub-carriers. The transmission signal provided by the invention comprises a plurality of frequency-domain symbols. Each frequency-domain symbol comprises both pilot elements and data elements that are modulated on different sub-carriers. The pilot elements in the plurality of symbols compose at least two pilot matrixes that have predefined relationship in frequency domain. At transmitting side, the plurality of symbols is transformed from frequency domain to time domain via Inverse Discrete Fourier Transform. At receiving side, the sampled time- domain symbols are transformed to frequency-domain symbols via Discrete Fourier Transform and at least two pilot matrixes having predefined relationship in frequency domain are retrieved based on pilot elements extracted from the plurality of frequency- domain symbols. Then the system synchronization can be obtained based on correlation of any two of the pilot matrixes. As the pilot timeslot carries pilot information and data information, the invention can improve transmission efficiency.
    • 本发明涉及具有多个子载波的正交频分复用通信系统中的系统同步。 本发明提供的传输信号包括多个频域符号。 每个频域符号包括在不同子载波上调制的导频元素和数据元素。 多个符号中的导频元素构成在频域中具有预定关系的至少两个导频矩阵。 在发送侧,通过离散傅里叶逆变换将多个符号从频域变换为时域。 在接收侧,通过离散傅立叶变换将采样的时域符号变换成频域符号,并且基于从多个频域符号提取的导频元素来检索具有频域中具有预定关系的至少两个导频矩阵。 然后可以基于任何两个导频矩阵的相关性来获得系统同步。 由于导频时隙携带导频信息和数据信息,本发明可以提高传输效率。