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    • 2. 发明申请
    • METHOD AND DEVICE OF TRANSMITTING AN OFDM SIGNAL
    • 发送OFDM信号的方法和设备
    • WO2009044176A8
    • 2009-07-09
    • PCT/GB2008003386
    • 2008-10-06
    • ISIS INNOVATIONS LTDNYIRONGO NYEMBEZIMALIK WASIM QAMAREDWARDS DAVID JOHN
    • NYIRONGO NYEMBEZIMALIK WASIM QAMAREDWARDS DAVID JOHN
    • H04L27/26
    • H04L27/2605
    • A method of transmitting a number of parallel sequences of original data symbols includes modulating the parallel sequences on to respective orthogonal sub-carriers by applying a discrete inverse transform to each original data symbol to obtain a corresponding number of parallel symbol sequences, each symbol (14, 16) having a length corresponding to a number of samples in an original data symbol. The method further includes generating one of a corresponding number of parallel signals from each symbol sequence, each of the parallel signals being partitioned into symbol periods (?T1-AT4 ) of a generally equal length corresponding to at least the length of one symbol (14, 16). At least one symbol period [?T2, ?T4) consisting of at least part of a padding sequence (15,17) is included adjacent a symbol period [?T1, ?T3) including one of the symbols (14, 16) in at least one of the parallel signals.
    • 发送原始数据符号的多个并行序列的方法包括通过对每个原始数据符号应用离散逆变换来将并行序列调制到各个正交子载波上,以获得相应数量的并行符号序列,每个符号(14 ,16)具有对应于原始数据符号中的样本数量的长度。 该方法还包括从每个符号序列生成相应数量的并行信号中的每一个,每个并行信号被划分为对应于至少一个符号(14)的长度的大致相等长度的符号周期(ΔT1-AT4) ,16)。 由填充序列(15,17)的至少一部分组成的至少一个符号周期[ΔT2,ΔT4]被包括在包括符号周期[ΔT1,ΔT3]中的符号周期[ΔT1,ΔT3]中,其中包括符号(14,16) 至少一个并行信号。
    • 3. 发明申请
    • METHOD AND SYSTEM FOR SELECTING ANTENNAS FOR COMMUNICATION BETWEEN A RECEIVER SIDE AND A TRANSMITTER SIDE OF A WIRELESS MIMO SYSTEM
    • 用于选择用于无线MIMO系统的接收器侧和发射器侧之间的通信的天线的方法和系统
    • WO2009053684A3
    • 2009-10-15
    • PCT/GB2008003565
    • 2008-10-21
    • ISIS INNOVATIONZHANG YANGYANGMALIK WASIM QAMARJI CHUNLINEDWARDS DAVID JOHNO'BRIEN DOMINIC CHRISTOPHER
    • ZHANG YANGYANGMALIK WASIM QAMARJI CHUNLINEDWARDS DAVID JOHNO'BRIEN DOMINIC CHRISTOPHER
    • H04B7/06H04B7/04H04B7/08
    • H04B7/0417H04B7/0691H04B7/0874
    • A method of selecting antennas (6, 10; 32, 48-50) for communication between the receiver side and the transmitter side of a wireless MIMO system includes obtaining channel state information representative of channel transfer functions between combinations of transmitter and receiver antennas, and performing at least once an iterative algorithm for calculating an optimised parameter vector for a family of parameterised discrete probability density functions giving a higher probability to states representing a selection of antennas giving a more desirable value of a target function based on the channel state information and an optimised value of the target function calculated for at least one sample state drawn at least in part according to the probability density function obtained using the current parameter vector. At least a final performance of the iterative algorithm uses selections of both a number Nr of receiver antennas (10; 32) and a number N, of transmitter antennas (6; 48-50) to calculate values of the target function, so as to arrive at a selection of both a sub-set of all available transmitter antennas (6; 48-50) and a sub-set of all available receiver antennas (10; 32).
    • 选择用于无线MIMO系统的接收机侧和发射机侧之间的通信的天线(6,10; 32,48-50)的方法包括获得表示发射机和接收机天线的组合之间的信道传递函数的信道状态信息,以及 至少执行一次用于计算参数化离散概率密度函数族的优化参数向量的迭代算法,所述参数化离散概率密度函数族给出表示天线选择的状态的较高概率,所述状态选择基于信道状态信息给出目标函数的更期望的值,以及 针对至少一个根据使用当前参数向量获得的概率密度函数绘制的至少一个样本状态计算的目标函数的优化值。 迭代算法的至少最终性能使用选择N r个接收器天线(10; 32)和N个发射器天线(6; 48-50)两者来计算目标函数的值,以便 到达选择所有可用发射机天线(6; 48-50)的子集和所有可用接收机天线(10; 32)的子集。