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    • 5. 发明申请
    • RELAY SIGNAL PROCESSING IN WIRELESS COMMUNICATIONS
    • 无线通信中的继电信号处理
    • WO2011116831A1
    • 2011-09-29
    • PCT/EP2010/054002
    • 2010-03-26
    • NOKIA SIEMENS NETWORKS OYLI, WeiLILLEBERG, Jorma
    • LI, WeiLILLEBERG, Jorma
    • H04B7/155H04L1/00
    • H04B7/155H04L1/0041H04L1/0045H04L2001/0097
    • Relay Signal Processing in Wireless Communications. A method, an apparatus, and a computer program for transmission signal processing in a relay communication device are presented. The method comprises: acquiring a first soft estimate of a communication signal received in a relay communication device from a source communication device and a second estimate of the received communication signal, wherein the first soft estimate includes probability values for information elements comprised in the received communication signal; combining the first soft estimate and the second estimate when performing relay transmission signal processing in order to relay the received communication signal to a target communication device; and causing transmission of a relay communication signal to the target radio communication device.
    • 无线通信中的继电器信号处理。 提出了一种用于中继通信设备中的传输信号处理的方法,装置和计算机程序。 该方法包括:从源通信设备获取在中继通信设备中接收的通信信号的第一软估计和接收到的通信信号的第二估计,其中第一软估计包括包含在接收到的通信中的信息元素的概率值 信号; 在执行中继传输信号处理时组合第一软估计和第二估计,以将所接收的通信信号中继到目标通信装置; 并且使中继通信信号发送到目标无线电通信装置。
    • 7. 发明申请
    • OFDM TRANSCEIVER STRUCTURE WITH TIME-DOMAIN SCRAMBLING
    • 具有时域扫描的OFDM收发器结构
    • WO2005086446A1
    • 2005-09-15
    • PCT/IB2005/000038
    • 2005-01-11
    • NOKIA CORPORATIONNOKIA INC.WANG, HaifengLILLEBERG, Jorma
    • WANG, HaifengLILLEBERG, Jorma
    • H04L27/26
    • H04L27/2602H04L25/03866
    • A method and transceiver for wireless multicarrier communications. At the transmitter side, conventional OFDM symbols, after inverse fast Fourier Transform, are scrambled in time domain and then guard-interval (GI) inserted, up-converted at the carrier frequency for transmission. At the receiver side, after GI removal and frequency domain channel equalization, the received signal is transformed into time-domain by inverse fast Fourier Transform. The time-domain equalized signal is descrambled in time domain and then transformed back to the frequency domain before it is rate-matched, demodulated and decoded. This time-domain scrambling and descrambling method can be used in a wireless OFDM system such as WLAN, cellular OFDM, and MC-CDMA.
    • 一种用于无线多载波通信的方法和收发器。 在发射机侧,在快速傅里叶逆变换之后的常规OFDM符号在时域中被加扰,然后在载波频率上插入保护间隔(GI)进行上变频以进行传输。 在接收机侧,经GI去除和频域信道均衡后,接收信号通过快速傅里叶反变换变换为时域。 时域均衡信号在时域中被解扰,然后在速率匹配,解调和解码之前被转换回到频域。 该时域加扰和解扰方法可以用于诸如WLAN,蜂窝OFDM和MC-CDMA的无线OFDM系统中。
    • 8. 发明申请
    • MULTIPLE-ANTENNA PARTIALLY COHERENT CONSTELLATIONS FOR MULTI-CARRIER SYSTEMS
    • 多载波系统的多天线部分密切协商
    • WO2005043788A2
    • 2005-05-12
    • PCT/IB2004/003455
    • 2004-10-21
    • NOKIA CORPORATIONNOKIA, INC.BORRAN, Mohammed, J.VARSHNEY, PrabodhLILLEBERG, Jorma
    • BORRAN, Mohammed, J.VARSHNEY, PrabodhLILLEBERG, Jorma
    • H04L
    • H04L27/34H04L1/0625H04L1/0631H04L1/0656
    • A multi-level space time signal constellation that is optimized for use with a multi-carrier, multi-path communication scheme includes points on a first level separated from points on a mutually exclusive second level by a minimum distance that is based on a conditional probability distribution, preferably a Kullback-Leibler (KL) distance. Points within one level may be separated by a Euclidean distance, but spherical levels are rotated relative to one another to maximize a minimum inter-level KL distance. A receiver uses pilot symbols to estimate the channels and two-stage symbol detection, determining in one stage the constellation level and in another stage the point in the level. The receiver calculates a likelihood function based on a conditional distribution which does not reduce to the Euclidean-based nearest-neighbor detector. A single stored constellation may be scaled based on received signal to noise ratio. Each constellation defines n=2M real dimensions, wherein M is the number of transmit antennas.
    • 优化用于多载波多路径通信方案的多级时空信号星座包括在相互排斥的第二级别上的点之间的第一级上的点与基于条件概率的最小距离的点 分布,最好是Kullback-Leibler(KL)距离。 一个级别内的点可以通过欧几里德距离分开,但是球面水平相对于彼此旋转以使最小跨越距离KL距离最大化。 接收机使用导频符号来估计信道和两级符号检测,在一个阶段中确定星座级别,在另一级中确定该级别中的点。 接收机基于不减少到基于欧几里德的最近邻检测器的条件分布来计算似然函数。 可以基于接收到的信噪比来缩放单个存储的星座。 每个星座定义n = 2M个实际维度,其中M是发射天线的数量。