-
公开(公告)号：EP0721264B1
公开(公告)日：2003-11-26
申请号：EP95921994.0
申请日：1995-06-20
发明人： MIKI, Yoshinori , SAWAHASHI, Mamoru
CPC分类号： H04B1/7105 , H04J13/10 , H04J13/16
-
-
公开(公告)号：EP0776105A1
公开(公告)日：1997-05-28
申请号：EP96917644.5
申请日：1996-06-12
IPC分类号： H04J13/04
CPC分类号： H04B1/71075 , H04B2001/71077 , H04W52/12
摘要： A CDMA demodulator which is improved in interference canceling effect even when signals are sent from many communicators. The demodulator receives signals sent from a plurality of communicators and having a frame structure in which a pilot signal having a known pattern is inserted between information signals at regular time intervals. The demodulator includes interference cancellers which demodulate the data transmitted from the communicators, and estimate interference signals. The demodulator estimates the variation of each path of the channels, performs the demodulation of received data, and estimates the interference signal replica. The errors of the interference signal replica decrease as the data pass the interference cancellers, producing a marked interference canceling effect. When the interference cancellation is executed after detecting the reception level of each channel from the total sum of the received electric power of the paths of the channels and determining the ranks of the channels in order of reception level, a further marked interference canceling effect is exhibited.
摘要翻译： 一种CDMA解调器，其即使在从许多通信器发送信号时也能够改善干扰消除效果。 解调器接收从多个通信器发送的信号，并具有帧结构，其中具有已知模式的导频信号以规则的时间间隔插入在信息信号之间。 解调器包括解调从通信器发送的数据并估计干扰信号的干扰消除器。 解调器估计信道的每个路径的变化，执行接收数据的解调，并估计干扰信号副本。 随着数据通过干扰消除器，干扰信号副本的误差减小，产生明显的干扰消除效应。 在从通道的接收电力的总和中检测到每个信道的接收电平并且按照接收电平的顺序确定信道的秩之后执行干扰消除时，进一步显示干扰消除效果 。
-
公开(公告)号：EP0806844A1
公开(公告)日：1997-11-12
申请号：EP96940143.9
申请日：1996-11-28
CPC分类号： H04B1/709 , H04B1/707 , H04B1/712 , H04B7/0851 , H04B7/0857 , H04B7/086 , H04L1/02 , H04L1/06
摘要： A weight coefficient is feedback-controlled so as to maximize the ratio of desired signal power to interference power (SIR), whereby it is possible to improve reception quality and to increase the number of subscribers per cell and it is also possible to increase the speed of establishment of diffused code synchronization and the speed of convergence of the weight coefficient. A coherence adaptive diversity arrangement to which absolute synchronization detection is applicable is adopted. The weighht coefficient of each diversity branch is adaptively feedback-controlled, whereby it is possible to reduce the influence of interference power from other communicators, so that the number of subscribers per cell can be increased. Furthermore, a direction in which a highest reception SIR is obtainable is determined by rotating an antenna with directivity of predetermined angle being given to it. After that, by setting the initial value of the weight coefficient to the direction, the speed of convergence of the weight coefficient can be increased.
摘要翻译： 加权系数被反馈控制，以便最大化期望的信号功率与干扰功率（SIR）的比率，由此可以提高接收质量并增加每个小区的用户数量，并且还可以增加速度 建立扩散码同步和权重系数收敛速度。 采用绝对同步检测适用的相干自适应分集方案。 每个分集支路的权重系数被自适应反馈控制，从而可以减少来自其他通信器的干扰功率的影响，从而可以增加每个小区的用户数量。 此外，通过旋转具有预定角度的方向性的天线来确定可获得最高接收SIR的方向。 之后，通过将权重系数的初始值设定为方向，可以提高权重系数的收敛速度。
-
5.发明公开METHOD AND DEVICE FOR RECEIVING CODE-DIVISION MULTIPLEX SIGNAL 失效VERFAHREN UND ANORDNUNG ZUM EMPFENEN EINES CODE-DIVISION-MULTIPLEXSIGNALS
公开(公告)号：EP0721264A1
公开(公告)日：1996-07-10
申请号：EP95921994.0
申请日：1995-06-20
发明人： MIKI, Yoshinori , SAWAHASHI, Mamoru
IPC分类号： H04J13/02
CPC分类号： H04B1/7105 , H04J13/10 , H04J13/16
摘要： Each of receiving spreaded signals from K users via L channels for each user is de-spreaded with a spreading code allocated to each user. Interference components among signal components in the de-spreaded signal vector Z obtained are eliminated by a de-correlation filter (33) and pilot signals are detected by a pilot detection part (34) from the interference-eliminated signal vectors for multiple frames. Each of the detected pilot signals is divided by the pilot signal's known symbol to obtain a transfer function in a transfer function interpolation part (35) and a transfer function between consecutive pilot signals is estimated from the transfer functions of the consecutive pilot signals. A de-spreaded signal vector Z is supplied to a de-correlation filter (36) and interferences among signal components are eliminated and transmission distortion is also eliminated using the estimated transfer functions. Regarding the KL signal components obtained in the above process, L signal components corresponding to each user are composited by a phase compensation and composition part (37) so that K composite signals are generated. Those composite signals are level decided by a decision part (38) to regenerate K symbols from K users.
摘要翻译： 通过分配给每个用户的扩展码对每个用户经由L个信道的来自K个用户的每个接收分散信号进行解扩。 通过去相关滤波器（33）去除所获得的解扩信号矢量Z中的信号分量中的干扰分量，并且由针对多帧的干扰消除信号矢量由导频检测部分（34）检测导频信号。 每个检测到的导频信号被导频信号的已知符号除以在传递函数插值部分（35）中获得传递函数，并且根据连续导频信号的传递函数来估计连续导频信号之间的传递函数。 解扩信号矢量Z被提供给去相关滤波器（36），消除了信号分量之间的干扰，并且使用估计的传递函数也消除了传输失真。 关于在上述处理中获得的KL信号分量，对应于每个用户的L个信号分量由相位补偿和合成部分（37）合成，使得产生K个复合信号。 那些复合信号由决定部分（38）决定，从K个用户再生K个符号。
-
6.发明公开METHOD FOR RECEIVING CODE DIVISION MULTIPLEX SIGNAL 失效VERFAHREN ZUM EMPFENEN EINES CODE-DIVISION-MULTIPLEXSIGNALS
公开(公告)号：EP0707385A1
公开(公告)日：1996-04-17
申请号：EP95916031.8
申请日：1995-04-21
IPC分类号： H04B1/69
CPC分类号： H04B1/71052
摘要： A determinant, which represents the relationship between a sequence of code division multiplexed transmission symbol vectors b (k) from L communicators and a sequence of despread output vectors y (k) of received signals taking into account the cross correlation between spreading code sequences of transmitted signals, is limited within the range of ±g symbol duration about symbol timing k, and despread outputs of received signals within the limited range are inputted into 2g+1-stage shift register 24. On the other hand, partial correlation matrixes R k+h (1), R k+h (0) and R k+h (-1) for each symbol duration within the limited range are calculated by a partial correlation computing part 26 with respect to h = -g, ..., g , then a correlation matrix R k between the spreading code sequences corresponding to the L communicators is derived from the partial correlation matrixes in an inverse matrix computing part 27 and an inverse correlation matrix R k ⁻¹ of the correlation matrix is calculated. The inverse correlation matrix R k ⁻¹ and a sequence Y k of the despread outputs y (k) from the shift register are multiplied by a multiplier 25 to obtain an estimated symbol vector sequence.
摘要翻译： 代表来自L个通信器的码分多路复用传输符号向量b（k）的序列与接收信号的解扩输出向量y（k）的序列之间的关系的行列式，其考虑到发送的扩展码序列之间的互相关 信号被限制在关于符号定时k的+/- g符号持续时间的范围内，并且在有限范围内的接收信号的解扩输出被输入到2g + 1级移位寄存器24.另一方面，部分相关矩阵R
<1>的相关矩阵是计算的 迟来。 来自移位寄存器的去扩展输出y（k）的逆相关矩阵Rk <1>和序列Y k被乘以乘法器25以获得估计的符号向量序列。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.014 秒)
