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    • 7. 发明申请
    • MSLE DECODER WITH NEURAL NETWORK
    • 具有神经网络的MSLE解码器
    • WO1997048218A1
    • 1997-12-18
    • PCT/EP1997001619
    • 1997-04-01
    • MOTOROLA LIMITEDGOLDING, Paul, AdrianJONES, Alan
    • MOTOROLA LIMITED
    • H04L25/03
    • H04L25/03165H04L25/03178H04L2025/03464
    • To account for non-Gaussian distributed interference (224, 226) that distorts a position of a received symbol sample (230, 232) in input signal space (106), a multi-layer perceptron neural network (MLPNN) is arranged to produce, for a decoding process, a non-linear decision boundary between alternate logical states (220, 222) in a Viterbi trellis of a receiver. The non-linear decision boundary is generated in response to a correlation between a pre-stored sequence of bits in the receiver and corresponding bits of a training sequence received by the receiver and applied to the MLPNN, such that the symbol sample (230, 232), located in an area (224, 226) of input signal space (106) associated with a particular one of the logical states and which area transgresses an equi-distant decision boundary nominally separating the alternate logical states, is interpreted as having a logical value of the particular one of the logical states, as shown in the figure. The decoding process is therefore optimised for an interference limited environment.
    • 为了解决在输入信号空间(106)中扭曲接收到的符号样本(230,232)的位置的非高斯分布干扰(224,226),布置了多层感知器神经网络(MLPNN) 对于解码处理,在接收机的维特比网格中的替代逻辑状态(220,222)之间的非线性判定边界。 响应于接收机中预先存储的比特序列与由接收机接收的应用于MLPNN的训练序列的相应比特之间的相关性,生成非线性判决边界,使得符号样本(230,232 ),其位于与逻辑状态中的特定逻辑状态相关联的输入信号空间(106)的区域(224,226)中,以及哪个区域超过名义上分离替代逻辑状态的等距决定边界被解释为具有逻辑 值的特定逻辑状态,如图所示。 因此,解码过程针对干扰有限的环境进行了优化。
    • 8. 发明申请
    • CASCADE FILTER RECEIVER FOR DS-CDMA COMMUNICATION SYSTEMS
    • 用于DS-CDMA通信系统的级联滤波器接收器
    • WO2004040789A3
    • 2004-07-22
    • PCT/CA0301650
    • 2003-10-29
    • AXIOCOM INCMASSICOTTE DANIELDAHMANE ADEL-OMAR
    • MASSICOTTE DANIELDAHMANE ADEL-OMAR
    • H04B1/707H04L25/03
    • H04B1/7105H04B1/71075H04L25/03305H04L25/03331H04L2025/03464H04L2025/03484H04L2025/03509H04L2025/03617
    • A description of an adaptable multiuser processing unit applied to Direct-Sequence Code Division Multiple Access (DS-CDMA) is disclosed. The adaptable multiuser processing unit consists of cascade filters where each filter is adapted independently. The adaptation of a first filter is based on the error between the output of the first filter and a desired signal, in the same way for the other filters. The adaptation is realized follow a direct, without channel identification, or indirect, with channel identification, procedure. The first filter receives the input signal in Baud (1/T) or Fractionally (k/T) spaced and the last filter gives to the MUD output the decisions on the symbols estimated for each users. A decision feedback may be applied to the input of each filter such as the conventional Decision Feedback Equalizer (DFE). In more, each filter can be linear or nonlinear.
    • 公开了应用于直接序列码分多址(DS-CDMA)的可适应多用户处理单元的描述。 自适应多用户处理单元由级联滤波器组成,其中每个滤波器都是独立调整的。 第一个滤波器的自适应基于第一个滤波器的输出和所需信号之间的误差,对于其他滤波器也是如此。 自适应是直接实现的,没有通道识别,或间接通道识别,程序。 第一个滤波器以波特(1 / T)或分数(k / T)间隔接收输入信号,最后一个滤波器向MUD输出提供关于为每个用户估计的符号的决定。 决策反馈可以应用于每个滤波器的输入,例如传统的判决反馈均衡器(DFE)。 另外,每个滤波器可以是线性或非线性的。