ID 原文 译文
58838 在当前窗口的迭代译码过程中,若目标符号的平均对数似然比小于预设阈值,则译码窗口大小加1后重新进行迭代,重复此过程,直至目标符号满足阈值条件或达到窗口大小的最大值,然后在新的窗口大小下译码目标符号。 Specifically, for every iteration in the decoding process, we compare the average LLR value of the target symbol with the preset threshold. If the average LLR value of the target symbol is less than the preset threshold and the current window size does not exceed the maximum size, the decoding window size adds one and then performs a new iteration with the new window size.
58839 该方案可以在译码性能、复杂度和延迟之间进行折中权衡。 By this means, the scheme can achieve trade-off between decoding performance, complexity and latency.
58840 在加性高斯白噪声信道下的仿真结果表明,该方案可以显著提高空间耦合低密度奇偶校验码的滑窗译码性能。 Simulation results on the additive white Gaussian noise (AWGN) channel show that this scheme can significantly improve the sliding window decoding performance of SC-LDPC codes.
58841 针对传统差分混沌移位键控传输速率低并且传输多用户信息时比特误码率较高的缺点,提出一种改进型正交多用户降噪差分混沌键控通信系统。 Aiming at the shortcomings of a low transmission rate in traditional Differential Chaos Shift Keying (DCSK) and a high bite error rate when transmitting multi-user information, an improved orthogonal multi-user noise reduction differential chaotic keying (OMU-NRDCSK) is proposed.
58842 系统发送端产生的混沌序列经过复制后作为信息承载信号,通过不同的延时分别携带经沃尔什码调制的多用户信息,信号在接收端经过滑动平均滤波器后与自身进行相关运算,以解调出原始信息比特。 The chaotic sequence generated at the sending end of the system is used as an information bearing signal after being duplicated, the multi-users’ information modulated by the Walsh codes are transmitted respectively through different delays. At the receiver, after passing through the moving average filter, the received signals are correlated with themselves to demodulate the initial information signals.
58843 在瑞利衰落信道下推导了系统的理论比特误码率公式,并进行了蒙特卡罗仿真。 The bit error rate formula for the system under the Rayleigh fading channel is derived and Monte Carlo simulation is carried out.
58844 分析与仿真结果表明,该系统通过对接收信号的平均运算降低了噪声项方差,系统误码性能得以提高,并且其传输速率相比于差分混沌移位键控系统有所提升,有效地改善了多用户差分混沌移位键控系统的误码性能。 Analytical and simulation results show that the OMU-NRDCSK system reduces the noise term variance by averaging the received signals and improves the bit error performance, with its transmission rate improved compared to the DCSK system, which effectively improves the bit error performance of the multi-user DCSK system.
58845 为了提高定位系统抗干扰性,降低定位误差,提出一种基于递归贝叶斯的指纹定位算法。 To improve the robustness of a position system and reduce the localization error, this paper proposes a fingerprint positioning method based on the recursive Bayesian.
58846 针对离线阶段指纹数据采集的盲目性与不可靠性,利用样本方差对采样值的可信度进行衡量,降低环境因素对数据的影响,为在线匹配提供更有效的可靠指纹库。 To solve the blindness and unreliability of the location fingerprint data in an offline phase, the fingerprint database based on the sample variance is developed to measure the confidence of sampling values and reduce the impact of environmental factors, improving the reliability for online localization.
58847 利用目标运动过程中相邻时刻间的约束关系构建马尔可夫模型,以预测当前时刻目标位置,克服传统定位算法经常出现的位置估计跳动范围大、鲁棒性差等问题,提高了定位精度。 The proposed method provides the target position at the current moment by utilizing the Markov model that is established by the constraint relationship between moments in the source movement, which avoids the jump problem of the position estimation and poor robustness and improves the localization accuracy.