首页> 外文会议>Information Sciences and Systems, 2009. CISS 2009 >UWB signal acquisition in positioning systems: Bayesian compressed sensing with redundancy
【24h】

UWB signal acquisition in positioning systems: Bayesian compressed sensing with redundancy

机译:定位系统中的UWB信号采集:具有冗余的贝叶斯压缩传感

获取原文

摘要

In ultra wide band (UWB) positioning systems, the key problem is to detect the timing of transmitted UWB pulses. Narrow pulses are required for high precision of positioning, thus demanding high sampling rate. To alleviate the difficulty for analog-to-digital converters (ADC) and utilize the feature of time sparsity of UWB pulses, a compressed sensing based scheme is proposed, in which the received signal is mixed using distributed amplifiers, sampled using a bank of low rate ADCs and then reconstructed. To combat the detrimental effect of Gaussian noise, Bayesian compressed sensing is applied, using a structure similar to the iterative decoder for turbo codes to exploit the redundancy in time, history and space. Numerical simulation results demonstrate that the Bayesian compressed sensing using redundancy achieves substantial performance gain (UWB pulse recovery rate and positioning precision), compared with traditional compressed sensing approaches.
机译:在超宽带(UWB)定位系统中,关键问题是检测发射的UWB脉冲的时序。窄脉冲是高精度定位所必需的,因此需要高采样率。为了缓解模数转换器(ADC)的困难并利用UWB脉冲的时间稀疏性特征,提出了一种基于压缩感测的方案,其中,使用分布式放大器对接收到的信号进行混合,使用一组低采样为ADC评级,然后重建。为了对抗高斯噪声的有害影响,应用了贝叶斯压缩感测,它使用类似于turbo码的迭代解码器的结构来利用时间,历史和空间上的冗余。数值模拟结果表明,与传统的压缩传感方法相比,使用冗余的贝叶斯压缩传感实现了可观的性能增益(UWB脉冲恢复率和定位精度)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号