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arXiv 1010.5532cs.ITmath.IT
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信道输出量化的多参数估计

Multiple Parameter Estimation With Quantized Channel Output

Amine Mezghani, Felix Antreich, Josef A. Nossek

摘要:

我们提出了一个一般的问题制定的最佳参数估计的基础上量化的意见,应用到天线阵列通信和处理(信道估计,到达时间(TOA)和到达方向(DOA)估计)。在低分辨率A/D转换器(ADC)必须用于实现更高的采样率和简化硬件的情况下,这项工作是感兴趣的。提出了一种基于期望最大化(EM)的算法来解决这个问题,在一般设置。此外,我们还推导了Cramer-Rao界(CRB),并讨论了量化的影响和ADC特性的最佳选择。数值和分析分析表明,可靠的估计可能仍然是可能的,即使当量化是非常粗糙的。

英文摘要:

We present a general problem formulation for optimal parameter estimation based on quantized observations, with application to antenna array communication and processing (channel estimation, time-of-arrival (TOA) and direction-of-arrival (DOA) estimation). The work is of interest in the case when low resolution A/D-converters (ADCs) have to be used to enable higher sampling rate and to simplify the hardware. An Expectation-Maximization (EM) based algorithm is proposed for solving this problem in a general setting. Besides, we derive the Cramer-Rao Bound (CRB) and discuss the effects of quantization and the optimal choice of the ADC characteristic. Numerical and analytical analysis reveals that reliable estimation may still be possible even when the quantization is very coarse.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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