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首页> 外文期刊>Wireless Communications Letters, IEEE >Overdemodulation for High-Performance Receivers with Low-Resolution ADC
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Overdemodulation for High-Performance Receivers with Low-Resolution ADC

机译：具有高分辨率ADC的高性能接收器的过解调

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摘要

The design of the analog demodulator for receivers with low-resolution analog-to-digital converters (ADCs) is investigated. For infinite ADC resolution, demodulation to baseband with orthogonal sinusoidal functions (quadrature demodulation) is an optimum design choice with respect to system performance. For receivers which are restricted to ADCs with low amplitude resolution, we show that this classical approach is suboptimal under an estimation and information theoretic perspective. To this end, we analyze the theoretical channel parameter estimation performance (Fisher information) under an ideal receive situation when forming analog demodulation channels prior to low-complexity 1-bit ADCs. To demonstrate the impact of overdemodulation for communication problems, we also provide a brief discussion on the achievable transmission rates (Shannon information) with 1-bit quantization of demodulation channels.
机译：研究了具有低分辨率模数转换器（ADC）的接收器的模拟解调器的设计。对于无限的ADC分辨率，就系统性能而言，采用正交正弦函数解调至基带（正交解调）是最佳的设计选择。对于仅限于低幅度分辨率ADC的接收器，我们证明在估计和信息理论的角度下，这种经典方法是次优的。为此，当在低复杂度的1位ADC之前形成模拟解调通道时，我们分析了理想接收情况下的理论通道参数估计性能（Fisher信息）。为了说明过解调对通信问题的影响，我们还对解调通道的1位量化可实现的传输速率（香农信息）进行了简要讨论。

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