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arXiv 2511.22752eess.SP
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基于FPGA的模数转换器实现x100动态范围扩展:硬件设计与性能评估

FPGA-Enabled Modulo ADC with x100 Dynamic-Range Expansion: Hardware Design and Performance Evaluation

Zeyuan Li, Wenyi Yan, Lu Gan, Guoquan Li, Hongqing Liu

AI总结:

本文提出一种基于FPGA的模数转换器,实现x100动态范围扩展,通过混合信号架构和数字校准技术,在400kHz带宽内实现高保真度的HDR信号采集与评估。

摘要:

传统模拟-数字转换器(ADC)因饱和而无法捕捉高动态范围(HDR)信号。模数转换器通过在量化前折叠输入并算法重建原始波形来克服这一限制。本文提出了一种基于现场可编程门阵列(FPGA)的模数转换器平台,用于系统性评估HDR性能。混合信号架构集成了高精度模拟前端和200MHz FPGA控制回路,该回路包含多比特更新和数字欠补偿校准,确保稳定的折叠和准确的反馈生成。系统在400kHz带宽内实现了超过百倍的动态范围扩展,同时保持与传统ADC相当的保真度。片上系统(SoC)级实现使能够实现板载实时恢复,并支持对最新重建算法的基准测试,提供了一个紧凑且实用的HDR信号采集和评估框架。

英文摘要:

Conventional analog-to-digital converters (ADCs) fail to capture high-dynamic-range (HDR) signals due to clipping. Modulo ADCs circumvent this limitation by folding the input prior to quantization and algorithmically reconstructing the original waveform. This work presents a field-programmable gate array (FPGA)-based modulo ADC platform for systematic HDR performance evaluation. The mixed-signal architecture integrates a precision analog front end with a 200-MHz FPGA control loop that incorporates multi-bit updates and digital under-compensation calibration, ensuring stable folding and accurate feedback generation. The system achieves more than a hundred-fold dynamic-range expansion within a 400-kHz bandwidth while maintaining fidelity comparable to that of a conventional ADC. A system-on-chip (SoC)-like implementation enables on-board real-time recovery and supports benchmarking of state-of-the-art reconstruction algorithms, providing a compact and practical framework for HDR signal acquisition and evaluation.

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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