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首页> 外文期刊>Analog Integrated Circuits and Signal Processing >Design of a digital FM demodulator based on a 2nd-order all-digital phase-locked loop
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Design of a digital FM demodulator based on a 2nd-order all-digital phase-locked loop

机译:基于二阶全数字锁相环的数字调频解调器设计

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Software-defined radio (SDR) is a revolution in radio design due to the ability to create radios that can self-adapt on the fly. In SDR devices, all of the signal processing is implemented in the digital domain, mainly on DSP blocks or by DSP software. By simply downloading a new program, a SDR device is able to interoperate with different wireless protocols, incorporate new services, and upgrade to new standards. Therefore, massively parallel signal processing at higher frequencies are needed to implement a realistic SDR. Thus, FPGAs have been used extensively for implementing essential functions in SDR architectures at lower frequencies. In this paper, we explore the design of a digital FM receiver using the approach of an All-Digital Phase Locked-Loop (ADPLL). The circuit is designed in VHDL, then synthesized and simulated using LeonardoSpectrum Level 3 and Model-Sim SE 6, respectively. It operates at a frequency up to 150 MHz and occupies the area of roughly 15 K logic gates.
机译:软件定义无线电(SDR)是无线电设计领域的一场革命,这是因为它具有创建可以实时自适应的无线电的能力。在SDR设备中,所有信号处理都是在数字域中实现的,主要在DSP模块上或通过DSP软件实现。通过简单地下载新程序,SDR设备能够与不同的无线协议互操作,合并新服务并升级到新标准。因此,需要使用更高频率的大规模并行信号处理来实现实际的SDR。因此,FPGA已被广泛用于以较低的频率实现SDR体系结构中的基本功能。在本文中,我们使用全数字锁相环(ADPLL)方法探索数字FM接收机的设计。该电路采用VHDL设计,然后分别使用LeonardoSpectrum Level 3和Model-Sim SE 6进行合成和仿真。它的工作频率高达150 MHz,并占据大约15 K逻辑门的面积。

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