概括
我们开发了一种新的FPGA架构,用于delta-sigma调制 (DSM),实现高速数字移动前线运输. 这种并行设计实现了高效的,波形不可知信号数字化和光纤传输.
科学领域:
- 电气工程 电气工程
- 电信 电信服务 电信服务 电信服务
- 信号处理 信号处理
背景情况:
- 数字移动前程需要高速,高效的信号数字化.
- 传统的三角信号调制 (DSM) 架构面临反循环和关键路径的局限性,阻碍了高采样率.
- 现有的并行DSM方案可能需要大量的存储资源.
研究的目的:
- 提出和实验验证一种基于FPGA的新型平行架构,用于delta-sigma调制 (DSM).
- 克服传统的DSM反循环和关键路径约束的局限性.
- 为了使数字移动前线运输在较低的硬件运行速度下实现高采样率.
主要方法:
- 开发了一种基于FPGA的平行架构,用于delta-sigma调制 (DSM).
- 实施了一种位对位量化方法,以最大限度地减少缓冲要求.
- 使用Xilinx Kintex超大尺度FPGA构建并测试了一个实时实验系统.
主要成果:
- 成功将14个载波聚合直角频率分割多重复合 (OFDM) 信号数字化为5Gb/s的PAM4信号.
- 在20公里的单模光纤 (SMF) 上传输数字化信号.
- 经过14个载波聚合过器-银行-多载波 (FBMC) 信号的演示波形不可知数字化,实现了改进的EVM性能.
结论:
- 拟议的基于FPGA的并行DSM架构对于数字移动前线运输是可行的和有效的.
- 该架构支持高采样率和高效的并行处理,克服了传统的DSM限制.
- 这种方法提供了一个波形不可知界面,在电信系统中具有优越性能的潜力.
相关概念视频
01:23Design Example
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01:10Reconstruction of Signal using Interpolation
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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01:22Upsampling
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Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
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01:11Sampling Continuous Time Signal
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In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
In the...
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01:20Discrete-Time Fourier Series
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The Discrete-Time Fourier Series (DTFS) is a fundamental concept in signal processing, serving as the discrete-time counterpart to the continuous-time Fourier series. It allows for the representation and analysis of discrete-time periodic signals in terms of their frequency components. Unlike its continuous counterpart, which utilizes integrals, the calculation of DTFS expansion coefficients involves summations due to the discrete nature of the signal.
For a discrete-time periodic signal x[n]...
For a discrete-time periodic signal x[n]...
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01:17The Delta-to-Delta Circuit
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In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
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