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相关概念视频

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

705
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
705
Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

96
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence...
96
Cascaded Op Amps01:16

Cascaded Op Amps

589
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
589
Design Example01:23

Design Example

316
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
316
Upsampling01:22

Upsampling

204
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...
204
Maximum Power Transfer01:16

Maximum Power Transfer

227
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
227

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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基于群优化的多输入多输出 (ACO-MIMO) 均等化,用于低复杂度的模式分割多重复合 (MDM) 处理.

Tianfeng Zhao, Feng Wen, Bianxia Feng

    Optics express
    |November 22, 2024
    PubMed
    概括
    此摘要是机器生成的。

    两个新的基于群优化 (ACO) 的模式划分多重复合 (MDM) 系统的方案显著降低了多输入多输出 (MIMO) 均化的计算复杂性. 这些ACO-MIMO方法有效地找到最佳参数,提高性能并减少算法调用.

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    相关实验视频

    Last Updated: Jun 6, 2025

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    9.8K
    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    10.8K
    Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection
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    科学领域:

    • 光学通信是指光学通信.
    • 信号处理 信号处理
    • 计算智能是一种计算智能.

    背景情况:

    • 模式分割复杂化 (MDM) 系统在多输入多输出 (MIMO) 均等化中面临着计算复杂性的挑战.
    • 对有限冲动响应 (FIR) 均衡器的步骤大小 (μ) 和点击次数 (K) 等参数进行优化对于性能至关重要.
    • 现有的参数优化的方法是计算密集的.

    研究的目的:

    • 为MDM系统提出基于群优化 (ACO) 的新型MIMO等级方案.
    • 为了减少与找到最佳等分参数 (μ-K组合) 相关的计算复杂性.
    • 评估在循环循环传输系统中拟议方案的性能和稳定性.

    主要方法:

    • 开发两种基于ACO的MIMO均等化方案:固定的ACO-MIMO和随机的ACO-MIMO.
    • 在三模循环循环传输系统中进行实验评估.
    • 与传统的遗传算法 (GA) 和最的下降算法 (SDA) 方案进行比较.

    主要成果:

    • 与传统方法相比,ACO-MIMO方案显著降低了等分算法调用量,高达42.74% (固定) 和80.63% (随机).
    • 在最佳的μ-K组合中达到高达99.34%的高成功率 (Phit).
    • 在各种数据集和往返中表现出稳定的性能,证实了长途MDM传输的稳健运行.

    结论:

    • 拟议的 ACO-MIMO 方案有效地减轻了 MDM MIMO 均等化中的计算负担.
    • 固定的和随机的 ACO-MIMO 方案都提供了显著的复杂性降低和参数优化的高精度.
    • 在不同的比特错误率 (BER) 分布下,这两种 ACO-MIMO 方案的性能都是可比的.