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Multi-input and Multi-variable systems01:22

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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.
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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.
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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...
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If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
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一种混合低复杂性WMMSE预编码器,具有适应性减噪,适用于大型多用户多输入多输出系统.

Vaskar Sen1, Honggui Deng1, Xiaowen Xu1

  • 1School of Electronic Information, Central South University, Changsha 410004, China.

Sensors (Basel, Switzerland)
|November 27, 2025
PubMed
概括

针对大型多用户多输入多输出 (MU-MIMO) 系统的新低复杂性预编码方法提供了与传统方法相似的性能,但计算成本要低得多.

关键词:
适应性缓冲是一种适应性缓冲.混合动力开关的开关是混合动力开关.低复杂性的前编码.这是一个巨大的MU-MIMO.加权最小平均平方误差 (WMMSE)

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科学领域:

  • 无线通信系统无线通信系统
  • 信号处理 信号处理
  • 信息理论是信息理论.

背景情况:

  • 在下链多用户多输入多输出 (MU-MIMO) 系统中最大化加权总量率 (WSR) 是计算密集的.
  • 经典加权最小平均平方误差 (WMMSE) 算法面临着巨大的MU-MIMO的难以承受的复杂性挑战.

研究的目的:

  • 为大型MU-MIMO下链系统开发一个低复杂度的WMMSE (LC-WMMSE) 预编码方法.
  • 为了降低WMMSE算法的计算复杂性,同时保持性能.

主要方法:

  • 引入了混合切换方法,将标准WMMSE更新与伍德伯里矩阵身份近似结合在一起.
  • 整合了一个适应性缓冲机制,以实现稳定的收.
  • 专为大型MU-MIMO下链系统而设计.

主要成果:

  • 拟议的LC-WMMSE方法实现了与经典WMMSE相美的WSR性能.
  • 与传统的WMMSE算法相比,显著降低了计算复杂度.
  • 在大规模的MU-MIMO系统中实践实施的验证适用性.

结论:

  • 对于大型MU-MIMO系统,LC-WMMSE预编码方法提供了一个实用的解决方案.
  • 在计算复杂性和系统性能之间实现了有利的权衡.
  • 在资源有限的大型MU-MIMO环境中实现高效的WSR最大化.