Second-generation telecommunication systems, such as the Global System for Mobile Communications (GSM), enabled voice traffic to go wireless: the number of mobile phones exceeds the number of landline phones and the mobile phone penetration is approaching 100% in several markets. The data-handling Capabilities of second-generation systems are limited, however, and third-generation systems are needed to provide the high bit-rate services that enable high-quality images and video to be transmitted and received, and to provide access to the Web with higher data rates.
標(biāo)簽： Evolution WCDMA UMTS HSPA LTE for and
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Driven by the rapid advancement of technology and the growing need of business requirements, cyber communications are embedded in many physical systems. The integration of cyber and physical Capabilities leads to the creation of many applica- tions with enormous societal impact and economic benefit. The emerging systems that connect the cyber-world of computing and communications with the physical world are cyber-physical systems (CPS).
標(biāo)簽： Resiliency Analytics Security and
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
This reference design describes the design of a 3-phase AC induction vector control drive with position encoder coupled to the motor shaft. It is based on Motorola’s DSP56F805 dedicated motor control device. AC induction motors, which contain a cage, are very popular in variable speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC induction drives offer the same control Capabilities as high performance four-quadrant DC drives.
標(biāo)簽： Reference Designer Manual Phase DRM 023 AC
上傳時(shí)間： 2020-06-10
上傳用戶：shancjb
This Getting Started Guide is written for Maxwell beginners and experienced users who would like to quickly re familiarize themselves with the Capabilities of MaxwelL.This guide leads you step-by-step through solving and analyzing the results of a rotational actuator magnetostatic problem with motion By following the steps in this guide, you will learn how to perform the following tasks Modify a models design parameters y Assign variables to a model's design parameters.Specify solution settings for a design Validate a designs setupRun a maxwell simulation v Plot the magnetic flux density vecto v Include motion in the simulation本《入門指南》是為希望快速重新熟悉MaxwelL功能的Maxwell初學(xué)者和有經(jīng)驗(yàn)的用戶編寫的。本指南將引導(dǎo)您逐步解決和分析旋轉(zhuǎn)致動器靜運(yùn)動問題的結(jié)果。按照本指南中的步驟，您將學(xué)習(xí)如何執(zhí)行以下任務(wù)。修改模型設(shè)計(jì)參數(shù)y將變量分配給模型的設(shè)計(jì)參數(shù)。指定設(shè)計(jì)的解決方案設(shè)置驗(yàn)證設(shè)計(jì)設(shè)置運(yùn)行maxwell模擬v繪制磁通密度vecto v在模擬中包含運(yùn)動
上傳時(shí)間： 2022-03-10
上傳用戶：
INTRODUCTION In the past, adding speech recording and playback capability to a product meant using a digital signal processor or a specialized audio chip. Now, using a simplified Adaptive Differential Pulse Code Modulation(ADPCM) algorithm, these audio Capabilities can be added to any PICmicro device. This application note will cover the ADPCM compression and decompression algorithms, performance comparison of all PICmicro devices, and an application using a PIC16C72 micro-controller.DEFINITION OF TERMS step size -value of the step used for quantization of ana-log signals and inverse quantization of a number of steps.quantization -the digital form of an analog input signal is represented by a finite number of steps.adaptive quantization -the step size of a quantizer is dramatically changed with time in order to adapt to a changing input signal.inverse quantizer -a finite number of steps is converted into a digital representation of an analog signal.
上傳時(shí)間： 2022-06-20
上傳用戶：
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