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In the next generation of wireless communication systems, there will be a need for the rapid
deployment of independent mobile users. Significant examples include establishing survivable, efficient,
Dynamic communication for emergency operations, disaster relief efforts, and military networks. Such
network scenarios cannot rely on centralized and organized connectivity, and can be conceived as
applications of mobile ad hoc networks. A MANET is an autonomous collection of mobile users that
communicate over relatively bandwidth constrained wireless links. Since the nodes are decentralized, where
all network activity including discovering the
標簽：
communication
generation
the
wireless
上傳時間：
2014-01-04
上傳用戶：tedo811
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The TAS3204 is a highly-integrated audio system-on-chip (SOC) consisting of a fully-programmable, 48-bit digital audio processor, a 3:1 stereo analog input MUX, four ADCs, four DACs, and other analog functionality. The TAS3204 is programmable with the graphical PurePath Studio? suite of DSP code development software. PurePath Studio is a highly intuitive, drag-and-drop environment that minimizes software development effort while allowing the end user to utilize the power and flexibility of the TAS3204’s digital audio processing core.
TAS3204 processing capability includes speaker equalization and crossover, volume/bass/treble control, signal mixing/MUXing/splitting, delay compensation, Dynamic range compression, and many other basic audio functions. Audio functions such as matrix decoding, stereo widening, surround sound virtualization and psychoacoustic bass boost are also available with either third-party or TI royalty-free algorithms.
The TAS3204 contains a custom-designed, fully-programmable 135-MHz, 48-bit digital audio processor. A 76-bit accumulator ensures that the high precision necessary for quality digital audio is maintained during arithmetic operations.
Four differential 102 dB DNR ADCs and four differential 105 dB DNR DACs ensure that high quality audio is maintained through the whole signal chain as well as increasing robustness against noise sources such as TDMA interference.
The TAS3204 is composed of eight functional blocks:
Clocking System
Digital Audio Interface
Analog Audio Interface
Power supply
Clocks, digital PLL
I2C control interface
8051 MCUcontroller
Audio DSP – digital audio processing
特性
Digital Audio Processor
Fully Programmable With the Graphical, Drag-and-Drop PurePath Studio? Software Development Environment
135-MHz Operation
48-Bit Data Path With 76-Bit Accumulator
Hardware Single-Cycle Multiplier (28 × 48)
標簽：
3204
tas
上傳時間：
2016-05-06
上傳用戶：fagong
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Microprocessors are getting smaller, cheaper and faster. Every day, it is easier to embed more functionality into a smaller space. Embedded processors have become pervasive, and as time goes on, more and more functions that were once implemented with analog circuitry or with electromechanical assemblies are being realized with microcontrollers, ADCs and DACs. Many of these assemblies that are being supplanted by the microprocessor are controlling Dynamic processes, which is a good thing, because the microprocessor coupled with the right software is often the superior device.
標簽：
嵌入式系統
控制理論
上傳時間：
2016-07-20
上傳用戶：kunger
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DLL(Dynamic Link Libraries)專題
標簽：
動態鏈接庫
講義
上傳時間：
2018-07-03
上傳用戶：cjlai
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我們編寫的程序由兩個主要方面組成
1 算法的集合就是將指令組織成程序來解決某個特定的問題
2 數據的集合算法在這些數據上操作以提供問題的解決方案
縱觀短暫的計算機發展史這兩個主要方面算法和數據一直保持不變發展演化的
是它們之間的關系就是所謂的程序設計方法programming paradigm
在過程化程序設計方法procedural programming 中一個問題可直接由一組算法來建
立模型例如公共圖書館的資料借閱/登記check out/check in 系統是由一系列過程表現
出來的其中兩個主要的過程是資料的借閱和登記這些數據被獨立存儲起來我們既可以
在某個全局位置上訪問這些數據或者把數據傳遞給過程以便它能夠訪問這些數據Fortran
C 和 Pascal 是三種著名的過程語言C++也支持過程化程序設計單獨的過程如check_in()
check_out() over_due() fine()等等都被稱為函數第三篇將集中討論C++對過程化程序
設計方法的支持尤其將重點討論函數函數模板和通用算法
在20 世紀70 年代程序設計的焦點從過程化程序設計方法轉移到了抽象數據類型
abstract data type 簡寫為ADT 的程序設計上現在通常稱之為基于對象(object based
的程序設計在基于對象的程序設計方法中我們通過一組數據抽象來建立問題的模型在
C++中我們把這些抽象稱為類class 例如在這種方法下圖書館資料借閱登記系統就
由類的對象實例比如書借閱者還書時間罰款等之間的相互作用表現出來以此表
示出圖書館的抽象概念與每個類相關的算法被稱為該類的公有接口public interface 數
據以私有形式被存儲在每個對象中對數據的訪問應與一般的程序代碼隔離開來CLU Ada
和Modula-2 是三種支持抽象數據類型的程序設計語言第四篇將說明和討論C++對抽象數據
類型程序設計方法的支持
面向對象的程序設計方法通過繼承inheritance 機制和動態綁定Dynamic binding 機
制擴展了抽象數據類型繼承機制是對現有實現代碼的重用動態綁定是指對現有的公有接
口的重用以前獨立的類型現在有了類型/子類型的特定關系一本書一盒錄像帶一段錄
音甚至孩子的寵物盡管它們有各自的借閱/登記方式但都可以成為圖書館的收藏資料
共享的公有接口和私有的數據都放在一個抽象類圖書館資料LibraryMaterial 中每個特
殊的圖書館資料類都從LibraryMaterial 抽象類繼承共享的行為它們只需要提供與自身行為相
關的算法和數據Simula Smalltalk 和Java 是三種支持面向對象程序設計方法的著名語言
第五篇將集中討論C++對面向對象程序設計方法的支持
C++是一種支持多種程序設計方法的語言雖然我們主要把它當作面向對象的語言但
實際上它也提供對過程化的和基于對象的程序設計方法的支持這樣做的好處是對每個問題
都能夠提供最合適的解決方案事實上沒有一種程序設計方法能夠
標簽：
c++從入門到精通.pdf電子書 第二版
上傳時間：
2019-01-30
上傳用戶：jizhi111
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Cognitive radio has emerged as a promising technology for maximizing the utiliza-
tion of the limited radio bandwidth while accommodating the increasing amount of
services and applications in wireless networks. A cognitive radio (CR) transceiver
is able to adapt to the Dynamic radio environment and the network parameters to
maximize the utilization of the limited radio resources while providing flexibility in
wireless access. The key features of a CR transceiver are awareness of the radio envi-
ronment (in terms of spectrum usage, power spectral density of transmitted/received
signals, wireless protocol signaling) and intelligence.
標簽：
Cognitive
Wireless
Network
上傳時間：
2020-05-26
上傳用戶：shancjb
-
Designing for Networked Communications: Strategies and Development is a book
about how we plan, use, and understand the products, Dynamic social processes,
and tasks upon which depend some of the most vital innovations in the knowledge
society—social as well as technological ones. Focusing on various forms of design,
implementation, and integration of computer-mediated communication (CMC), the
book bridges the academic fields of computer science and communication stud-
ies.
標簽：
Communications
Designing
Networked
for
上傳時間：
2020-05-27
上傳用戶：shancjb
-
This thesis is about wireless communication in shared radio spectrum. Its origin and
motivation is ideally represented by the two quotations from above. In this thesis, the
support of Quality-of-Service (QoS) in cognitive radio networks is analyzed. New
approaches to distributed coordination of cognitive radios are developed in different
spectrum sharing scenarios. The Wireless Local Area Network (WLAN) 802.11 proto-
col of the Institute of Electrical and Electronics Engineers (IEEE) (IEEE, 2003) with
its enhancement for QoS support (IEEE, 2005d) is taken as basis. The Medium Access
Control (MAC) of 801.11(e) is modified to realize flexible and Dynamic spectrum
assignment within a liberalized regulation framework.
標簽：
Quality-of-Service
Distributed
Support
上傳時間：
2020-05-27
上傳用戶：shancjb
-
Multiuser multiple-input-multiple-output (MU-
MIMO) systems are known to be hindered by dimensionality
loss due to channel state information (CSI) acquisition overhead.
In this paper, we investigate user-scheduling in MU-MIMO
systems on account of CSI acquisition overhead, where a base
station Dynamically acquires user channels to avoid choking the
system with CSI overhead.
標簽：
Acquisition
Dynamic
Channel
上傳時間：
2020-05-27
上傳用戶：shancjb
-
The recent developments in full duplex (FD) commu-
nication promise doubling the capacity of cellular networks using
self interference cancellation (SIC) techniques. FD small cells
with device-to-device (D2D) communication links could achieve
the expected capacity of the future cellular networks (5G). In
this work, we consider joint scheduling and Dynamic power
algorithm (DPA) for a single cell FD small cell network with
D2D links (D2DLs). We formulate the optimal user selection and
power control as a non-linear programming (NLP) optimization
problem to get the optimal user scheduling and transmission
power in a given TTI. Our numerical results show that using
DPA gives better overall throughput performance than full power
transmission algorithm (FPA). Also, simultaneous transmissions
(combination of uplink (UL), downlink (DL), and D2D occur
80% of the time thereby increasing the spectral efficiency and
network capacity
標簽：
Full-Duplex
Cells
Small
上傳時間：
2020-05-27
上傳用戶：shancjb
