-
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-hot Encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
標(biāo)簽：
Synplicity
Machine
Verilog
Design
上傳時(shí)間：
2013-10-23
上傳用戶(hù)：司令部正軍級(jí)
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在理論分析循環(huán)碼編碼和譯碼基本原理的基礎(chǔ)上，提出了基于單片機(jī)系統(tǒng)的(24，16)循環(huán)碼軟件實(shí)現(xiàn)編碼、譯碼的方案。仿真結(jié)果表明(24，16)循環(huán)碼能有效地克服來(lái)自通訊信道的干擾，保證數(shù)據(jù)通信的可靠及系統(tǒng)的穩(wěn)定，使誤碼率大幅度降低。本論文對(duì)(24，16)循環(huán)碼的研究結(jié)果表明，可以有效地降低錯(cuò)誤概率和提高系統(tǒng)的吞吐量，實(shí)現(xiàn)糾錯(cuò)僅需要在接收端增加有限的存儲(chǔ)空間和計(jì)算復(fù)雜度，具有一定的實(shí)用價(jià)值。
Abstract:
Based on analyzing the theory of Encoding and decoding of cyclic code， this paper showed the schemes of Encoding and decoding of(24，16)cyclic code by the software and based on microcontroller. Simulation results show that using (24，16) cyclic codes can effectively overcome the interference from communication channel， ensure the reliability and stability of data communication systems， and reduce the bit error rate greatly. The results of this paper show that by using the (24，16) cyclic code， the error rate can be reduced and the system throughput can be improved. Meanwhile， the system only needs to enlarge limited storage space and computation the complexity at the receiving end to realize error correction. Thus the (24，16) cyclic code has a practical value.
標(biāo)簽：
24
16
單片機(jī)系統(tǒng)
循環(huán)碼
上傳時(shí)間：
2013-11-09
上傳用戶(hù)：gaoliangncepu
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針對(duì)煤礦井下調(diào)度及緊急救援系統(tǒng)的需求，以DTMF編解碼模塊為核心，設(shè)計(jì)了具有自動(dòng)撥號(hào)功能的新型電話(huà)系統(tǒng)。該系統(tǒng)利用MT8880對(duì)DTMF信號(hào)的編解碼功能實(shí)現(xiàn)一鍵撥號(hào)和遠(yuǎn)程設(shè)置，通過(guò)檢測(cè)振鈴和忙音信號(hào)，完成自動(dòng)摘機(jī)和掛機(jī)過(guò)程，配合AGC等外圍電路達(dá)到話(huà)音清晰流暢的效果。
Abstract:
To meet the demand for mine scheduling and emergency rescue system， with using DTMF signal codec as the core， a new telephone system was designed with automatic dialing function. In the system， the DTMF signal Encoding and decoding function of MT8880 was used to achieve one-touch dialing and remote setting. The circuit detects the ringing and busy signal， and then completes automatic off-hook and hangup. With AGC(Automatic Gain Control) and other peripheral circuits， the voice was regulated to a clear and smooth effect.
標(biāo)簽：
8880
MT
撥號(hào)電話(huà)
系統(tǒng)設(shè)計(jì)
上傳時(shí)間：
2014-11-18
上傳用戶(hù)：ly1994
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為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式，在分析四相相對(duì)移相（QDPSK)信號(hào)調(diào)制解調(diào)原理的基礎(chǔ)上，設(shè)計(jì)了一種QDPSK調(diào)制解調(diào)電路，它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺(tái)上，進(jìn)行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中，測(cè)試結(jié)果表明，調(diào)制電路能正確選相，解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致，達(dá)到了預(yù)期的設(shè)計(jì)要求。
Abstract:
In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential Encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
標(biāo)簽：
QDPSK
CPLD
調(diào)制解調(diào)
電路設(shè)計(jì)
上傳時(shí)間：
2014-01-13
上傳用戶(hù)：qoovoop
-
很多不同的廠家生產(chǎn)各種型號(hào)的計(jì)算機(jī)，它們運(yùn)行完全不同的操作系統(tǒng)，但TCP.IP協(xié)議族允許它們互相進(jìn)行通信。這一點(diǎn)很讓人感到吃驚，因?yàn)樗淖饔靡堰h(yuǎn)遠(yuǎn)超出了起初的設(shè)想。T C P / I P起源于6 0年代末美國(guó)政府資助的一個(gè)分組交換網(wǎng)絡(luò)研究項(xiàng)目，到9 0年代已發(fā)展成為計(jì)算機(jī)之間最常應(yīng)用的組網(wǎng)形式。它是一個(gè)真正的開(kāi)放系統(tǒng)，因?yàn)閰f(xié)議族的定義及其多種實(shí)現(xiàn)可以不用花錢(qián)或花很少的錢(qián)就可以公開(kāi)地得到。它成為被稱(chēng)作“全球互聯(lián)網(wǎng)”或“因特網(wǎng)(Internet)”的基礎(chǔ)，該廣域網(wǎng)（WA N）已包含超過(guò)1 0 0萬(wàn)臺(tái)遍布世界各地的計(jì)算機(jī)。本章主要對(duì)T C P / I P協(xié)議族進(jìn)行概述，其目的是為本書(shū)其余章節(jié)提供充分的背景知識(shí)。
TCP.IP協(xié)議 縮略語(yǔ)
ACK (ACKnowledgment) TCP首部中的確認(rèn)標(biāo)志
API (Application Programming Interface) 應(yīng)用編程接口
ARP (Address Resolution Protocol) 地址解析協(xié)議
ARPANET(Defense Advanced Research Project Agency NETwork) (美國(guó))國(guó)防部遠(yuǎn)景研究規(guī)劃局
AS (Autonomous System) 自治系統(tǒng)
ASCII (American Standard Code for Information Interchange) 美國(guó)信息交換標(biāo)準(zhǔn)碼
ASN.1 (Abstract Syntax Notation One) 抽象語(yǔ)法記法1
BER (Basic Encoding Rule) 基本編碼規(guī)則
BGP (Border Gateway Protocol) 邊界網(wǎng)關(guān)協(xié)議
BIND (Berkeley Internet Name Domain) 伯克利I n t e r n e t域名
BOOTP (BOOTstrap Protocol) 引導(dǎo)程序協(xié)議
BPF (BSD Packet Filter) BSD 分組過(guò)濾器
CIDR (Classless InterDomain Routing) 無(wú)類(lèi)型域間選路
CIX (Commercial Internet Exchange) 商業(yè)互聯(lián)網(wǎng)交換
CLNP (ConnectionLess Network Protocol) 無(wú)連接網(wǎng)絡(luò)協(xié)議
CRC (Cyclic Redundancy Check) 循環(huán)冗余檢驗(yàn)
CSLIP (Compressed SLIP) 壓縮的S L I P
CSMA (Carrier Sense Multiple Access) 載波偵聽(tīng)多路存取
DCE (Data Circuit-terminating Equipment) 數(shù)據(jù)電路端接設(shè)備
DDN (Defense Data Network) 國(guó)防數(shù)據(jù)網(wǎng)
DF (Don’t Fragment) IP首部中的不分片標(biāo)志
DHCP (Dynamic Host Configuration Protocol) 動(dòng)態(tài)主機(jī)配置協(xié)議
DLPI (Data Link Provider Interface) 數(shù)據(jù)鏈路提供者接口
DNS (Domain Name System) 域名系統(tǒng)
DSAP (Destination Service Access Point) 目的服務(wù)訪問(wèn)點(diǎn)
DSLAM (DSL Access Multiplexer) 數(shù)字用戶(hù)線接入復(fù)用器
DSSS (Direct Sequence Spread Spectrum) 直接序列擴(kuò)頻
DTS (Distributed Time Service) 分布式時(shí)間服務(wù)
DVMRP (Distance Vector Multicast Routing Protocol) 距離向量多播選路協(xié)議
EBONE (European IP BackbONE) 歐洲I P主干網(wǎng)
EOL (End of Option List) 選項(xiàng)清單結(jié)束
EGP (External Gateway Protocol) 外部網(wǎng)關(guān)協(xié)議
EIA (Electronic Industries Association) 美國(guó)電子工業(yè)協(xié)會(huì)
FCS (Frame Check Sequence) 幀檢驗(yàn)序列
FDDI (Fiber Distributed Data Interface) 光纖分布式數(shù)據(jù)接口
FIFO (First In, First Out) 先進(jìn)先出
FIN (FINish) TCP首部中的結(jié)束標(biāo)志
FQDN (Full Qualified Domain Name) 完全合格的域名
FTP (File Transfer Protocol) 文件傳送協(xié)議
HDLC (High-level Data Link Control) 高級(jí)數(shù)據(jù)鏈路控制
HELLO 選路協(xié)議
IAB (Internet Architecture Board) Internet體系結(jié)構(gòu)委員會(huì)
IANA (Internet Assigned Numbers Authority) Internet號(hào)分配機(jī)構(gòu)
ICMP (Internet Control Message Protocol) Internet控制報(bào)文協(xié)議
IDRP (InterDomain Routing Protocol) 域間選路協(xié)議
IEEE (Institute of Electrical and Electronics Engineering) （美國(guó)）電氣與電子工程師協(xié)會(huì)
IEN (Internet Experiment Notes) 互聯(lián)網(wǎng)試驗(yàn)注釋
IESG (Internet Engineering Steering Group) Internet工程指導(dǎo)小組
IETF (Internet Engineering Task Force) Internet工程專(zhuān)門(mén)小組
IGMP (Internet Group Management Protocol) Internet組管理協(xié)議
IGP (Interior Gateway Protocol) 內(nèi)部網(wǎng)關(guān)協(xié)議
IMAP (Internet Message Access Protocol) Internet報(bào)文存取協(xié)議
IP (Internet Protocol) 網(wǎng)際協(xié)議
I RTF (Internet Research Task Force) Internet研究專(zhuān)門(mén)小組
IS-IS (Intermediate System to Intermediate System Protocol) 中間系統(tǒng)到中間系統(tǒng)協(xié)議
ISN (Initial Sequence Number) 初始序號(hào)
ISO (International Organization for Standardization) 國(guó)際標(biāo)準(zhǔn)化組織
ISOC (Internet SOCiety) Internet協(xié)會(huì)
LAN (Local Area Network) 局域網(wǎng)
LBX (Low Bandwidth X) 低帶寬X
LCP (Link Control Protocol) 鏈路控制協(xié)議
LFN (Long Fat Net) 長(zhǎng)肥網(wǎng)絡(luò)
LIFO (Last In, First Out) 后進(jìn)先出
LLC (Logical Link Control) 邏輯鏈路控制
LSRR (Loose Source and Record Route) 寬松的源站及記錄路由
MBONE (Multicast Backbone On the InterNEt) Internet上的多播主干網(wǎng)
MIB (Management Information Base) 管理信息庫(kù)
MILNET (MILitary NETwork) 軍用網(wǎng)
MIME (Multipurpose Internet Mail Extensions) 通用I n t e r n e t郵件擴(kuò)充
MSL (Maximum Segment Lifetime) 報(bào)文段最大生存時(shí)間
MSS (Maximum Segment Size) 最大報(bào)文段長(zhǎng)度
M TA (Message Transfer Agent) 報(bào)文傳送代理
MTU (Maximum Transmission Unit) 最大傳輸單元
NCP (Network Control Protocol) 網(wǎng)絡(luò)控制協(xié)議
NFS (Network File System) 網(wǎng)絡(luò)文件系統(tǒng)
NIC (Network Information Center) 網(wǎng)絡(luò)信息中心
NIT (Network Interface Tap) 網(wǎng)絡(luò)接口栓（S u n公司的一個(gè)程序）
NNTP (Network News Transfer Protocol) 網(wǎng)絡(luò)新聞傳送協(xié)議
NOAO (National Optical Astronomy Observatories) 國(guó)家光學(xué)天文臺(tái)
NOP (No Operation) 無(wú)操作
NSFNET (National Science Foundation NETwork) 國(guó)家科學(xué)基金網(wǎng)絡(luò)
NSI (NASA Science Internet) （美國(guó)）國(guó)家宇航局I n t e r n e t
NTP (Network Time Protocol) 網(wǎng)絡(luò)時(shí)間協(xié)議
NVT (Network Virtual Terminal) 網(wǎng)絡(luò)虛擬終端
OSF (Open Software Foudation) 開(kāi)放軟件基金
OSI (Open Systems Interconnection) 開(kāi)放系統(tǒng)互連
OSPF (Open Shortest Path First) 開(kāi)放最短通路優(yōu)先
PAWS (Protection Against Wrapped Sequence number) 防止回繞的序號(hào)
PDU (Protocol Data Unit) 協(xié)議數(shù)據(jù)單元
POSIX (Portable Operating System Interface) 可移植操作系統(tǒng)接口
PPP (Point-to-Point Protocol) 點(diǎn)對(duì)點(diǎn)協(xié)議
PSH (PuSH) TCP首部中的急迫標(biāo)志
RARP (Reverse Address Resolution Protocol) 逆地址解析協(xié)議
RFC (Request For Comments) Internet的文檔，其中的少部分成為標(biāo)準(zhǔn)文檔
RIP (Routing Information Protocol) 路由信息協(xié)議
RPC (Remote Procedure Call) 遠(yuǎn)程過(guò)程調(diào)用
RR (Resource Record) 資源記錄
RST (ReSeT) TCP首部中的復(fù)位標(biāo)志
RTO (Retransmission Time Out) 重傳超時(shí)
RTT (Round-Trip Time) 往返時(shí)間
SACK (Selective ACKnowledgment) 有選擇的確認(rèn)
SLIP (Serial Line Internet Protocol) 串行線路I n t e r n e t協(xié)議
SMI (Structure of Management Information) 管理信息結(jié)構(gòu)
SMTP (Simple Mail Transfer Protocol) 簡(jiǎn)單郵件傳送協(xié)議
SNMP (Simple Network Management Protocol) 簡(jiǎn)單網(wǎng)絡(luò)管理協(xié)議
SSAP (Source Service Access Point) 源服務(wù)訪問(wèn)點(diǎn)
SSRR (Strict Source and Record Route) 嚴(yán)格的源站及記錄路由
SWS (Silly Window Syndrome) 糊涂窗口綜合癥
SYN (SYNchronous) TCP首部中的同步序號(hào)標(biāo)志
TCP (Transmission Control Protocol) 傳輸控制協(xié)議
TFTP (Trivial File Transfer Protocol) 簡(jiǎn)單文件傳送協(xié)議
TLI (Transport Layer Interface) 運(yùn)輸層接口
TTL (Ti m e - To-Live) 生存時(shí)間或壽命
TUBA (TCP and UDP with Bigger Addresses) 具有更長(zhǎng)地址的T C P和U D P
Telnet 遠(yuǎn)程終端協(xié)議
UA (User Agent) 用戶(hù)代理
UDP (User Datagram Protocol) 用戶(hù)數(shù)據(jù)報(bào)協(xié)議
URG (URGent) TCP首部中的緊急指針標(biāo)志
UTC (Coordinated Universal Time) 協(xié)調(diào)的統(tǒng)一時(shí)間
UUCP (Unix-to-Unix CoPy) Unix到U n i x的復(fù)制
WAN (Wide Area Network) 廣域網(wǎng)
WWW (World Wide Web) 萬(wàn)維網(wǎng)
XDR (eXternal Data Representation) 外部數(shù)據(jù)表示
XID (transaction ID) 事務(wù)標(biāo)識(shí)符
XTI (X/Open Transport Layer Interface) X/ O p e n運(yùn)輸層接口
標(biāo)簽：
tcp
協(xié)議
上傳時(shí)間：
2013-11-13
上傳用戶(hù)：tdyoung
-
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-hot Encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
標(biāo)簽：
Synplicity
Machine
Verilog
Design
上傳時(shí)間：
2013-10-20
上傳用戶(hù)：蒼山觀海
-
為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式，在分析四相相對(duì)移相（QDPSK)信號(hào)調(diào)制解調(diào)原理的基礎(chǔ)上，設(shè)計(jì)了一種QDPSK調(diào)制解調(diào)電路，它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺(tái)上，進(jìn)行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中，測(cè)試結(jié)果表明，調(diào)制電路能正確選相，解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致，達(dá)到了預(yù)期的設(shè)計(jì)要求。
Abstract:
In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential Encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
標(biāo)簽：
QDPSK
CPLD
調(diào)制解調(diào)
電路設(shè)計(jì)
上傳時(shí)間：
2013-10-28
上傳用戶(hù)：jyycc
-
This packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate. The simulation is written for static channel and AWGN noise.
The packet include:
1) Packet Builder (Viterbi Encoding, Interleaver, PN generation)
2) Modulator (RRC filter)
3) Demodulator (Matched Filter, RAKE receiver)
4) Receiver (HD or SD) (Deinterleaver, Viterbi Decoder).
You should run "Simulation.m" function that include all modules.
標(biāo)簽：
simulation
baseband
channel
packet
上傳時(shí)間：
2014-11-09
上傳用戶(hù)：hwl453472107
-
This file contains a new and improved version of the Huffman coder, (June 29. 2001). The name is Huff06.m. There are also some additional files which are helpful when using Matlab for data compression: quantizer, different variants of run-length-Encoding and end-of-block coding in Mat2Vec, and a program which do JPEG-like entropy coding. A complete compression example is shown in TestMat2Vec.m. This file is all you need for Huffman coding in MatLab.
標(biāo)簽：
contains
improved
Huffman
version
上傳時(shí)間：
2015-07-05
上傳用戶(hù)：jeffery
-
eBook "Multimedia Technology Fundation and Application", PDF file,re-edited on Dec 19, 2006.
Contents: MIDI, Encoding,Compression, Image Format, MPEG TV, TCP/IP, HTML, JavaScript
標(biāo)簽：
Application
Multimedia
Technology
Fundation
上傳時(shí)間：
2015-08-14
上傳用戶(hù)：epson850
