為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式，在分析四相相對移相（QDPSK)信號調(diào)制解調(diào)原理的基礎(chǔ)上，設(shè)計了一種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軟件平臺上，進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，達到了預(yù)期的設(shè)計要求。 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.
標簽： QDPSK CPLD 調(diào)制解調(diào) 電路設(shè)計
上傳時間： 2013-10-28
上傳用戶：jyycc
a set of cross-platform tools that is useful for programming the GBA written in Java.
標簽： cross-platform programming written useful
上傳時間： 2015-01-06
上傳用戶：yd19890720
TheTool is highy customizable map editor(based on QT) which can be extended via LUA scripts. A first implentation is ready and can be published to the public. The editor is the perfect tool who wants to design some 3d games but don t have time to write
標簽： customizable extended TheTool scripts
上傳時間： 2013-12-12
上傳用戶：lanwei
This article is based in part on Bob Place s ADO is AOK (a simple ADO tutorial). Wrapper Usage This is consist of 2 classes. CDyndb : This Class manages connections and recordsets. Recordsets are organized as linked list (CList) and you can access them using their ids. CDynRec : This class is the node to populate for each recordsets. ADO封裝器類 這篇文章一部分基于Bob Place的《ADO is AOK》 (簡單的ADO指導(dǎo)) 。 包裹的用法 由2個類組成。 類CDyndb: 這個類別管理連接和記錄集。記錄集是連接起來的記錄的集合，你可以通過他們的ID訪問他們。 類CDynRec: 這個類別存放記錄集的代碼。
上傳時間： 2013-12-14
上傳用戶：wfl_yy
Mantis an easily deployable, web based bugtracker to aid product bug tracking. It requires PHP, MySQL and a web server. It is simpler than Bugzilla and easily editable. Check out the online Demo.
標簽： deployable bugtracker requires tracking
上傳時間： 2014-01-25
上傳用戶：小寶愛考拉
XMail is an Internet and intranet mail server featuring an SMTP server, POP3 server, finger server, multiple domains, no need for users to have a real system account, SMTP relay checking, RBL/RSS/ORBS/DUL and custom ( IP based and address based ) spam protection, SMTP authentication ( PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom ), a POP3 account syncronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code. XMail sources compile under GNU/Linux, FreeBSD, OpenBSD, NetBSD, OSX, Solaris and NT/2K/XP.
標簽： server featuring Internet intranet
上傳時間： 2015-01-12
上傳用戶：asddsd
Libnet is a cross-platform library aimed at game developers. It has an abstract high level API, which encourages developers to make their games portable across platforms and network types
標簽： cross-platform developers abstract library
上傳時間： 2015-01-14
上傳用戶：ghostparker
SnackAmp is a powerful multi-platform audio music (mp3, ogg ,wav, streams ...) player and organizer for large music collections. Manage your entire collection, including ID3 tagging and auto-playlisting. Integrated web server for remote control/streaming
標簽： multi-platform organizer SnackAmp powerful
上傳時間： 2013-12-22
上傳用戶：3到15
This version of dialog, formerly known as cdialog is based on the Debian package for dialog 0.9a (see CHANGES for recent modifications) 這是一個 unix 系統(tǒng)下的對話框管理程序， 你可以將該程序編譯后，直接使用。
標簽： dialog formerly version cdialog
上傳時間： 2013-12-09
上傳用戶：playboys0
linux client/server based LCD Driver for HD44780
標簽： client Driver server linux
上傳時間： 2014-12-04
上傳用戶：kbnswdifs
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
