VHDL编写的驱动DDS，ad9850的程序，用于产生FM波
上传时间： 2016-02-22
上传用户：924484786
SDP, Service Delivery Platform, is more for telecom operators who want to manage the Data Service better delivered to the end device users by bridging with back-end content providers. Operators rely on the content provider to create & distribute data content to different types of devices. This is different from the open world in the internet communication. Operators must control who can access what content based on his rate plans. Also, based the content access results, the process will be recorded as the transaction records based on which billing statements can be generated to collected the money and shared by operators and content providers. I am working on the conceptual architecture level and the real implementation is very complicated due to too many types of service from different content providers to different types of devices based on the different types of the rate plans.
标签： Service operators Delivery Platform
上传时间： 2016-03-10
上传用户：zycidjl
SDP, Service Delivery Platform, is more for telecom operators who want to manage the Data Service better delivered to the end device users by bridging with back-end content providers. Operators rely on the content provider to create & distribute data content to different types of devices. This is different from the open world in the internet communication. Operators must control who can access what content based on his rate plans. Also, based the content access results, the process will be recorded as the transaction records based on which billing statements can be generated to collected the money and shared by operators and content providers. I am working on the conceptual architecture level and the real implementation is very complicated due to too many types of service from different content providers to different types of devices based on the different types of the rate plans.
标签： Service operators Delivery Platform
上传时间： 2013-12-03
上传用户：yph853211
【下载说明】 这里提供给大家的是《Embedded Linux: Hardware, Software, and Interfacing》（嵌入式 Linux---硬件、软件与接口）一书的英文原版CHM格式下载。 【作者简介】 Craig Hollabaugh has been fascinated by electronics since he bought an AM radio in elementary school. He was first exposed to Unix during a cross-country talk session in 1985. Later, he administered networked Sun and DEC workstations while pursuing a doctoral degree in electrical engineering at Georgia Institute of Technology. 【内容提要】 本书通过一个冬季旅游胜地自动化管理项目实例，从软件、硬件和接口的观点介绍嵌入式Linux。引入项目需求后，作者讲述了开发环境的建立，接着用一系列软硬件接口实例展示了如何使用异步串行通信、PC并口、USB、内存I/O、同步串行通信以及中断，等等。最后介绍了将前面所有的工作有机地组织在一起的系统集成过程。本书以实际应用为导向，书中整个项目的实施过程和软硬件接口实例都具实践指导意义。
标签： Linux Interfacing Embedded Hardware
上传时间： 2014-01-22
上传用户：shus521
This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.
标签： bit-error-rate performance simulates the
上传时间： 2014-01-13
上传用户：whenfly
This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report
标签： communication computers software wireless
上传时间： 2014-05-29
上传用户：wangdean1101
In this letter, the error performance of an ultra-wideband (UWB) system with a hybrid pulse amplitude and position modulation (PAPM) scheme over indoor lognormal fading channels is analyzed. In the PAPM UWB system, input data is modulated onto both the pulse amplitudes and pulse positions.
标签： ultra-wideband performance amplitud letter
上传时间： 2014-01-08
上传用户：yulg
Microsoft .net IL 汇编语言程序设计指南. To tell the truth, I don t think I had much choice in this matter. Let me explain. With Microsoft .NET technology taking the world by storm, with more and more information professionals getting involved, large numbers of books covering various aspects of this technology have started to arrive—and none too soon. Alas, virtually all of these books are dedicated to .NET-based programming in high-level languages and rapid application development (RAD) environments. No doubt this is extremely important, and I am sure all these books will have to be reprinted to satisfy the demand. But what about the plumbing?
标签： Microsoft choice matter truth
上传时间： 2014-11-06
上传用户：二驱蚊器
射频信号的去噪，纯净信号为数字调制的AN,FM,BPSK信号，噪声为高斯白噪声。应用SVD分解方法进行去噪。
上传时间： 2014-09-03
上传用户：王楚楚
Der Aufbau eines kleinen Frequenzzä hers ist dank der heutigen Atmel AVR Controller oder aber auch der Mikrochip PIC Controller (um nur zwei zu nennen) relativ schnell und einfach aufzubauen. Dazu werden meist die internen Timer/Counter des Controllers benutzt. Der Counter wird durch das anliegende Signal am Takteingang hoch gezä hlt. Durch den Timer wird dann der Counter zu einen festgelegten Zeitpunkt stetig ausgelesen und zurückgesetzt. Nehmen wir mal an ein 20Hz TTL-Signal taktet den Counter so steht nun im Counterregister nach einer Sekunde der Wert 20. Dieser wird nur noch auf dem Display oder serielle Schnittstelle ausgegeben. Nach einer erfolgreichen Auktion bei einen einschlä gigen Internet Auktionshaus, erwarb ich einige 7Segment Anzeigen, hierfür musste ich mir etwas einfallen lassen. Heraus kam somit ein besagter kleiner preiswerter 50MHz Frequenzzä hler, den ich nicht vorenthalten will.
标签： Controller Frequenzz heutigen kleinen
上传时间： 2016-06-10
上传用户：1583060504
