当前位置:
首页 资源下载
搜索资源 - spreading and modulation
搜索资源列表
-
0下载:
两个Nokia研究人员写的W-CDMA的仿真代码。
包含信道编码,交织,速率匹配,调制,扩频,信道模型,RACK接收机和相应的解码程序
-two researchers write the W-CDMA simulation code. Includes channel coding, interleaving, matching rate, modulation, spreading, Channel model, RCK receiver decoder and the corres
-
-
0下载:
直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。在接收端,原伪噪声序列和所收信号的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声;同时,将DS信号解扩,恢复原始信息数据。-direct sequence spread spectrum communication can be effective resistance from the channel narrowband
-
-
0下载:
W-CDMA的仿真代码:包含信道编码,交织,速率匹配,调制,扩频,信道模型,RACK接收机和相应的解码程序(matlab和C)。-W-CDMA simulation code : includes channel coding, interleaving, rate matching, modulation, spreading, Channel model, RACK and the corresponding receiver decoder (Matlab and C).
-
-
0下载:
扩展频谱通信系统是指待传输信息的频谱用某个特定的扩频函数扩展后成为宽频带信号,送入信道中传输,再利用一定手段将其压缩,从而获取传输信息的通信系统。
在传输同样信息时所需的射频带宽,远比我们已熟知的各种调制方式要求的带宽要宽得多。扩频带宽至少是信息带宽的几十至 几万倍。-spread spectrum communication systems refer to the transmission of information with a particular spectrum of spre
-
-
2下载:
两个Nokia研究人员写的W-CDMA的仿真过程的整个代码。C code
包含信道编码,交织,速率匹配,调制,扩频,信道模型,RACK接收机和相应的解码程序。
本源码对整个系统进行了仿真,非常具有参考价值,对研究WCDMA系统的任何模块都有帮助-two researchers write the W-CDMA simulation of the entire code. C code includes channel coding, interleaving, rate matching
-
-
1下载:
用matlab simulink写的W-CDMA的仿真过程的整个代码。
包含信道编码,交织,速率匹配,调制,扩频,信道模型,RACK接收机和相应的解码程序。
本源码对整个系统进行了仿真,非常具有参考价值,对研究WCDMA系统的任何模块都有帮助-using Matlab Simulink write W-CDMA simulation of the entire code. Includes channel coding, interleaving, rate matching, modu
-
-
0下载:
3G里使用的Spreading技术演示仿真。用于教学演示的Matlab模型。A demo of spreading code generation and modulation used in 3G.-3G Lane Spreading the use of simulation technology demonstration. Teaching Demonstration for the Matlab model. A demo of spreading code generation an
-
-
0下载:
wo former guest researchers at NIST, Maarit Melvasalo, from VTT, Finland, and Tommi Makelainen from Nokia Research Center, Finland, built a simulation of the 3GPP FDD proposal for 3G wireless. The simulation can run on Simulink or as a stand alone C-
-
-
4下载:
一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道:不考虑通信信道信号时,由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct
-
-
1下载:
wsn中TDOA算法。希望对大家有帮助。-TDOA algorithm in WSN. We hope to be helpful.
-
-
0下载:
一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN信道。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。-A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modulation, AWGN
-
-
0下载:
设计一个四用户的扩频通信系统,扩频增益为N=16,采用Walsh码进行直接序列扩频,BPSK调制,无线信道为AWGN信道。在接收端进行解扩,解调,判决,通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。-Designed a four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modul
-
-
0下载:
TDOA定位中的模糊研究,找出了模糊分布与测量站布局之间的关系。-Ambiguity study of TDOA location system, he distribution of ambiguity and measure stations are found
-
-
1下载:
《2GHz TD-SCDMA数字蜂窝移动通信网 Uu接口物理层技术要求 第4部分:扩频与调制》是《2GHz TD-SCDMA数字蜂窝移动通信网 Uu接口物理层技术要求》部分之一,本部分规定了2GHz TD-SCDMA数字蜂窝移动通信网Uu接口物理层的扩频和调制。
-3GPP TS 25.223 V5.3.0 (2003-03) 3rd Generation Partnership Project
Technical Specification Group Radio Access Ne
-
-
0下载:
Descr iption The WCDMA Physical Layer Demo consists of an end-to-end (transmitter-to-receiver) simulation of the Frequency Division Duplex (FDD) Downlink physical layer for several Dedicated Channels (DCH) as specified by the 3GPP standard (Release 9
-
-
0下载:
CDMA Spreading and Modulation
Downlink includes transmiiter, channel and receiver
-
-
0下载:
WCDMA FDD 物理层matlab仿真-The WCDMA Physical Layer Demo consists of an end-to-end (transmitter-to-receiver) simulation of the Frequency Division Duplex (FDD) Downlink physical layer for several Dedicated Channels (DCH) as specified by the 3GPP standard (
-
-
0下载:
扩频通信系统误码率仿真分析,包括调制解调和误码率判定。-Spread spectrum communication system BER simulation analysis, including modulation and demodulation and error rate judgment.
-
-
3下载:
文件由两部分组成,直扩GMSK调制的matlab仿真程序和Verilog硬件程序。完成了对信号的扩频编码,GMSK调制,硬件程序中的高斯滤波器调用自matlab仿真产生。包括ds_gold_gmsk.m,mseq31.m,zhikuoGMSK.m以及d_encode.v,code_convert.v,frame.v,DS.v,gauss_filter.v,DS_GMSK_MD.v等编码,组帧,滤波,扩频,调制众多源码-Document consists of two parts, DSSS MS
-
-
1下载:
结束语
本文针对扩频技术在WCDMA系统的中的应用进行简单论述及仿真。文中先对扩频通信基本原理及WCDMA的基本原理进行了简单的介绍,也对移动通信和扩频通信的发展进行了简要说明。再对扩频通信技术在WCDMA中的应用进行了简单介绍,最后重点对WCDMA中的扩频、加扰、调制以及解扩、解扰、解调,进行了仿真模型的建立和对仿真结果进行了时域分析。
-Conclusion In this paper the application of spread spectrum technology in
-