Description: 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 interference. In a DSSS system. Spreading through the sequence of pseudo-noise (PN) to send the right message to data modulation to achieve. On the receiving end, the original pseudo-noise sequence and the received signal may be related Operational narrowband interference signal DS extended to the whole band, make tampering equivalent to a lesser extent than the flat spectrum of noise; Meanwhile, the DS signal disspreaded restore the original data. Platform: |
Size: 111604 |
Author:赵艳朝 |
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Description: 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 spreading function expansion into broadband signal into Channel Tunnel, and then use some of its means of compression, thus acquiring the transmission of information communication systems. In the same transmission of information necessary for RF bandwidth than we have been familiar with the various requirements of the modulation bandwidth to a much wider. Spreading information bandwidth is the bandwidth of at least a few dozen to several tens of thousands of times. Platform: |
Size: 216076 |
Author:12313 |
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Description: 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, modulation, spreading, Channel model, RACK receiver decoder and the corresponding procedures. The source of the entire system for simulation, the very reference value, Study on the WCDMA system will help any module Platform: |
Size: 500297 |
Author:volvo827 |
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Description: 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, modulation, spreading, Channel model, RACK receiver decoder and the corresponding procedures. The source of the entire system for simulation, the very reference value, Study on the WCDMA system will help any module Platform: |
Size: 1209389 |
Author:volvo827 |
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Description: 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 and modulat ion used in 3G. Platform: |
Size: 7515 |
Author:meng |
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Description: 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 interference. In a DSSS system. Spreading through the sequence of pseudo-noise (PN) to send the right message to data modulation to achieve. On the receiving end, the original pseudo-noise sequence and the received signal may be related Operational narrowband interference signal DS extended to the whole band, make tampering equivalent to a lesser extent than the flat spectrum of noise; Meanwhile, the DS signal disspreaded restore the original data. Platform: |
Size: 111616 |
Author:赵艳朝 |
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Description: 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, modulation, spreading, Channel model, RACK receiver decoder and the corresponding procedures. The source of the entire system for simulation, the very reference value, Study on the WCDMA system will help any module Platform: |
Size: 499712 |
Author: |
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Description: 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 and modulat ion used in 3G. Platform: |
Size: 7168 |
Author:meng |
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Description: 扩频的扩频码产生，扩频实现，调制与解调，最后恢复出原始的信号-Spread spectrum spreading code generation, to achieve spread spectrum, modulation and demodulation, the final restoration of the original signal Platform: |
Size: 1024 |
Author:zhanglihua |
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Description: 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 Platform: |
Size: 1024 |
Author:馨迪 |
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Description: Description 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 99).
The current ZIP file includes three different models: channel coding, spreading and modulation and the complete physical layer. Some of the functionalities included in the models are: channel coding and decoding, interleaving, rate matching, mapping to physical channel, spreading, modulation and Rake receiver.
To run the model, unzip the file and type wcdmademos. Platform: |
Size: 320512 |
Author:Luo Zongchao |
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Description: 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 (Release 99).
The current ZIP file includes three different models: channel coding, spreading and modulation and the complete physical layer. Some of the functionalities included in the models are: channel coding and decoding, interleaving, rate matching, mapping to physical channel, spreading, modulation and Rake receiver.
To run the model, unzip the file and type wcdmademos.
Platform: |
Size: 1679360 |
Author:hao |
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Description: 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. Platform: |
Size: 15360 |
Author:fanzhipeng |
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Description: 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 MSK modulation matlab simulation program and Verilog hardware programs. It completed a spreading-coded signal, GMSK modulation, hardware program Gaussian filter called matlab simulation produced. Including ds_gold_gmsk.m, mseq31.m, zhikuoGMSK.m and d_encode.v, code_convert.v, frame.v, DS.v, gauss_filter.v, DS_GMSK_MD.v and other coding, framing, filtering, spreading, many modulation source Platform: |
Size: 5750784 |
Author:陈陈 |
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Description: 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 WCDMA system will be briefly discussed and simulation. This paper first the basic principles and the basic principles of spread spectrum communication WCDMA is a brief introduction on the development of mobile communications and spread spectrum communication are briefly described. And then the spread spectrum communication technology in WCDMA in a brief introduction, finally focusing on the WCDMA spreading, scrambling, modulation and despreading, descrambling, demodulation, carried out to establish the simulation model and the simulation results the time-domain analysis. Platform: |
Size: 752640 |
Author:lixiaoyu |
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