Description: 现代通信系统（matlab版）随书代码。提供信道容量和编码，扩频通信系统载波调制的数字传输等仿真源代码。-modern communication system (Matlab version) with the code book. Provide channel capacity and coding, spread-spectrum communication system carrier modulation digital transmission simulation source code. Platform: |
Size: 1265664 |
Author:高山 |
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Description: 移动通信信道建模、信源和信道编码、扩频调制技术、同步技术、分集和信道均衡技术、多 用户检测技术、智能天线技术、无线资源管理技术、 ... 本书将全面介绍以上各种技术， 内容涵 盖这些技术的起因、发展状况、基本原理、解决方案以及未来发展趋势等。 ...
-mobile communication channel modeling, source and channel coding, spread-spectrum modulation, synchronization technology, diversity and channel equalization technology, multi-user detection technology, smart antenna technology and radio resource management technology, ... the book will be introduced to all the above technologies, which cover these technology causes, development, the basic principle, solutions and future development trends. ... Platform: |
Size: 245760 |
Author:李锋 |
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Description: 函数通过输入信号序列和函数序号，以及调制解调选择参数来完成扩频调制解调。original_seq是原始输入序列，可能是未调制序列，也可能是调制序列，walsh_num是walsh函数的序号，select选择对输入的序列进行调制还是解调。-function through the input signal sequence and function of the serial number and choice of modulation and demodulation parameters to complete spread spectrum modulation and demodulation. Original_seq is the original input sequence may not be modulated sequence, and may also be modulated sequence, walsh_num walsh function of the serial number, select choice of input sequence modulation or demodulation. Platform: |
Size: 1024 |
Author:刘洪 |
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Description: 直接序列扩频系统是在发端直接用具有高码率的扩频编码去扩展信号的频谱，而在收端用相同的扩频编码进行解扩使扩频信号还原为原始信号的一种扩频方式。直接序列系统中用的编码序列通常是伪随机序列或叫伪噪声（PN）码。要传送的信息经数字化后变成二元数字序列，它和伪随机序列模二相加(或相乘)后变成复合码去调制载波。在直接序列系统中通常对载波进行二进制相移键控调制(BPSK)。当扩频调制后由天线发射出去，在接收机中要有一个和发射机中的伪随机码同步的本地码，对接收信号进行解扩，解扩后的信号送到解调器取出传送的信息-direct sequence spread spectrum system is the originator directly with the high rate of spread spectrum signal coding to the expansion of the spectrum, and the resumption end with the same spread-spectrum coding for despreading spread spectrum signal so that the original signal reverted to a spread-spectrum approach. Direct-sequence system used in the coding sequence is usually pseudo-random sequence, or a pseudo-noise (PN) code. To the transmission of digital information by the following figures into binary sequence, it, and pseudo-random sequence-two together (or multiplication) into a composite code modulation to Carrier. In the direct-sequence system usually right carrier for binary phase shift keying modulation (BPSK). When spread spectrum modulation after the antenna launched, in the Platform: |
Size: 1024 |
Author:成兴 |
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Description: 详细介绍CDMA的工作原理，CDMA扩频通信原理，还介绍了多进制伪码正交调制系统-CDMA details the working principle, CDMA Principles of Spread Spectrum Communication, also introduced the pseudo-code M-ary orthogonal modulation system Platform: |
Size: 866304 |
Author:夏子婷 |
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Description: 扩频通信直扩通信系统。包括调制，解调。各信号的频谱。-Spread Spectrum Communication DS-SS communication system. Including modulation, demodulation. The signal spectrum. Platform: |
Size: 1024 |
Author:triones |
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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: 单用户多载波时频域联合cdma扩频的仿真，使用类编程。包含发送，信道，接收3个类。有联合扩频，调制，FFT变换，高斯信道和瑞利，解调，解扩，统计误码率等功能，减小仿真点数可使程序运行更快。-Single-user multi-carrier cdma joint time-frequency domain spread spectrum simulation, the use of programming. Send contain, channel, receiving three categories. Joint spread spectrum, modulation, FFT transform, Gaussian and Rayleigh channel, demodulation, despreading, statistical features such as bit error rate, reducing the simulation can run faster points. Platform: |
Size: 1074176 |
Author:pf67 |
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Description: 程序仿真了关于扩频系统在两种信道下的误码率-Process simulation of the spread spectrum system in about two channel BER Platform: |
Size: 4096 |
Author:tome |
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Description: 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 channel for the wireless channel. At the receiving end for despreading, demodulation, judgments, through the simulation to be one of a user' s bit error rate and SNR of the simulation results. Platform: |
Size: 1024 |
Author:林立夫 |
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Description: 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 modulation, AWGN channel for the wireless channel. At the receiving end for despreading, demodulation, judgments, through the simulation to be one of a user' s bit error rate and SNR of the simulation results. Platform: |
Size: 5120 |
Author:杨世斌 |
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Description: SPREAD SPECTRUM MODULATION TECHNIQUES
-spread spectrum - those modulation methods that are producing a signal whose
spectrum is more wider than of the data signal, the occupied frequency band being
independent by the signal of data band.
-The signals with spread spectrum of direct sequence type BPSK (BPSK-DS-SS)
-The signals with spread spectrum of direct sequence type QPSK – DS–SS
- Frequency hopping spread spectrum signals (FH-SS)-SPREAD SPECTRUM MODULATION TECHNIQUES
-spread spectrum- those modulation methods that are producing a signal whose
spectrum is more wider than of the data signal, the occupied frequency band being
independent by the signal of data band.
-The signals with spread spectrum of direct sequence type BPSK (BPSK-DS-SS)
-The signals with spread spectrum of direct sequence type QPSK – DS–SS
- Frequency hopping spread spectrum signals (FH-SS) Platform: |
Size: 141312 |
Author:megr3z |
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Description: 扩频通信系统，包括直接序列扩频，PN序列产生，以及调频扩频-Spread spectrum communication system, including direct sequence spread spectrum, PN sequence generation, as well as spread spectrum frequency modulation Platform: |
Size: 7168 |
Author:廖洪运 |
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Description: 雷达信号处理中，杂波抑制的MTD算法源程序
扩频调制中的DDS实现算法，直接序列扩频算法
信号处理分析中的chirp generate LFM signal算法-Radar signal processing, clutter suppression algorithm MTD source of spread spectrum modulation in the DDS algorithm, direct sequence spread spectrum signal processing algorithm for the analysis of the chirp generate LFM signal algorithm Platform: |
Size: 5120 |
Author:冯小刚 |
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Description: The .m file simulates a Spread-Spectrum Modulation Trx/Rcx system, in which, the phase of the pseudo-random sequence generated in the transmitter and used to encode the data stream is unknown a priory at the receiver.A parallel search strategy is employed to locally determine it in the place. It works as here: selecting the maximam-energy low-pass filtered signal of the set of all hypothesied despreaded ones using different hypothesized phases for the PN-sequence.The simulation can be growed in several ways including considering various types of noise and jammings or also designing better filters. Platform: |
Size: 3072 |
Author:Rafal |
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Description: simulink做的BPSK的调制与解调，信号源是随机信号与PN码扩频调制，最后结果与随机信号比较一致-simulink do BPSK modulation and demodulation, the signal source is a random signal with the PN code spread-spectrum modulation, the final result more consistent with the random signal Platform: |
Size: 89088 |
Author:张建云 |
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Description: 基于Visual C++下的BPSK信号的调制和解调，中间有扩频部分-Based on Visual C++ signal under BPSK modulation and demodulation, spread-spectrum part of the middle Platform: |
Size: 742400 |
Author:wang ms |
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Search - spread spectrum modulation