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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
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Size: 1024 |
Author: 成兴 |
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Description: 这是篇一种利用PN序列的OFDM频率同步，觉得很有用，与大家共同享用。-this chapter is a use of the PN sequence OFDM frequency synchronization, feel useful, and we enjoyment.
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Size: 153600 |
Author: |
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Description: 扩频通信中的捕获问题，用GOLD码进行扩频， PN码相位捕获，利用捕获的相位，接收机产生偏移的GOLD码，进行解扩和误码率计算-Spread Spectrum Communication capture issue, GOLD spread spectrum code, PN phase acquisition. The capture phase, the receiver have offset the GOLD code for despreading and bit error rate calculation
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Size: 2048 |
Author: mi_kenny |
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Description: PN码生成程序,可以生成L1波段的GOLD扩频码.修改抽头位置可以改变其对应的卫星号.-PN code generation process, generate L1 band GOLD spreading codes. Tap changes its location can be changed, the corresponding satellite.
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Size: 44032 |
Author: Jerry |
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Description: DSP2407的外置AD加DSP的M15伪码快速捕获程序,可下载,烧写,可运行-DSP2407 external AD plus the M15 PN code DSP Rapid Acquisition procedures, can be downloaded, programmer, can run
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Size: 34816 |
Author: sss |
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Description: PN码发生器的matlab程序，对于写vhdl代码有很重要得参考价值-PN code generator matlab procedures, write VHDL code for a very important reference value was
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Size: 1024 |
Author: ylt |
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Description: 已知f(xn)=yn ,n=0,1,2,…,N；求通过这N+1个节点{（xn，yn）| n=0,1,2,…,N }的插值函数Pn (x)。 设计出具体的程序，分别使用拉格朗日插值，牛顿插值和三次自然样条三种算法绘制出相应的插值曲线。用三条不同颜色的曲线来表示三种插值方法在一段区间内的插值函数。要求动态显示曲线绘制全过程。-Known f (xn) = yn, n = 0,1,2, ..., N seeking the passage of the N+ 1 nodes ((xn, yn) | n = 0,1,2, ..., N) of the intercalation value function Pn (x). Design a specific procedure, namely the use of Lagrange interpolation, Newton interpolation and three natural three-spline algorithm to map out the corresponding interpolation curve. Using three different colors to indicate the three curve interpolation methods over a period of range of interpolation function. Requirements of dynamic display curve drawing the whole process.
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Size: 16384 |
Author: jack |
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Description: 直接序列扩频通信中PN码同步技术的研究，对于研究伪随机序列和扩频通信的人很有帮助哦、-Direct sequence spread spectrum PN code synchronization communication technology, the study of pseudo-random sequence spread spectrum communication and people very helpful Oh,
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Size: 84992 |
Author: caidan |
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Description: This packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate.
The simulation is written for static channel and AWGN noise. The packet include:
1) Packet Builder (Viterbi Encoding, Interleaver, PN generation)
2) Modulator (RRC filter)
3) Demodulator (Matched Filter, RAKE receiver)
4) Receiver (HD or SD) (Deinterleaver, Viterbi Decoder). -This packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate. The simulation is written for static channel and AWGN noise. The packet include: 1) Packet Builder (Viterbi Encoding, Interleaver, PN generation) 2) Modulator ( RRC filter) 3) Demodulator (Matched Filter, RAKE receiver) 4) Receiver (HD or SD) (Deinterleaver, Viterbi Decoder).
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Size: 10240 |
Author: 老何 |
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Description: 对于一元n次多项式Pn（x）=...用适当的数据结构表示，并要求对其实现求导和给定x后多项式的值。-For a dollar n polynomial Pn (x )=... using appropriate data structures and requires the achievement of its derivation and the given value of x after the polynomial.
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Size: 1024 |
Author: 阿刀侠 |
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Description: 针对IS95进行MATLAB仿真，压缩包内共包含11个源文件，分别对PN序列的产生，调制，解调等进行了仿真。-MATLAB simulation carried out for IS95, compressed package that contains a total of 11 source files, respectively, on the PN sequence generation, modulation, demodulation, such as simulation.
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Size: 9216 |
Author: huanglixun |
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Description: IS-95 matlab源码。包括PN产生，打包，调制，解调，维特编码和解码，接收机等。
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Size: 3862528 |
Author: 秦丽 |
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Description: 直接序列扩频Matlab程序
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。-Matlab procedures for direct sequence spread spectrum direct sequence spread spectrum communications can effectively resist the narrow-band interference from the channel. In a DSSS communication systems, spread spectrum pseudo-noise sequence through (PN) for sending information data modulation is achieved. At the receiving end, the original pseudo-noise sequence and the received signal related to computing can be extended to narrow-band interference signal DS the whole band, so interference is equivalent to a lesser extent than the flat spectrum of noise At the same time, the DS signal despreading and restore original information data.
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Size: 1024 |
Author: 周一 |
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Description: 本文为PDF格式论文,介绍了直扩系统的PN码的同步仿真-PDF format this article for the paper, introduced the DS-System Simulation of PN code synchronization
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Size: 82944 |
Author: 梁艳霞 |
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Description: GPS的pn码捕获matlab仿真程序，通过序列相关实现捕获功能-GPS-pn code acquisition matlab simulation program, through the serial correlation realize capture
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Size: 1024 |
Author: 李永 |
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Description: 应用于扩频通信，关于PN码扩频，在matlab中的完整程序代码。-Applied to spread spectrum communication, spread spectrum on the PN code in matlab full program code.
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Size: 1024 |
Author: 王卓 |
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Description: 产生PN序列码的源代码，里面有详细的注释！希望对有需要的朋友有用！-PN code sequence generated source code, which has detailed notes! Wish to have a friend in need useful!
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Size: 1024 |
Author: 李新苗 |
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Description: PN中的GOLD码生成源程序（matlab）-GOLD in the PN code to generate source code (matlab)
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Size: 1024 |
Author: 吴锋 |
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Description: 可以产生PN码序列，可用于直扩通信等需要PN序列的地方。-Can generate PN code sequence, can be used for DSSS communications needs of the local PN sequence.
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Size: 1024 |
Author: renxiaomin |
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Description: OFDM系统中以PN序列作为循环前缀和传统梳状导频信道估计方法对比-OFDM system with PN sequence as a cyclic prefix and traditional comb pilot channel estimation methods
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Size: 8192 |
Author: 王寿珍 |
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