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jia
- 摘要:介绍了利用直接数字合成技术产生频率扫描信 号的新方法。利用计数器和相位累加器实现对波形存 储器寻址, 从而产生频率扫描信号序列。该序列通过 数-模转换器和低通滤波器后, 产生出频率扫描信号。 被合成的频率扫描信号的起始频率、 终止频率和扫描 时间可根据需要随意设定,并且可以实现对三者的精 确控制。-Abstract: The use of direct digital synthesis techniques to create a new method of fr
matlab
- 直接法又称周期图法，它是把随机序列x(n)的N个观测数据视为一能量有限的序列，直接计算x(n)的离散傅立叶变换，得X(k)，然后再取其幅值的平方，并除以N，作为序列x(n)真实功率谱的估计。 -The direct method is also called cycle diagram method, it is the random sequence x (n) n observation data as a energy limited sequence, direct calculatio
Multi-h-CPM-spread-spectrum
- Applying a direct random spreading sequence to a digital information sequence prior to multi-h modulation creates a new class of signals called spread-spectrum multi-h (SSMH) signaling.
DSkuopin
- 直接序列扩频通信系统抗正弦干扰仿真代码-Direct sequence spread spectrum communication system simulation code anti-sinusoidal interference
DSkuopinkanzhaidai
- 用matlab实现直接序列扩频通信系统抗窄带干扰仿真代码-use matlab complete Direct sequence spread spectrum communication system simulation code Narrowband Interference Suppression
QPSK
- Direct sequence spread spectrum (DSSS) communication systems has been widely used in these years for its advantage of wide spectrum, low working Signal-to-Noise ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD.
MATLAB_PGMS
- Binary Phase Shift Keying, BPSK using Rayleigh Channel, Direct sequence spread spectrum, M sequence, Rayleigh channel
WIRELESS
- 该文在大量测试实验和理论分析的基础上，研究电磁波在楼内公共烟道的传输问题，分析公共烟道环境的特殊性以及影响电磁波传输损耗的因素。提出一种适用于楼宇集中净化物联网系统的基于SX1278的无线传输方案。该方案采用直接序列扩频调制来提高系统的抗干扰性能，采用截断二进制指数退避算法作为重传机制来解决节点信号冲突碰撞问题。通过在基站端采用时间片轮转调度，来保证计数的同步性和实时性。集成测试和实地测试结果表明，该方案很好地解决了烟道内无线信号的稳定传输问题，且丢包率和误码率较低，系统可靠性好。-On the
Huffman
- Direct spread spectrum sequence transmitter and receiver by using LPC compression-Direct spread spectrum sequence transmitter and receiver by using LPC compression
code-dsss
- DIRECT SEQUENCE SPREAD SPECTRUM WITH THE LOW TRANSMISSION POWER
cdma
- The main aim of our project is to simulate CDMA modem using DS-SS (Direct sequence spread spectrum) in MATLAB. Spread spectrum is basically type of modulation that spreads data transmission across available frequency band, in excess of minimum ban
Sim-des-of-DSS-spectrum-com_system
- 直接序列扩频通信系统仿真设计,对扩频的整个工作过程进行详细的介绍，并且最后给出matlab代码的实现-Direct sequence spread spectrum communication system simulation design, the spread of the entire work process to carry out a detailed introduction, and finally gives the implementation of matlab code
ofdm-simulink
- 在现代无线通信技术中，扩频通信是一种具有较强抗干扰性能的技术，正交频分复用(OFDM)是一种具有较高数据传输速率和频谱利用率，并能有效对抗频率选择性衰落的多载波调制技术，因而将这二者结合起来构建系统势必会进一步提高系统的抗干扰和抗衰落性能，研究其结合技术也逐渐成为无线通信领域的热点。随着3G的兴起，即将推出的LTE也将采用OFDM技术（正交频分多路复用）。 由于OFDM的多载波特性，使得直接序列扩频技术和跳频技术能够与OFDM技术进行有效的结合。在本文中,我们研究了OFDM）以及相关抗干扰抗
dsss
- 对于直接序列扩频通信系统的初学者很有用，里边包括了程序和说明，很好的东西-It is useful for beginners of direct sequence spread spectrum communication systems, including procedures and instructions, good things
8-1507300148-邓珂可
- 1.实验题目：设计一个程序excise6.cpp，随机产生n个1~99的正整数序列，分别采用直接插入排序、折半插入排序、希尔排序、冒泡排序、快速排序、直接选择排序、堆排序和二路归并排序算法对其进行递增排序，求出每种排序方法所需要的绝对时间。 2.实验项目组成：利用随机数函数产生一个序列，再调用各个排序算法并记录运行时间。(1. experimental subjects: design a program of excise6.cpp, the sequence of positive int