The objective of this lab experiment is tolearn the fundamentals of the directsequence spread spectrum and code division multiple address techniques.To get familiar with thedirectsequence spread spectrummodulator and demodulator. And thedirectsequence spread spectrumsystem can be shown as: Figure 1. Di...
Implementation of Direct Sequence Spread Spectrum using MATLABNithyashree SKarthik S
The enhancement in performance obtained from a DS spread spectrum signal through the processing gain and the coding gain can be used to enable many DS spread spectrum signals to occupy the same channel bandwidth, provided that each signal has its own pseudorandom (signature) sequence. Thus it is...
Direct-Sequence Spread Spectrum Systems Let us consider the transmission of a binary information sequence by means of binary PSK. The information rate is R bits per second, and the bit interval is Tb = 1 / R seconds. The available channel bandwidth is Be hertz, where Be » R. At the ...
1. 直接序列扩频 它使用“直接序列扩频(direct-sequence spread-spectrum)”调变技术,在1.25英寸的距离内,可以在4.5GHz频率在实体层实现56… www.eettaiwan.com|基于5个网页 2. 直接序列展频方式 RF设计与应用蓝芽与无线区域... ... (Wireless LAN 无线区域网路) (1)直接序列展频方式(Direct-sequence spread-...
1.0 Direct Sequence Spread Spectrum (DSSS) Modem Reference Design Functional Specification 14 Introduction Much of the signal processing performed in modern wireless communications systems—such as digital modulator/demodulator applications—takes place in the digital domain and requires high throughput. ...
3.The paper introduces the design and implementation method of adirect sequence spread spectrum signalgenerator.介绍了一种软硬件结合的中频直接序列扩频信号模拟器的设计与实现方法,并对模拟器设计的可行性进行了分析,得出了基带数据经过内插滤波和数字正交调制后,能够获得比基带数据率更高的中频调制信号的结论。
Figure 12.13.Simulation of direct-sequence spread-spectrum communication. (a) Displays from top to bottom the message, the code, and the spread signal. (b) Displays the spectrum of the message and of the spread signal (notice it is wider than that of the message). (c) Displays the band...
Also, direct sequence spread spectrum (DSSS) is used to limit the interference among nearby clusters [62,63]. The CHs consume much higher energy than normal nodes due to their extra communication and computation loads. Therefore, the role of CH is rotated among the nodes periodically to ...
Subsequently,direct-sequence(DS)andhybridDS-THwereproposedtofacilitate IR-MA. 此后,直接序列扩频(DS)和混合的DS-TH被提出用以改进脉冲超宽带多址。 www.fabiao.net 9. Thispaperisbased ontheMATLABsimulationofdirectsequencespreadspectrumcommunicationsystem. ...