radio communication, spread spectrum, frequency hopping, bluetooth, global system for mobile communication, unmanned aerial vehicles 扩频(Spread spectrum)是一种广泛用于军事通信的调制方式。在扩频调制中,传输信号的带宽远大于原始消息的带宽,并由扩频码( spreading code )决定(Yahya 等人,2006 年)。扩频码是一...
nodes (114) that serve as repeaters, each communication node (114) communicating a communication packet comprising a preamble portion communicated on a dedicated acquisition channel of a frequency spectrum and a data portion communicated on at least one dedicated data channel of the frequency spectrum...
The Frequency-Hopping Spread Spectrum (FHSS) is a means of transmitting radio signals by shifting a carrier across a number of channels with a pseudorandom sequence that the sending and receiving station knows beforehand. The method is used as a multiple access process in the FH-CDMA (Frequency...
Frequency hopping spread spectrum is defined in the 2.4 GHz band and operates in around 79 frequencies ranging from 2.402 GHz to 2.480 GHz. Every frequency is GFSK modulated with channel width of 1MHz and rates defined as 1 Mbps and 2 Mbps respectively. ...
Wireless LAN introduction covering technologies such as Spread Spectrum, 802.11a, 802.11b, 802.11g, 802.11n, Direct Sequence Spread Spectrum (DSSS), Frequency Hopping Spread Spectrum (FHSS), Unlicensed National Information Infrastructure (UNII), Wi-Fi Al
跳频展频(Frequency-hopping spread spectrum, FHSS)是展频技术的一种;经由载波快速在不同频率中切换,并在接收与发射端使用一种伪随机(PseudoRandom)的过程。如果频道序列的变换对於潜在对手是未知的,跳频讯号可以非常有效抵御蓄意的干扰。军用无线电使用加密技术,在共享於发送端与接收端之间的传输金钥(Transmission ...
Just wondering if it could make sense to implement a Frequency Hopping mechanism between 2 esp32 connected through ESP-NOW? That is to say changing the wifi channel before each data packet transmission in a known/predifined sequence across the 14 available channels. I made some test, changing ...
Implementation of Matlab Simulation for Frequency-hopping Spread Spectrum System The frequency-hopping spread spectrum technology has stronger anti-jamming ability,and the features of information hiding and multipath interference commun... XH Wang,HT Zhao,XD Guan - 《Modern Electronics Technique》 被引量...
dolphin frequency hopping spread spectrum 您好! 查询到贵公司的一款跳频系统的评估板,Dolphin 评估套件,包含射频板:TRF6903 RF transciever 和数字基带板 the digital baseband ASIC DBB03A。文档中提到如果添加MSP430作为外部控制器即可构成一个跳频系统,进行跳频通信。我是想请问,这款...
use its uniquefrequency hopping spread spectrum(FHSS) probe signal radio transmission technology [...] renishaw.com.br renishaw.com.br 雷尼绍公司推出了使用其创新的跳频(FHSS) 无线电传输技术的全新测头系统,可在各种数控机床上实现自动工件找正和序中测量,在业界又掀起了一轮新的浪潮。