跳频扩频(Frequency-hopping spread spectrum) (FHSS) 是一种通过在占据大频谱带的多个频率之间快速改变载波频率来传输无线电信号的方法。这些变化由发射器和接收器都知道的代码控制。FHSS 用于避免干扰、防止窃听和实现码分多址(code-division multiple access) (CDMA) 通信。 频带被划分为较小的子带。信号以确定的...
跳频技术 (Frequency-Hopping Spread Spectrum;FHSS)在同步、且同时的情况下,接受两端以特定型式的窄频载波来传送讯号,对于一个非特定的接受器,FHSS所产生的跳动讯号对它而言,只算是脉冲噪声。FHSS所展开的讯号可依特别设计来规避噪声或One-to-Many的非重复的频道,并且这些跳频讯号必须遵守FCC的要求,使用75个以上的跳...
frequency hopping spread spectrum 读音:美英 基本释义 调频扩频;技术;跳频扩频;跳频扩谱;跳频技术 分词解释 frequency频繁性 hopping卖力的,忙碌的v. 跳上[下]( hop的现在分词 ) spread& vi. 伸开 spectrum光谱 frequency hopping spread spectrum是什么意思 frequency hopping spread spectrum怎么读 frequency hopping ...
Adaptive frequency-hopping spread spectrum (AFH) AFH is used in Bluetooth wireless technology to improve resistance toradio frequencyinterference by circumventing high-traffic frequencies in the hopping sequence. This type of adaptive transmission is simpler to implement with FHSS than with DSSS. Chirp ...
Frequency-hopping spread-spectrum techniques are utilized in which the transmitter of the message assigns a message a priority. Once the message is assigned the priority, the transmitter then selects one of the frequencies from a set of pre-determined randomly-ordered set of frequencies utilized by...
What Are the Challenges of Frequency Hopping Spread Spectrum Technology? Spread-spectrum communications need greater bandwidth than when only a single carrier frequency is used. Also, one of the most problematic aspects of the technology is to initially synchronize the transmitter and receiver. Although...
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。
A quick overview of each technology.Frequency Hopping Spread Spectrum (FHSS): derived from military radio technology where it was designed to be inherently secure and reliable under adverse battle conditions. Divides the available 83.5 MHz spectrum (in most countries) into 79 (or 75) discrete 1 ...
Frequency hopping spread spectrum is a robust technology with only very little influence from reflections, noise and other environmental factors. The active system numbers in same geographical areas is higher than an equivalent number for direct sequence spread spectrum systems. Thus it is suited well...
1 扩频通信的论文翻译Frequency Hopping Spread Spectrum (FHSS) vs. Direct Sequence Spread Spectrum (DSSS)in Broadband Wireless Access (BWA)and Wireless LAN (WLAN) by Sorin M. SCHWARTZ Director, Training & Documentation Scope In 1997 IEEE defined the 802.11 Wireless LAN (WLAN) standard, intended to...