0
slow frequency hopping (SFH) technology.
The difference
between slow frequency hopping and fast frequency hopping is that the frequency of latter changes faster than frequency modulation
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why frequency hopping is used?
TSK
What is frequency hopping in gsm?
Multi wave propagation varies the signal strength which causes fading dips. This is known as Rayleigh fading which is frequency dependent. Frequency Hopping changes the frequency with time to eliminate frequency dependent Rayleigh fading. Frequency Hopping reduces the effects of interferences and gives a great support to cater the capacity upgrading as well.
Working of frequency hopping spread spectrum?
exlanation of fhss block diadram
What is the signaling method used by Bluetooth?
FHSS(Frequency Hopping Spread Spectrum)
What famous entertainer was presented an Electronic Frontier Foundation for invention of frequency hopping?
Hedy Lamarr
What do you mean by Antenna Hopping in GSM?
Antenna hopping is a feature in which the Tx/Rx is passed through all the available antenna paths in a sector. No frequency is changed during antenna hopping. This helps improve performance by providing spatial diversity.
Difference between Frequency hopping spread spectrum and direct sequence spread spectrum?
Spelling difference.... :)
What feature does the SINCGARS use to reduce the threat of jamming and minimize the use of direction-finding equipment to establish your location?
SINCGARS radio's frequency hopping covering the 30 to 87.975 MHz band in 2,320 channels. Older direction-finding equipment that use a conventional receiver channel will have trouble direction-finding a frequency hopping radio, but direction-finders sets that use what amounts to a spectrum analyzer can DF a frequency hopping radio, and probably can de-interleave a number of them, so the anti direction-finding part of the reason for frequency hopping is not too strong. Note that SINCGARS uses about 100 hops per second, which is considered a slow hop. It is not a direct sequence spread spectrum system like is used by GPS. Once a frequency hopping radio has been located by direction-finding equipment then it's possible to jam it. Not by knowing the hop sequence, but by listening for each new transmission (like using a very fast spectrum analyzer) and then jamming that transmission, then the next, and so on. So the advantage of Frequency Hopping against a sophisticated enemy has a short life.
Frequency and cumulative frequency are two types of what?
Frequency and cumulative frequency are two types of frequency distributions. These are frequency tables that show statistical data for different types of frequencies that include absolute, relative, and cumulative frequencies. There are mathematical formulas used to calculate these frequencies.
Frequency and cumulative frequency are two types of?
Tables
What is the frequency blue tooth runs on?
Bluetooth technology operates in the unlicensed industrial, scientific and medical (ISM) band at 2.4 to 2.485 GHz, using a spread spectrum, frequency hopping.
Are gsm use sfh to improve signal?
Frequency Hopping is an old technique introduced firstly in military transmission system to ensure the secrecy of communications and combat jamming. Frequency Hopping is mechanism in which the system changes the frequency (uplink and downlink) during transmission at regular intervals. It allows the RF channel used for signaling channel (SDCCH) timeslot or traffic channel (TCH) timeslots, to change frequency every TDMA frame (4.615 ms). The frequency is changed on a per burst basis, which means that all the bits in a burst are transmitted in the same frequency.
