- What does jamming mean?
- What is jamming in spread spectrum?
- What is a jamming attack?
- Who invented spread spectrum?
- Does WiFi use spread spectrum?
- How is DSSS signal generated?
- What are the advantages of spread spectrum?
- How do you stop jamming?
- What is processing gain in spread spectrum?
- Should I disable Spread Spectrum?
- What does jamming on the one mean?
- What is anti jamming in communication?
- What is jamming margin?
- Which system allows larger processing gain?
- Why is it called jamming?
What does jamming mean?
Definition of jam (Entry 2 of 4) intransitive verb.
1a : to become blocked, wedged, or stuck fast The line jammed and the boat hung useless.
b : to become unworkable when a movable part becomes blocked or stuck the gun jammed..
What is jamming in spread spectrum?
Jamming is a deliberate attempt to disrupt communication between the transmitter and the receiver. … Since spread spectrum signals are wide, they transmit at a much lower spectral power density, making it less likely to interfere with narrowband communications.
What is a jamming attack?
A jamming attack is the transmission of radio signals that disrupt communications by decreasing the Signal-to-Inference-plus-Noise ratio (SINR) (Berg, 2008). SINR is the ratio of the signal power to the sum of the interference power from other interfering signals and noise power.
Who invented spread spectrum?
Hedy LamarrHedy Lamarr (/ˈheɪdi/), born Hedwig Eva Maria Kiesler (November 9, 1914 – January 19, 2000), was an Austrian-American actress, inventor, and film producer. She was part of 30 films in an acting career spanning 28 years, and co-invented an early version of frequency-hopping spread spectrum.
Does WiFi use spread spectrum?
Currently the most popular and the one most often referred to as WiFi. It operates at 11Mbps but can fall back to lower speeds if conditions are poor. It uses direct spread spectrum transmission in the 2.4GHz band. … It uses the same advanced techniques (OFDM) but in the 2.4GHz band to achieve data rates of 54Mbps.
How is DSSS signal generated?
DSSS uses a signal structure in which the spreading sequence produced by the transmitter is already known by the receiver. The receiver can then use the same spreading sequence to counteract its effect on the received signal in order to reconstruct the information signal.
What are the advantages of spread spectrum?
Advantages of Spread SpectrumCross-talk elimination.Better output with data integrity.Reduced effect of multipath fading.Better security.Reduction in noise.Co-existence with other systems.Longer operative distances.Hard to detect.More items…
How do you stop jamming?
Spread spectrum techniques such as Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS) have been used as countermeasures against jamming attacks. Traditional anti-jamming techniques require that senders and receivers share a secret key in order to communicate with each other.
What is processing gain in spread spectrum?
In a spread-spectrum system, the process gain (or “processing gain”) is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth. It is usually expressed in decibels (dB).
Should I disable Spread Spectrum?
The fundamentals of overclocking demand the cleanest, purest signal possible, which is why spread spectrum should always be disabled unless you have a good reason to enable it.
What does jamming on the one mean?
On an episode of The Cosby Show, Stevie Wonder asked Theo Huxtable what he would say if he was at a party. His answer was “Jammin on the one”. But what does it mean? A recent answer on Yahoo Answers states: “It’s a funk reference.
What is anti jamming in communication?
Radio jamming is the deliberate jamming, blocking or interference with authorized wireless communications. … In some cases jammers work by the transmission of radio signals that disrupt communications by decreasing the signal-to-noise ratio. The concept can be used in wireless data networks to disrupt information flow.
What is jamming margin?
jamming margin: The level of interference (jamming) that a system is able to accept and still maintain a specified level of performance, such as maintain a specified bit-error ratio even though the signal-to-noise ratio is decreasing. [
Which system allows larger processing gain?
Explanation: Frequency hopping spread spectrum system allows greater processing gain than direct sequence spread spectrum technique.
Why is it called jamming?
Jazz. One source for the phrase “jam session” came about in the 1920s when white and black musicians would congregate after their regular paying gigs, to play the jazz they could not play in the “Paul Whiteman” style bands they played in. … Thus these sessions became known as “jam sessions”.