What are the applications and advantages of spread spectrum techniques?

Advantages and applications of spread spectrum

• Spread spectrum signals are highly resistant to the jamming.
• Many users can share a signal band with no interference.
• Unauthorized listening is prevented.
• Unintentional interference occupying the same band is greatly minimized and in most cases virtually eliminated.

What is the importance of spread spectrum?

The main advantage of spread spectrum communication technique is to prevent “interference” whether it is intentional or unintentional. The signals modulated with these techniques are hard to interfere and cannot be jammed. An intruder with no official access is never allowed to crack them.

Where is spread spectrum used?

Spread-spectrum clock generation (SSCG) is used in some synchronous digital systems, especially those containing microprocessors, to reduce the spectral density of the electromagnetic interference (EMI) that these systems generate.

What is the importance of spreading gain in Dsss why it is preferred to have a high value of spreading gain?

DSSS spreading gain It is found that the larger the spreading gain of the direct sequence spread spectrum signal, the more effective the performance of the system is. This is because the wanted signal becomes larger.

What is the advantage of spread spectrum modulation Mcq?

This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Spread spectrum and CDMA”. Explanation: Advantages of spread spectrum are low susceptibility, reduced interference, immunity to jamming and co existence of multi path system.

What is spread spectrum advantages and disadvantages?

Involves low power spectral density since signal is spread over a large frequency band. Disadvantages: Bandwidth inefficient; • Implementation is somewhat complex. Two of the most popular techniques that provide spectrum spreading in a spread spectrum system are direct sequence and frequency hopping.

What are the advantages and disadvantages of spread spectrum techniques?

Advantages, disadvantages and applications of direct sequence spread spectrum (DSSS)

• It has best discrimination against multipath signals.
• It avoids intentional interference such as jamming effectively.
• Performance of DSSS system in presence of noise is better than FHSS system.

What is the importance of spreading gain in DSSS why it is preferred to have a high value of spreading gain?

Why is Direct Sequence Spread Spectrum DSSS the most widely known and the most used of the spread spectrum types?

Why is direct sequence spread spectrum (DSSS) the most widely known and the most used of the spread spectrum types? Its ease of implementation and high data rates.

How does a spread spectrum reduce interference?

Figure 1: In a spread-spectrum system, signals are spread across a wide bandwidth, making them difficult to intercept, demodulate, and intercept. The spread of energy over a wide band, or lower spectral power density, also makes spread-spectrum signals less likely to interfere with narrowband communications.

What is meant by spread spectrum?

Definition(s): Telecommunications techniques in which a signal is transmitted in a bandwidth considerably greater than the frequency content of the original information. Frequency hopping, direct sequence spreading, time scrambling, and combinations of these techniques are forms of spread spectrum.

What is spread spectrum in communication?

Spread spectrum. In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.

Who invented spread spectrum technology?

Probably the most famous developer of spread spectrum technology was the actress Hedy Lamarr, who co-patented a frequency hopping technique in 1942 to prevent radio-controlled torpedoes from being detected and jammed.

What is frequency hopping spread spectrum?

Frequency-hopping spread spectrum (FHSS) transmission is the repeated switching of the carrier frequency during radio transmission to reduce interference and avoid interception. FHSS is useful to counter eavesdropping, as well as to obstruct the frequency jamming of telecommunications and to enable code-division multiple access communications.

What are the technical issues in direct sequence spread spectrum (DSSS)?

There are three technical issues are particularly relevant; frequency allocation, frequency roaming, and frequency interference. In direct sequence spread spectrum (DSSS), the transmitter and receiver contain identical psuedo-random sequence generators producing a pseudo-noise (PN) signal.