Howtosignalprocessing
- How do spread spectrum systems reduce the effect of fading?
- What is spread spectrum system?
- How can DSSS systems benefit from multipath propagation?
- What are the 3 varieties of spread spectrum?
How do spread spectrum systems reduce the effect of fading?
In the spread spectrum technique, the frequency of the signal to be transmitted is varied by injecting pseudo-random noises into it. This injection increases the bandwidth of signal transmission, and thereby reduces the effects of interference, noise, and signal fading.
What is spread spectrum system?
Spread Spectrum refers to a system originally developed for military applications, to provide secure communications by spreading the signal over a large frequency band. Figure 1 represents a narrow band signal in the frequency domain. These narrowband signals are easily jammed by any other signal in the same band.
How can DSSS systems benefit from multipath propagation?
(c) How can DSSS systems benefit from multi-path propagation? (3 points) DSSS systems typically use rake receivers that recombine signals travelling along the different paths. Recombina- tion results in a stronger signal compared to the strongest signal only.
What are the 3 varieties of spread spectrum?
Frequency-hopping spread spectrum (FHSS), direct-sequence spread spectrum (DSSS), time-hopping spread spectrum (THSS), chirp spread spectrum (CSS), and combinations of these techniques are forms of spread spectrum.
