Howtosignalprocessing
- How does spread spectrum overcome narrow band interference?
- What is narrow band interference?
- Which technique can effectively reject narrowband interfaces?
- What are the main benefits of a spread spectrum system how can spreading be achieved?
How does spread spectrum overcome narrow band 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 narrow band interference?
NBI (narrowband interference) and WBI (wideband interference) refers to the source of the interference, and whether its bandwidth (or spectral width) is narrow or wide.
Which technique can effectively reject narrowband interfaces?
CDMA is also resistant to jamming. A jamming signal only has a finite amount of power available to jam the signal. The jammer can either spread its energy over the entire bandwidth of the signal or jam only part of the entire signal. CDMA can also effectively reject narrow-band interference.
What are the main benefits of a spread spectrum system how can spreading be achieved?
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.
