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Spread Spectrum is a wireless communication technology that distributes the transmitted signal across a larger bandwidth than the original signal. This approach improves communication security and dependability by increasing the signal’s resistance to interference, eavesdropping, and jamming.
Spread spectrum systems spread a signal over a wider frequency band than the original message while transmitting at the same signal power, making it harder to intercept or jam. This tutorial covers an introduction to RF, wireless and high-frequency signals and systems.
Spectral plots illustrate direct-sequence spread-spectrum (DSSS) and frequency-hopping spread-spectrum (FHSS) methods. As spread-spectrum techniques become increasingly popular, electrical engineers outside the field are eager for understandable explanations of the technology.
Spread spectrum techniques are commonplace in switch mode controllers and converters, and serve the purpose of reducing the effect of electromagnetic interference (EMI) that switchers generate.
How does spread spectrum work? Spread spectrum uses wideband, noise-like signals that are hard to detect, intercept, or demodulate. Additionally, spread-spectrum signals are harder to jam (interfere with) than narrow band signals.
Spread spectrum is a technique used for transmitting radio or telecommunications signals. The term refers to the practice of spreading the transmitted signal to occupy the frequency spectrum available for transmission.
We can spread a spectrum, then, by incorporating higher frequencies into the baseband signal. But how do we accomplish this without changing the baseband information? The solution is something called a spreading sequence, also known as a pseudo-noise (PN) code or a pseudo-random-noise (PRN) code.
Spread-spectrum (SS) technology uses a sequential noise-like signal to spread the normally narrowband information signal over a relatively wide band of radio frequencies. The receiver correlates the received signals to retrieve the original information signal.
It is the intention of this paper to provide a tutorial treatment of the theory of spread-spectrum communications, including a discussion on the applications referred to above, on the properties of common spreading sequences, and on techniques that can be used for acquisition and tracking.
Direct Sequence Spread Spectrum (DSSS) is a communication system that was developed in the 1980s. It divides the bandwidth of a radio channel into wide frequency bands and transmits these signals over separate frequencies. In this frequency-hopping process, each signal is assigned a different orthogonal sequence of frequencies.