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Showing posts with the label RF carrierDirect sequence systems

What Spread Spectrum Does?

 What Spread Spectrum Does? The use of these special pseudo noise codes in spread spectrum (SS) communications makes signals appear wide band and noise-like. It is this very characteristic that makes SS signals possess the quality of Low Probability of Intercept. SS signals are hard to detect on narrow band equipment because the signal’s energy is spread over a bandwidth of maybe 100 times the information bandwidth. A spread spectrum system is one in which the transmitted signal is spread over a wide frequency band, much wider, in fact, than the minimum bandwidth required to transmit the information being sent. Spread spectrum communications cannot be said to be an efficient means of utilizing bandwidth. However, it does come into its own when combined with existing systems occupying the frequency. The spread spectrum signal being “spread” over a large bandwidth can coexist with narrow band signals only adding a slight increase in the noise floor that the narrow band receivers see.