COMPUTER FUNDAMENTALS

Detailed explanation-1: -This method is called direct sequence spread spectrum (DSSS)

Detailed explanation-2: -The electromagnetic spectrum is divided according to the frequency of these waves, which are measured in Hertz (i.e. waves per second). Radio waves are typically referred to in terms of: The radio spectrum ranges from low frequency waves at around 10 kHz up to high frequency waves at 100 GHz.

Detailed explanation-3: -The frequency spectrum of an electrical signal is the distribution of the amplitudes and phases of each frequency component against frequency. The use of higher frequencies is desirable because of the smaller antenna size, the improved directional effect of the antennae, and the broader available frequency spectrum.

Detailed explanation-4: -The audio frequency spectrum represents the range of frequencies that the human ear can interpret. Sound frequency is measured in Hertz (Hz) unit. This audible frequency range, in the average person at birth, is from 20Hz to 20000Hz, or 20 kHz. The audio frequency spectrum is also known as sound frequency spectrum.

Detailed explanation-5: -Frequency spectrum of a signal is the range of frequencies contained by a signal. For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/ sin(2ft) + 4A/3 sin(2(3f)t) + 4A/5 sin(2(5f)t + …)