Signal Transmission Assignment Example | Topics and Well Written Essays - 2500 words

Signal Transmission - Assignment Example The length of the antenna should be more or equal to the wavelength. In order to transmit higher wavelength frequency, the length of the antenna should be larger that become unpractical. In order to limit the size of the antenna, carrier frequencies are used that have powerful signal frequencies. Carrier frequencies make it possible to send and receive the radio waves under a set operating range. It limits the distortion and interference with other frequencies. Carrier frequencies allow the transmission of the signal frequencies to be transmitted wirelessly. Radio waves require carrier frequencies for the transmission as carrier frequencies make it easier to transmit the information through space. Carrier frequencies work in a fixed band where the power transmitted through the carries is considerably higher as compared to that of the packed radio frequencies. Carrier frequencies are transmitted by using a similar physical transmission medium. Signal frequencies and carrier frequencie s are modulated in a manner that the receiver can easily separate the two frequencies. Mainly two basic modulation techniques are used for the transmission of the carrier frequencies. Frequencies modulation and amplitude modulation are the basic types of modulation techniques used extensively. In frequency modulation, the signal frequencies are mixed with the frequency of the carrier frequency and in amplitude modulation techniques, the signal frequencies are mixed with respect to the amplitude of the carrier frequency.