Benefits of Modulation in Telecommunication

Modulation for efficient transmission

                                                         

                      Signal transmitting over appreciable distance always involves a traveling electromagnetic wave. The efficiency of any particular transmission method depends upon the frequency of the signal being transmitted. By exploit in the frequency translation property of modulation the message can be inserted into carrier which has the frequency selected for the desired transmission method.

Modulation to overcome hardware limitation

                                             

                      The design of the communication may be constrict by the cost availability of the hardware, performance of the hardware often depends on the frequencies involved. Modulation permits that designer to place a signal in some frequency range that avoids the hardware limitation.

Modulation to reduce noise and interferences

                      A method for overcoming noise and interferences is to increase signal power until it overcomes the contamination. But increasing power is costly and may damage the equipments. Fortunately FM and certain other types of modulations have a valuable property of suppressing both noise and interferences.

Modulation for frequency assignment

                      When we tune a radio or television, particular station we are selecting one of the many signals being received at that time. Since each station has a different assigned carried frequency that desired signal can be separated from the others by filtering.

    Throughout this article I hope you may get some thing. This provides very basic explanation and future will cover more. Comments are well come. Thank you.