wireless communication tutorial

One desirable feature of radio transmission is that it should be carried without wires (i.e.,) radiated into space. At audio frequencies, radiation is not practicable because the efficiency of radiation is poor. However, efficient radiation of electrical energy is possible at high frequencies (>..

Basic Principles of Wireless Radio Communication - Let us now discuss the basic principles of wireless radio communications. We shall mainly concentrate on the principle of amplitude modulation and demodulation. The simplest scheme of wireless ..

It is an intraspecific cooperative interaction, in which activity of an individual is influenced by some behaviour of another individual. It is a means of exchange of information among the members of the species. Informatory signals may be visual, auditory, chemical and tacti..

Communicable Diseases - Communicable diseases are caused by the entry and development of living organisms such as virus, bacteria, protozoans, worms or fungi into the body. The organism causing the disease may be transmitted from one person to another by means of air, water, foo..

Communication satellites are normally geostationary satellites. They have devices called transponder which receive signals from an earth station and transmit them in different directions. The signals in the form of electromagnetic radiation are transmitted from the earth station and these..

Communicable diseases are caused by the entry and development of living organisms such as virus, bacteria, protozoans, worms or fungi into the bod..

Communicable Diseases - These are diseases caused by the entry and development of living organisms such as virus, bacteria, protozoans, worms or fungi into the body. The organism causing the disease may be transmitted from one person to another by means of air, water, food, physical conta..

These are diseases caused by the entry and development of living organisms such as virus, bacteria, protozoans, worms or fungi into the body. The organism causing the disease may be transmitted from one person to another by means of air, water, food, physical contact and insects (vectors). The foll..

Satellite Communication - It is mainly done through geostationary satellites. These satellites are fitted with special devices. These devices can receive signals from an Earth station and transmit them again in different directions. These special devices are called transponders. A TV tran..

Disease Mode of Transmission Symptom Prevention Control Malaria Caused by protozoan Plasmodium through the bite of the female anopheles mosquito High fever, rigours which is repeated on the 3rd or 4th day Prevent mosq uitoes from biting and prevent them from breeding A quinine der..