02/12/2019
Software Defined Radio
Large amount of data is transmitted through the entire earth every day. There are different types of communications such as data communications, video communications, voice communications, broadcast messaging, etc. To modify the radio devices cost effectively is really critical. The Software Defined Radio (SDR) technology is a flexible, cost efficient technology having lot of advantages. It is also called software radio. It is a radio communication system based on software defined wireless communication protocol. Instead of using components in hardware such as mixers, amplifiers etc.the software defined radio uses a software on embedded or computer system.
Software Defined Radio consists of a personal computer which includes sound card, analog to digital converter, a general purpose processor for signal processing. In this radio,the transmission and reception is based on the software used. For selecting a particular modulation, a proper program must run in the microcontroller which controls the transmitter and receiver. In this,some or all physical layer is software defined. This software is used to determine all the specifications of radio. It also determines what it does. If any changes occur in the software, the performance of radio also gets changed. The software provides functions such as modulation, demodulation, filtering, frequency selections etc. Wireless system protocols are different in each country. The single Software Defined Radio set can be used anywhere in the world. By simply selecting and changing the computer program, the service type, modulation protocol etc. can be changed. Before portable operation has done, make sure that the battery is fully charged.