Software Defined Radio

Software Defined Radio (SDR) Software Defined Radio, which is most commonly shortened to SDR or software radio, is a term that is used to refer to wireless communication where the transmitter modulation is created or defined through a computer [3]. During this process, the receiver utilizes a computer to get the signal intelligence. In addition, SDR can also be described as a radio communication system in which the various components have been ordinarily implemented in hardware.

However, these components are executed through the means of software on an embedded system or a personal computer. In essence, the term refers to a mixture of software and hardware technologies whose radio operating functions are executed by using adjustable firmware or software functioning on programmable processing technologies. Software Defined Radio (SDR) differs from other radio implementation methods in relation to the use of hardware and software technologies. The conventional hardware-based radio devices restrict cross-functionality and can only be adjusted through the use of physical intervention.

This radio implementation method contributes to higher costs of production and limited flexibility in enabling multiple waveform standards. On the contrary, SDR technology enables an efficient and less costly radio implementation method. SDR differs in radio implementation method by allowing combination of hardware and software technologies and enabling multi-mode and multi-functional wireless devices [5]. Software Defined Ratio has numerous benefits for radio equipment manufacturers and system integrators, radio service providers, and end users like business travelers and soldiers on the battlefield.

The benefits of SDR include enhancing system performance, lessening design risk, decreasing system size, and decreasing time to market [4]. This radio solution provides these benefits through promoting the use of available production-ready software and hardware reference radio designs. The other benefits include decreased costs of development and operating expenditures, and ease of communication. SDR is associated with various advantages and disadvantages since the technology has embedded functionality and processed within software modules.

One of the advantages of these systems is the introduction of new methods of intrinsic dynamic flexibility and upgradeability [1]. Secondly, the systems promote a more efficient use of the radio technology spectrum. Actually, by using these radio systems, providers are not restricted to physical backhaul links because segments of the radio spectrum can be used as software-based central base station controllers or wireless backhaul. The other advantages include embracing several communication standards, ability to migrate to new emerging standards, and ability to program through software modules.

On the other hand, the disadvantages of SDR include higher costs because a software defined ratio is more complex as compared to a single-function radio. The second disadvantage is increased power consumption due to high DSP complexity and higher mixed-signal/RF bandwidth. Third, SDR requires more complexity, which contributes to increased cost and time of implementation [2]. Due to its benefits and advantages, SDR is most suited for defense applications, cellular infrastructure systems, cellular handsets, and satellite modems.

Software defined radio seems to be most suited for military applications where its systems are continually used. The suitability of SDR systems for military applications is attributed to the increased need for a unified system in the civil service sector. Civil service agencies like police, emergency response, and fire agencies need common communication linkages, which contributes to the suitability of SDR systems for such applications. The suitability of SDR systems to cellular handsets, satellite modems, and cellular infrastructure systems is attributed to improved communication linkages.

Software Defined Radio engineers basically seek to offer a single radio transceiver with the capability of supporting various roles like cell phone, wireless videoconferencing, wireless e-mail system, GPS unit, pager, wireless fax, and cordless telephone. Therefore, the future of SDR will be characterized by the development of systems with these capabilities that can function in any location across the globe and even in space. The future of SDR will also be characterized by increased development of these systems, particularly hardware and software.

This is primarily because software defined radio is a relatively.