Military Embedded Systems

Comms - SDR

SDRs: Solving problems in spectrum management

As wireless technology has gradually become cheaper, its use among the general public has grown. As a result, the amount of signals operating in the radio band increases, causing congestion. Interference can occur due to internal, external, and malicious sources; internal interference is unintentional and caused by an organization’s own devices, while external interference – cochannel or crosstalk, spurious signals, or natural occurrences like solar flares – is out of the organization’s control. The danger from interference arises when the radio-frequency (RF) operations – especially government-regulated bands allocated for defense-related, mission-critical, life-critical, and emergency services – are too full to handle the signals. The solution: Software-defined radios (SDRs), which are capable of enforcing spectrum policy and removing interference from the allocated frequency bands by incorporating a number of suitable strategies.