Software-Defined Radio (SDR)
Software-defined radio (SDR) provides software control of significant parts of a wireless function rather than through traditional hardware control. This allows devices to switch dynamically between protocols and frequencies under software control. SDR is most attractive where standards are changing and uncertain, or where multiple standards are required. Smart antennas are an important part of SDR and are typically implemented as an array of elements with programmable characteristics such as field width, frequency and waveform shape.
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