Digital Signal Processing: Its Ever-Growing Role in Communications

DIgital signal processing (DSP) is an important part of modern communications systems, and its role is growing. The functions of DSP have grown from its first applications in audio processing and coding to full IF filtering, modulation/demodula-tion, encoding/decoding, and system control functions. DSP also has seen increased use in amplifier lin-earization systems, in both “analog” feedforward and digital predistortion methods. The devices used have benefitted from the overall improvement in semicon-ductor processes, with smaller geometries for higher density and lower power consumption, plus higher speeds to handle inputs at higher frequencies.
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