Abstract
In recent years, much attention has been paid to software-defined radio (SDR) technologies for multimode wireless systems. SDR can be defined as a radio communication system that uses software to modulate and demodulate radio signals. This article describes concepts, theory, and design principles for SDR down-conversion and up-conversion. Design issues in SDR down-conversion are discussed, and two different architectures, super-heterodyne and direct-conversion, are proposed. Design issues in SDR up-conversion are also discussed, and trade-offs in the design of filters, mixers, NCO, DAC, and signal processing are highlighted.
| Original language | English |
|---|---|
| Pages (from-to) | 10-14 |
| Journal | ZTE Communications |
| Volume | 9 |
| Issue number | 4 |
| Publication status | Published - 1 Dec 2011 |
Keywords
- direct-conversion
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