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3.10: SDR Summary

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    The software defined radio described in this chapter used two stages of quadrature modulation in the SDR transmitter and two stages of quadrature demodulation in the SDR receiver. Each of the quadrature modulators and demodulators used ideal multipliers to multiply signals by an LO signal. There are other ways of implementing quadrature de/modulators but the principles of one stage of the quadrature modulator being implemented in a baseband DSP unit and the final analog RF modulator being analog; and one of the quadrature demodulator being analog and operating on the RF signal and the second stage quadrature demodulator being implemented in DSP operating on an intermediate frequency signal is essential to implementations of SDR.

    This page titled 3.10: SDR Summary is shared under a CC BY-NC license and was authored, remixed, and/or curated by Michael Steer.

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