ASN9 - 3rd Harmonic & QSD

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Explain Third Harmonic and Quadrature Sampling

Third Harmonic Sampling

$\sum _{n=1}^{\infty }{\frac {1}{n}}cos(n\omega t)=cos(\omega t)+{\frac {1}{2}}cos(2\omega t)+{\frac {1}{3}}cos(3\omega t)+{\frac {1}{4}}cos(4\omega t)+\cdots$

Third harmonic sampling is used in some applications, such as the SoftRock-40 software defined radio, to divide the local oscillator frequency by three.

Further information on Third Harmonic Sampling Soft Rock

Quadrature Sampling Further information on Quadrature Sampling SDR-1000 QEX