SINADR

Signal-to-noise and distortion ratio (SINADR^[1]) is a measurement of the purity of a signal. SINADR is typically used in data converter specifications. SINADR is defined as:

\mathrm {SINADR} ={\frac {P_{\mathrm {signal} }}{P_{\mathrm {quantizationError} }+P_{\mathrm {randomNoise} }+P_{\mathrm {distortion} }}}

where $P$ is the average power of the signal, quantization error, random noise and distortion components. SINADR is usually expressed in dB. SINADR is a standard metric for analog-to-digital converter and digital-to-analog converter.

SINADR (in dB) is related to effective number of bits (ENOB) by the following equation:

\mathrm {SINADR} =ENOB\cdot 6.02+1.76

References

^ Lavrador, P.M.; Borgesdecarvalho, N.; Pedro, J.C. (March 2004). "Evaluation of signal-to-noise and distortion ratio degradation in nonlinear systems". IEEE Transactions on Microwave Theory and Techniques. 52 (3): 813–822. Bibcode:2004ITMTT..52..813L. doi:10.1109/TMTT.2004.823543. ISSN 0018-9480.

References

See also