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(b) The achievable signal to quantisation noise power ratio (SQNR) of a DSP system is 61.96 dB using a B-bit ADC. A 2nd
Posted: Sun May 15, 2022 2:38 pm
by answerhappygod
- B The Achievable Signal To Quantisation Noise Power Ratio Sqnr Of A Dsp System Is 61 96 Db Using A B Bit Adc A 2nd 1 (50.65 KiB) Viewed 60 times
(b) The achievable signal to quantisation noise power ratio (SQNR) of a DSP system is 61.96 dB using a B-bit ADC. A 2nd order Butterworth anti-aliasing filter is to be designed for the DSP system. Determine the minimum value of B. If the corresponding minimum sampling frequency, Fs, is 30.87 KHz, determine the cut-off frequency and the level of aliasing error relative to the signal level at the passband. Include any assumptions you have made in your calculation. (12 marks] Note: A 2nd order Butterworth filter has the following characteristic equation: 2n -1/2 F H(F)= 1+ where n=2 and F. is the cut-off frequency. Fc (c) In an orthogonal frequency division multiplexing (OFDM) system, if the number of points for the IFFT is 96 and each subcarrier can carry 2 bits per symbol, calculate the data bits per symbol if the coding rate is 2/3. [2 marks]