A voice signal is bandlimited by an anti-aliasing filter to 3.4 kHz before being (b) linearly quantised and converted into a PCM (Pulse Code Modulation) signal. () What is the function and effect of the anti-aliasing filter? (ii) What would be a suitable minimum sampling rate? (iii) What is the minimum PCM bit rate required to achieve a signal to quantisation noise ratio of greater than 55 dB? (iv) Assuming a raised cosine channel is used for transmission of the PCM signal, with a roll-off factor of 0.32, determine the required channel bandwidth.
A voice signal is bandlimited by an anti-aliasing filter to 3.4 kHz before being (b) linearly quantised and converted into a PCM (Pulse Code Modulation) signal. () What is the function and effect of the anti-aliasing filter? (ii) What would be a suitable minimum sampling rate? (iii) What is the minimum PCM bit rate required to achieve a signal to quantisation noise ratio of greater than 55 dB? (iv) Assuming a raised cosine channel is used for transmission of the PCM signal, with a roll-off factor of 0.32, determine the required channel bandwidth.
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![(b)
A voice signal is bandlimited by an anti-aliasing filter to 3.4 kHz before being
linearly quantised and converted into a PCM (Pulse Code Modulation) signal.
(i) What is the function and effect of the anti-aliasing filter?
(ii) What would be a suitable minimum sampling rate?
(iii) What is the minimum PCM bit rate required to achieve a signal to
quantisation noise ratio of greater than 55 dB?
(iv) Assuming a raised cosine channel is used for transmission of the PCM
signal, with a roll-off factor of 0.32, determine the required channel
bandwidth.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fadad6fb5-3ea5-460f-946e-4a9df892085f%2Fd4891d88-cde0-4043-b423-c2dbf022a3df%2Frsqocm9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(b)
A voice signal is bandlimited by an anti-aliasing filter to 3.4 kHz before being
linearly quantised and converted into a PCM (Pulse Code Modulation) signal.
(i) What is the function and effect of the anti-aliasing filter?
(ii) What would be a suitable minimum sampling rate?
(iii) What is the minimum PCM bit rate required to achieve a signal to
quantisation noise ratio of greater than 55 dB?
(iv) Assuming a raised cosine channel is used for transmission of the PCM
signal, with a roll-off factor of 0.32, determine the required channel
bandwidth.
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