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A digital link is required to achieve a symbol rate Rs of 1 Msymbols/s.



A digital link is required to achieve a symbol rate Rs of 1 Msymbols/s.


 (a) What is the minimum required band width for zero-ISI transmission? What is the roll-off factor in this case, considering raised cosine filtering? 

Draw a rough graph of the raised cosine spectrum H(D) that satisfies the requirements. 


(b) Given the bandwidth of 800 kHz. What is the roll-off factor? Draw a rough graph of the raised cosine spectrum H(f) in this case.

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