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Take Test: Week Four Fin x ttps://nu.blackboard.com/webapps/assessment/take/launchjsp?course assessment ida 137225 18course id- 54719 18content id 3932108 18stepenu webManager l Log in ac DealerCenter Dealer ALTONIQ Autocheck vehicle Hi Bookmarks CAREAxa For Deale Nationa University Other bookmarks 16 points i Save Answer QUESTION 11 The following system is used for 8any orthogonal coding. m ym m r mamma, 8ary Orthogonal Code Generator 8 bit code The encoding algorithm takes the 3 message bits and coverts it to the 8 bit orthogonal code that corresponds to the row number identified by the message bits. If t denotes the number of errors that can be detected and e the number of errors that can be corrected, which of the following is correct? t-4, e 3 t 3, e-2 t-4, e-2 16 points Save Answer QUESTION 12 Which statement is true Convolutional encoders are block encoders convolutional encoders have the best error performance when channel is AWGN The length of the convolutional encoder does not impact the performance of the encoder The rate of the convolutional encoder does not impact the performance of the encoder Click Save and submit to save and submit. Click Save AllAnswers to save all answers. save and submit Save All Answers 1:17 AM EN 5/24/2017

Explanation / Answer

For orthogonal codes there are specific formulas for no. Of errors can be detected and corrected , given below

Suppose, n is code word length , in our case n=8

No. Of detectable error=(n/2)+1=(8/4)+1=3

Hence,t=3

No. Of correctable errors=(n/4)-1 =(8/4)-1=1

Hence e= 1,

There fore , option 4 ) where t=3 and e=1 is the right answer .

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