Plot x[n] = 0.25^n (u[n]) in time domain and frequency domain by matlab.

Answer the following 4 questions with step by step explanations :1. Convert 870678(9) = x(27)2. Convert ABF(16) =x(64)3. Subtract APG(32) - 7RK(32) =4. Multiply BF(16)* AA(16) =

What do you think? The k=n+FCS difference between a dataword (k) and a codeword (n) is significant (Frame Check Sequence).

This question concerns the field GF(256). The modulus is P(x) = x° + x* + x° + x + 1. Please answer the following questions about arithmetic in this field. a) If p(x) = x° + x* + x, what is the corresponding hexadecimal representation? Please prepend an "Ox" on your answer and use lowercase letters (if letters occur). b) If p(x) = x' + x + x² + 1, what is the corresponding hexadecimal representation? Please prepend an "Ox" on your answer and use lowercase letters (if letters occur). c) Consider the hex byte Ox8b. What is the corresponding element of GF(256) (as a polynomial)? d) Consider the hex byte 0x2d. VWhat is the corresponding element of GF(256) (as a polynomial)?

Create a Hamming code (k, n) = (7,4) for the detection and correction of errors in word codes

If true, then Codewords (n) and datawords (k) are dissimilar because k=n+FCS (Frame Check Sequence).