Question: For a PN sequence of length 2 7 - 1 = 127 two possible feedback connections are x 4 x 7 and x 6

For a PN sequence of length 27 - 1 = 127 two possible feedback connections are x4 ⊕ x7 and x6 ⊕ x7.

(a) Draw a block diagram of the feedback shift register for the connection x4 ⊕ x7.

(b) Compute the PN sequence corresponding to the connection x4 ⊕ x7.

(c) Draw a block diagram of the feedback shift register for the connection x6 ⊕ x7.

(d) Compute the PN sequence corresponding to the connection x6 ⊕ x7.

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