Consider the following signal encoding technique. Binary data are presented as input, am, for m = 1, 2, 3, .… Two levels of processing occur. First, a new set of binary numbers are produced:

b0 = 0 bm = 1am + bm-12mod 2 These are then encoded as cm = bm - bm-1 On reception, the original data are recovered by am = cm mod 2

a. Verify that the received values of am equal the transmitted values of am.

b. What sort of encoding is this?