Assume that a direct sequence spread spectrum system uses the Barker code of length 7 (N=7) as its spreading sequence. a. Randomly generate 8 symbols (d0~d7) from the set {+1,-1}. b. If each chip of the Barker code is denoted as cj, j=0~6, spread each symbol di by the Barker code. (Please refer to p. 17 of the slides.) Use “stem” to plot the signals before spreading and after spreading

Direct_sequence_spread_spectrum\ab_3.m
...............................\after spreading.fig
...............................\a_1.m
...............................\a_2.m
...............................\before spreading.fig
...............................\b_1.m
...............................\rx_non_syn.fig
...............................\rx_syn.fig
Direct_sequence_spread_spectrum

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