A direct sequence spread spectrum (DSSS) system in a wireless local area network (WLAN) uses the Barker or PN code, where n is 11 chips as shown in the figure below. Assume that the data signal and the PN code signal in the chip generator use polar NRZ encoding, where the positive voltage represents bit 1. Find the encoded chip sequence and draw both the code signal and the spread signal.
A DSSS receiver uses the PN code with the chipping rate of 11 chips per bit and the polar NRZ encoding, where the positive voltage represents bit 1. The figure below displays the PN code and the received signal. Based on this information, find the received bit sequence.