Direct-sequence spread spectrum

Direct-sequence spread spectrum divides a radio signal’s energy over a wide range of frequencies so that a little part of the signal appears on each frequency in the band. Direct sequence spread spectrum systems encode each bit of information with a special code known only to the transmitter and receiver. The transmitter sends these encoded bits over a wide range of frequencies assigned for the system. The receiver looks for the special-coded bits and reassembles them in the proper order.