Figure 1.12 shows how a single direct sequence spread spectrum communication channel can have several channels. In this example, there are 3 different code patterns that are used for communication ...

DSSS multiplies the data bits by a very fast pseudo-random bit pattern (PN sequence) that "spreads ... basis for CDMA cellphones and 802.11 Wi-Fi wireless transmission. For a technical example ...

Known as "pseudo-random noise codes," Walsh codes are used in direct sequence spread spectrum (DSSS) systems such as Qualcomm's CDMA. They are also used in frequency hopping spread spectrum (FHSS ...