CCK

The Complementary Code Keying (CCK) modulation scheme is a sophisticated digital modulation technique employed in wireless communication, particularly in 802.11b802.11b: The 802.11b WiFi Standard, also known as "WiFi 1", was adopted in September 1999 and operated on a 2.4 GHz frequency band. The standard offers a maximum theoretical bandwidth of 11 Mbps, although in practice, the actual data transfer speed is typically less than 6 Mbps. The 802.11b standard… Wi-Fi standards. This technique enhances data rates and improves the efficiency of wireless communication. CCK modulation utilises a set of eight complex code words, each representing a unique sequence of chips. These code words are designed to be orthogonal to each other, ensuring minimal interference and cross-talk. This orthogonality allows for the simultaneous transmission of multiple signals over the same channel, thereby increasing the data rate. In a CCK modulation scheme, data bits are grouped, and each group is mapped to a specific code word. These code words are then transmitted over the wireless channel. At the receiver end, the received signal is correlated with the known code words to decode the transmitted data. This modulation scheme is highly effective in mitigating the effects of multipath fading, a common issue in wireless communication. The inherent redundancy in the code words allows for error detection and correction, thereby improving the reliability of the communication.