Digital Communication Systems and Wireless LANs Assignment Solution

This assignment solution covers various aspects of digital communication systems. It begins with the conversion of binary data into analog waveforms using different modulation techniques such as ASK, FSK, PSK, DPSK, and QAM. The solution then computes frequency assignments for 16-level FSK. It includes the drawing of analog and frequency modulation waveforms, and also the 16 QAM constellation diagram. The solution explains the Cyclic Redundancy Check (CRC) error detection process and computes the frame check sequence. Furthermore, it analyzes Direct Sequence Spread Spectrum (DSSS) and compares the differences between infrastructure and ad hoc modes in WLAN, including their respective diagrams. Finally, it compares the differences between TCP and OSI protocols for wired and wireless LANs. The assignment provides a comprehensive overview of key concepts in digital communications and networking.