This assignment solution addresses several key concepts in electronics and wireless communication. It begins by differentiating between infrastructure and ad hoc modes in WLAN, including diagrams. The solution further explores various modulation techniques, including Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), and Differential Phase Shift Keying (DPSK), along with their application to binary and multi-level data. It computes frequency assignments for different data combinations and draws analog modulation and frequency modulation waveforms. The solution also includes the creation of a 16 QAM constellation diagram and an explanation with a drawing of the Cyclic Redundancy Check (CRC) error detection process. Additionally, it computes the frame check sequence for a given message and pattern, and the transmitted signal using Direct Sequence Spread Spectrum (DSSS). Finally, the document provides references to relevant research papers.
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