WLAN Simulation - Transmitter wlan: After setting system parameters, the process generates transmission data through the following steps: 1. Generate random transmission bits (tx_bits) without channel coding, 2. QAM modulation mapping, 3. OFDM symbol formation by mapping data to subcarriers, 4. Pilot insertion into OFDM symbols, 5. DC and guard subcarrier addition, 6. IFFT conversion to time-domain with cyclic prefix, 7. Overlap window processing, 8. Short preamble generation in time-domain, 9. Long preamble generation in time-domain, 10. Packet assembly with preambles.
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