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In the given document, the topic discussed is the simulation of Bit Error Rate (BER) for Quadrature Phase Shift Keying (QPSK) in Orthogonal Frequency Division Multiplexing (OFDM) system. The simulation aims to evaluate the performance and reliability of the QPSK modulation scheme in an OFDM system by analyzing the BER. By simulating the BER, we can gain insights into the system's ability to transmit data accurately and efficiently. This simulation involves studying the impact of various factors such as channel conditions, noise, and interference on the BER performance of the QPSK in the OFDM system. By conducting this simulation, we can make informed decisions regarding the design, optimization, and improvement of the QPSK modulation scheme in an OFDM system, leading to enhanced data transmission capabilities and overall system performance.