(1) [Discrete Fourier Transform (DFT) and Inverse DFT (IDFT)] Figure 1 illustrates the fundamental components of...

 

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(1) [Discrete Fourier Transform (DFT) and Inverse DFT (IDFT)] Figure 1 illustrates the fundamental components of the OFDM wireless communication system. In the given MATLAB code, find out the parts of DFT and IDFT, and describe (i.e., copy & past) them in your report. What is the number of subcarrier/subchannel? What is the subcarrier spacing? (2) [Monte-Carlo simulation] For the range of SNR set up in the given MATLAB code, plot Bit error rate (BER) curves for QPSK, 8-PSK, and 16-PSK in ONE plot. Describe the behaviors. (3) [Discussions] Could you find out the parts of D/A, A/D and local oscillators in the MATLAB code? If so, describe them in the report; If not, discuss the reasons. R bps X QAM Modulator →LPF→ A/D cos(2лft) Xo Serial To Parallel Converter XN-1 Remove cyclic prefix & Serial to Parallel Convert IFFT Y YN-1 X₂ XN-1 FFT Add cyclic Prefix & Parallel To Serial Convert Yo YN-1 TX D/A X Parallel To Serial Convert сos(2лf t) --- Fig. 1: Block Diagram for OFDM communication system h(t) n(t) QAM Demodulator Y=H;X;+n; RX R bps (1) [Discrete Fourier Transform (DFT) and Inverse DFT (IDFT)] Figure 1 illustrates the fundamental components of the OFDM wireless communication system. In the given MATLAB code, find out the parts of DFT and IDFT, and describe (i.e., copy & past) them in your report. What is the number of subcarrier/subchannel? What is the subcarrier spacing? (2) [Monte-Carlo simulation] For the range of SNR set up in the given MATLAB code, plot Bit error rate (BER) curves for QPSK, 8-PSK, and 16-PSK in ONE plot. Describe the behaviors. (3) [Discussions] Could you find out the parts of D/A, A/D and local oscillators in the MATLAB code? If so, describe them in the report; If not, discuss the reasons. R bps X QAM Modulator →LPF→ A/D cos(2лft) Xo Serial To Parallel Converter XN-1 Remove cyclic prefix & Serial to Parallel Convert IFFT Y YN-1 X₂ XN-1 FFT Add cyclic Prefix & Parallel To Serial Convert Yo YN-1 TX D/A X Parallel To Serial Convert сos(2лf t) --- Fig. 1: Block Diagram for OFDM communication system h(t) n(t) QAM Demodulator Y=H;X;+n; RX R bps

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OFDM Block Diagram modulated Data serial to parallel converter To Demodulate... View the full answer