正交频分复用 Resources

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This simulation module implements a frequency hopping system using Orthogonal Frequency Division Multiplexing (OFDM) modulation, built with Simulink toolbox. The system allows dynamic configuration of key parameters including hopping rate, number of frequency hops, carrier frequency, hopping interval, FFT operation length, and cyclic prefix length. Channel models support both Rayleigh multipath fading and Gaussian channels with customizable parameters. The implementation utilizes Simulink's DSP and Communications toolboxes for signal processing blocks and OFDM modulation/demodulation components.

MATLAB 248 views Tagged
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Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier broadband digital modulation technique. Compared with conventional digital communication systems, it offers advantages such as high spectral efficiency and strong resistance to multipath interference, making it suitable for high-speed wireless communication systems. Implementation typically involves IFFT/FFT algorithms for efficient parallel data transmission across orthogonal subcarriers.

MATLAB 221 views Tagged
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This paper analyzes the effects of phase noise on OFDM systems, revealing that phase noise induces both Common Phase Error (CPE) and Inter-Carrier Interference (ICI), significantly degrading system performance. To address these issues, we propose a CPE correction method based on the Mean Squared Error (MSE) criterion and an adaptive ICI cancellation technique using the Least Mean Squares (LMS) algorithm, which leverages the dominant interference from adjacent subcarriers. The implementation involves calculating CPE compensation factors through pilot symbol analysis and applying LMS-based adaptive filtering to mitigate adjacent-channel ICI. Simulation results demonstrate that our computationally efficient algorithm substantially enhances OFDM performance.

MATLAB 267 views Tagged
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