调制方式 Resources

Showing items tagged with "调制方式"

Digital communication systems employ various modulation schemes, with 16QAM being a widely-used quadrature amplitude modulation technique that combines both amplitude and phase keying. This code simulation demonstrates 16QAM constellation diagrams, symbol error rate (SER), and bit error rate (BER), illustrating their interrelationships through MATLAB implementation. The simulation provides practical insights into QAM performance analysis, covering modulation techniques like 32QAM, 64QAM, and 56QAM, making it valuable for understanding digital communication system optimization.

MATLAB 2240 views Tagged
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This study analyzes bit error rates (BER) for 2ASK, 2FSK, 2PSK, and 2DPSK modulation techniques under both coherent and non-coherent demodulation methods in additive white Gaussian noise (AWGN) environments. BER performance is compared with theoretical values and visualized through BER versus signal-to-noise ratio (SNR) curves. Implementation involves Monte Carlo simulations using MATLAB's communication toolbox functions like berawgn for theoretical comparisons and custom modulation/demodulation blocks with error counting algorithms.

MATLAB 296 views Tagged
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Application Background: MATLAB code for calculating Bit Error Rate (BER) of On-Off Keying (OOK) modulation in Visible Light Communication (VLC). Beginners can use this to understand the modulation process in VLC systems and apply it to advanced research. Key Technology: This program implements binary On-Off Keying (OOK), also known as 2-Level Amplitude Shift Keying (2ASK), where unipolar non-return-to-zero codes control the switching of sinusoidal carriers. Despite its inferior noise resistance compared to other modulation schemes (limiting its use in satellite and microwave communications), OOK's simplicity makes it widely adopted in fiber-optic systems and an excellent starting point for studying digital modulation fundamentals. Code implementation includes signal generation, modulation/demodulation processes, and BER calculation algorithms.

MATLAB 356 views Tagged
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This program provides implementations of V-BLAST MIMO system detection algorithms supporting various modulation schemes, including Zero-Forcing (ZF), Minimum Mean Square Error (MMSE), Maximum Likelihood (ML), and Serial Interference Cancellation (SIC) detection algorithms. Excellent resource for beginners with comprehensive code examples and detailed documentation.

MATLAB 232 views Tagged
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This source code implements a comprehensive simulation of OFDM communication system performance. The simulation supports multiple modulation schemes including BPSK, QPSK, MSK, and QAM, and models both AWGN and Rayleigh channels. Additionally, it includes a specialized simulation for IEEE802.11a-compliant OFDM systems with pilot insertion for enhanced performance. The code structure implements key OFDM components such as IFFT/FFT operations, cyclic prefix addition/removal, and channel equalization algorithms.

MATLAB 205 views Tagged
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