Explore MATLAB source code curated for "可见光通信" with clean implementations, documentation, and examples.
Describes a visible light communication system utilizing LED technology with receiver-side equalization for improved data rates. Provides spatial distribution maps for bit error rate and signal-to-noise ratio, demonstrating system performance optimization through digital signal processing techniques.
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.
This code calculates indoor light intensity distribution for visible light communication applications. It has been thoroughly tested and validated for reliability. The implementation includes ray-tracing algorithms and photometric calculations to model light propagation in indoor environments.
Simulation of visible light communication systems with multi-reflection analysis, corresponding to the research article "Improvement of data rate by using equalization techniques"
Single-Input Single-Output (SISO) DCO-OFDM code for Visible Light Communication (VLC) systems based on DC-biased OFDM methodology. The core implementation involves converting bipolar OFDM signals to unipolar signals by adding a DC bias (BDC) using the transformation x(t) = X₀(t) + BDC, followed by clipping operations. Key implementation challenges include managing clipping noise caused by Gaussian-distributed signal peaks and optimizing BDC selection to balance between linear modulation range and noise performance. Critical algorithmic considerations involve power management, signal distribution analysis, and clipping level calculations relative to subcarrier count.
Bit error rate analysis for visible light communication systems using OOK-NRZ modulation - personally validated through simulation with reliable results
Simulation of power distribution patterns at both transmitter and receiver ends in visible light communication systems, with code implementation insights.