I remember that some of my colleagues had really tough time figuring out what is the sampling rate of a rolling shutter camera since camera producers never ever shown the value! We are not talking about the frame rate of camera if you are missing understanding. The reason was quite understandable, because the sampling rate … Continue reading FREE Software to measure the sampling rate of rolling shutter cameras!
This implementation of Neural Network (NN) programmed in Python + Labview shows the feasibility of Artificial Intelligence (AI) assisted Decoder, particularly in our OWC system. In this post, some idea of NN is disclosed, and some piece of implementation results are provided for explanation. In general, NN is very helpful for our OWC if it … Continue reading Neural Network for Optical Wireless Communication
This is a small implementation prepared for our proposal in applying light communication to e-Health. I prepared this demo within a very short time (nearly three weeks) just to test the feasibility of LiFi in transmitting biomedical signal (i.e., ECG). Our demo illustrated that the requirement of communication bandwidth for transmitting the ECG signal can be … Continue reading My LiFi demo for ECG transmission
Reed Solomon and Convolutional Code are chosen for IEEE 802.15.7-2011 and IEEE 802.15.7m implementation. In this post, we will review the generation of the codes and simulate their performance for comparison. Reed Solomon Systematic RS codes are used for FEC (typically outer FEC) with GF(16), generated by the polynomial x4+x+1. The generators for the RS(n, … Continue reading FEC: Generation of Reed-Solomon and Convolutional Code
In the context of a safety assistance communication-based solution, OWC is a strong candidate for delivering the V2V communication power to cars. It is realized that the LED lighting is quipped to car mandatorily, meanwhile, a camera is considered as one of the indispensable sensors for car vision. The existence of supportive infrastructure enables the … Continue reading What is Optical Region-of-Interest Signaling?
This post briefly reviews the current status of standardization groups within IEEE 802.15 There are IEEE standards covering the optical spectrum, IEEE 802.15.7-2011 std., known as VLCIEEE 802.15.7m std., (publication in 2018, as expected), including OCC modesIEEE 802.15.13 std., (ongoing), adding LiFi (IEEE 802.15.7-2011 std. is also the base document as IEEE 802.15.7m)IEEE 802.11, introducing LiFi to 802.11IEEE 802.15 … Continue reading A comparison between OCC standardization groups within IEEE 802.15
PHY operating modes The latest IEEE 802.15.7m draft standard (until Aug. 2018) is on the Sponsor Balloting recirculation. This version has updated a lot in compared to the previous version before LiFi modes are moved to new task group under IEEE 802.15. A list of operating modes between two drafts is a good start. Notation … Continue reading PHY modes within IEEE 802.15.7m draft – a quick review
OWC Standards under IEEE 802 There are IEEE standards covering the optical spectrum, IEEE 802.15.7-2011 std., known as VLC IEEE 802.15.7m std., (publication in 2018, as expected), including OCC modes IEEE 802.15.13 std., (ongoing), adding LiFi (IEEE 802.15.7-2011 std. is also the base document as IEEE 802.15.7m) IEEE 802.11, introducing LiFi to 802.11 IEEE 802.15 … Continue reading OCC Standardization Roadmap
Figure 1 - Examples of promising use cases using OCC Various application fields of OCC include Indoor lighting Digital Signage Traffic lighting, V2V, V2X Interactive Display with Screen Augmented Reality experience with Smartphones There are plenty of promising applications with OCC. I have drawn several illustrations to explain "where OCC can be used" and "how … Continue reading OCC Use Cases/ Promising Services
Figure 1- Example of OCC promising services (a) OCC vehicular use case. (b) OCC indoor use case OCC: Optical Camera Communication VLC: Visible Light Communication LiFi: Light Fidelity OWC: Optical Wireless Communication What is Optical Camera Communication? OCC aims to deliver data from the light source(s) to the camera. Artificial lights (LED light) are available everywhere human being … Continue reading What is Optical Camera Communication?