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Five reasons to promote OCC

The light spectrum is a rescue solution for the exponential growth of wireless connectivity demand. The bandwidth of light is 1000 times larger than the entire RF bandwidth. Among light communication technologies, Optical Camera Communication (OCC) is an entirely software-based solution, which is the best compatible with existing infrastructures such as commercial cameras and lighting. … Continue reading Five reasons to promote OCC

Compare 2D ACO-OFDM vs 2D DCO-OFDM

This post discovers the difference between 2D ACO-OFDM and 2D DCO-OFDM from implementation perspective. The Simulation Package allows us to test all the performance without any hardware configuration needed. Besides the simulation package (package 1), optical link package (package 2) and optimal optical link package (package 3) are within the 2D-OFDM Code packages. 2D Mapping … Continue reading Compare 2D ACO-OFDM vs 2D DCO-OFDM

NEW 2D-OFDM Codes available

We now release new 2D-OFDM Codes (2D ACO-OFDM) and update existing Code adding many interesting features. Notably, TWO MORE new software packages are now included. NEW Package 1 (ACO/DCO-OFDM Simulation) New features This allows for choosing different modulation modes, including Modulation option: 2D ACO-OFDM or 2D DCO-OFDMChangeable clipping factor for reducing PAPREnable Inner-FEC and spatial-pilots … Continue reading NEW 2D-OFDM Codes available

C-OOK Code Update available

We now release new updates of the C-OOK Codes by adding several interesting features as follows. (Two additional software Packages, but the same single price.) Package 1 (Back to Back Link) New features This allows for choosing different modulation modes for Tx, configuring (simulated) cameras and channel. All are live demonstration, which are similar real … Continue reading C-OOK Code Update available

A-QL Code Update available

We now release an update of the A-QL Code by adding several interesting features: Switching between 16*16 and 32*32 cells modesAuto-threshold feature for RXEnable button for option of RGB colors calibrationFeedback nodes for a clean block diagram Please download the following PPT file for a review of the software User Interface (TX and RX). A-QL … Continue reading A-QL Code Update available

Update OpenSource List

The OpticalPress Team is happy to provide Open Source Codes based on IEEE 802.15.7-2018 Optical Wireless Communication (OWC) standard, the most recent international standard that includes Optical Camera Communication (OCC) technologies. We believe that the codes are beneficial for the implementation of your novel ideas as well as practical comparison purposes. We were lucky and … Continue reading Update OpenSource List

Implementation of HA-QL Code

HA-QL (Hidden Asynchronous Quick-Link) is a hidden modulation mode among Screen-2-Camera operating modes within the IEEE 802.15.7-2018 Optical Wireless Communication standard. An interesting feature of HA-QL is that it allows for controlling the peak-to-peak amplitude of the intensity modulation, from a visible code to a hidden code. The HA-QL Code Project is cleaned, well-packed and documented. Technical … Continue reading Implementation of HA-QL Code

Performance of Screen OCC: 2D-OFDM vs. A-QL

In the previous posts, the implementation demo and the implementation guidance of the Screen-OFDM system were shown. The measured performance comparison between Screen-OFDM and a traditional A-QL in IEEE 802.15.7m is reported in this post. Overview of 2D-OFDM vs A-QL A-QL is the single-carrier modulation while 2D-OFDM is the multi-carrier modulation approach applied for the … Continue reading Performance of Screen OCC: 2D-OFDM vs. A-QL

Generation of Screen-OFDM

In the previous post, an implementation demo of the Screen-OFDM system was shown. The detailed generation of Screen-OFDM (2-dimensional OFDM) is described in this post. Index Terms: Optical Camera Communication, OCC, OFDM, optical OFDM, 1D-OFDM, 2D-OFDM,  OFDM-OCC, Screen OFDM. Benefit of OFDM 1) General Benefits The concept of OFDM has reached sufficient maturity for standardization and employment … Continue reading Generation of Screen-OFDM

Neural Network for Optical Wireless Communication

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

2D-OFDM for Optical Camera Communication

OFDM is well-known for LiFi; however, it is still fresh advanced waveform for OCC. This post shares an implementation of 2D-OFDM for Screen-to-Camera communication system in which a massive number of display cells brings a great advantage for communication. A full journal version of this topic is available online at IEEE Access here. System Architecture … Continue reading 2D-OFDM for Optical Camera Communication

Software-defined Configuration method for OCC Systems

The purpose of the post is to specify the PIB attributes for configuring a particular OCC PHY mode. Any OCC PHY mode is co-existing with the others and recognizable by a specific receiver once the PIBs are specified. The configuration of PHY-PIB attributes is software-defined (App-based). Without using PHY-frame overhead, the App-based configuration is communication … Continue reading Software-defined Configuration method for OCC Systems

HS-PSK: High-rate transfer over RoI(s)

HS-PSK is an operating mode being standardized at IEEE 802.15.7m. This post describes what it is for and how it operates. Figure 1 illustrates an example in which an Rx can select the link properly for an intended usage. The link setup procedure is solved by the RoI-Signaling waveform, while this high-rate waveform is additionally … Continue reading HS-PSK: High-rate transfer over RoI(s)

HA-QL: Part 2 – Hiding data into Screen using Wavelet Transform

HA-QL (Hidden Asynchronous Quick-Link) is a hidden modulation mode among Screen-2-Camera operating modes those are being standardized at IEEE 802.15.7m. The previous post explains the principle to generate a hidden code on the screen using an additional intensity modulator after the bit-intensity mapper. However, the modulation of screen intensity dramatically degrades the communication performance. In … Continue reading HA-QL: Part 2 – Hiding data into Screen using Wavelet Transform

Rolling shutter OCC: Communication distance vs Data rate Trade-off

The classification of OCC technologies has been given. Being a part of non-flicker modulation series, with the vast usage of rolling shutter cameras in the camera market, the use of rolling shutter cameras in OCC systems takes advantage of the high sampling rate of the rolling shutter mechanism, which sequentially exposes pixel lines to the … Continue reading Rolling shutter OCC: Communication distance vs Data rate Trade-off

C-OOK: Customizing OOK for Optical Camera Communication

C-OOK stands for Camera ON-OFF Keying, is also an operating mode being standardized in IEEE 802.15.7m. This post reviews the operation of this mode and highlights its characteristics. See video demo 1 (Manchester coded for Rolling shutter OCC): https://www.youtube.com/watch?v=tMaR7B5M3QI See video demo 2 (4B6B coded for Rolling shutter OCC): https://www.youtube.com/watch?v=wPbeZZxEMVY C-OOK for OCC and its … Continue reading C-OOK: Customizing OOK for Optical Camera Communication

CM-FSK: Customizing FSK for Optical Camera Communication

CM-FSK stands for Camera M-ary Frequency Shift Keying, is also an operating mode being standardized in IEEE 802.15.7m. This post reviews the operation of this mode and highlights its characteristics. See video demo 1 to have a brief understanding of CM-FSK System: (7m transmission) https://www.youtube.com/watch?v=cUt5zbRSyoQ Also, video demo 2 (35m transmission distance): https://www.youtube.com/watch?v=BVqh570bCRY&t=5s   FSK … Continue reading CM-FSK: Customizing FSK for Optical Camera Communication

FEC: Generation of Reed-Solomon and Convolutional Code

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

What is Optical Region-of-Interest Signaling?

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?

A comparison between OCC standardization groups within IEEE 802.15

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 modes within IEEE 802.15.7m draft – a quick review

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

OCC Standardization Roadmap

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

OCC Use Cases/ Promising Services

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

Classification of OCC Technologies

Table 1- Classification of OCC, its expected performance, and intended usages Given that various modulation schemes for OCC systems have been investigated till the date, the proper modulation scheme should depend on both Tx and Rx. Table 1 suggests to classify OCC schemes into four categories under the following considerations: (i) The method by which … Continue reading Classification of OCC Technologies

What is Optical Camera Communication?

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?