Advanced modulation coding schemes for an optical transceiver systems–based OWC communication channel model

This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.

PLC based colour mixing process using colour code and digital scale

There has been a requirement for the best quality, accuracy and quantity in the world in regards to colours. The work done covers up the processing the inputs for the colour mixing with variety of equipments. With the assistance of mixing tanks, all colours emerging through the chain of actions are mixed in the specified proportion. Obtained output colours are used for industrial applications. Among the three colours, six colours will be made with variety of proportions so it can be used in diversity. Some of factories are still opting the manual way and hence earlier systems are sensitive to defects because of interference of human being in the information acquisition and processing which also includes the mathematical calculations. Hence, it is required that a segment which recollects rough information, use it and puts up it in parameters which should also be validated and compared with the standard values. Here, HTML colour code and digital scale is used to obtain accurate degree of colour. In colour code scheme we use colour HEX and colour picker. These results are compared with the traditional method of colour mixing, where the amount of particular colour in terms of ml is taken and mixed with the other colour. The final colour obtained with both the methods is compared and analysed and found almost similar shades of colour.