DPSK-OFDM System for Reliable Data Transmission using QRcode System in Mobile Devices

Abstract

The work of 2-D barcodes is of great relevance for evaluate in wireless data transmission between handheld electronic devices. In a typical setup, any file on a mobile phone, for concrete illustration, can be transferred to a second mobile phone over a sequence of images on the LCD which are before captured and decoded on the camera of the second mobile phone. In this study, a new approach for data modulation in 2-D barcodes is confirmed, and its attitude is evaluated in allegory to contrasting standard methods of barcode modulation. In this new approach, orthogonal frequency-division multiplexing (OFDM) modulation is used together by all of differential phase shift keying (DPSK) over adjacent frequency domain elements. A specific desire of this study is to establish a system that is proven tolerant to camera movements, picture blur, and light leakage within adjoining pixels of an LCD. Keywords: Barcode, data transfer, differential phase shift keying, orthogonal frequency-division multiplexing (OFDM) modulation, quadrature phase shift keying I. INTRODUCTIONBarcodes have played a abundant role in facilitating numerous identification processes since their invention in 1952. In fact barcode is a easily done and cost-effective approach of storing machine readable digital data on paper or product packages. As pressing needs to hand over even greater data faster and mutually high reliability have emerged, there have been large amount improvements that were made on the original barcode design. Invention of two dimensional (2D) or matrix barcodes opened a new front for these cost-effective codes and their investigation in more complex data transfer scenarios like storing contact information, URLs plus, in which QR codes have become increasingly popular.