The concept of 2-D barcodes is of great relevance for use in wireless data transmission between handheld el ectronic devices. In a typical setup, any file on a cell p hone, for example, can be transferred to a second cell phone through a series of images on the LCD which a re then captured and decoded through the camera of t he second cell phone. In this study, a new approach fo r data modulation in 2-D barcodes is introduced, and i ts performance is evaluated in comparison to other sta ndard

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... thods of barcode modulation. In this new app roach, orthogonal frequency-division multiplexing (O FDM) modulation is used together with differential ph ase shift keying (DPSK) over adjacent frequency doma in elements. A specific aim of this study is to establish a system that is proven tolerant to camera movements, picture blur, and light leakage within neighboring pixe ls of an LCD 1. Introduction Communication industry has grown enormously in past six decades and supports various applications belong to different research fields. Wireless communication is ma jor constituent of communication industry which has 75 % of total market share. Wireless communication takes the communication domain to next level in terms of reli ability and performance. Mobile data transmission is co nsidered as 21 st century system which offers higher data rate but suffers from complexity.