Impact of Digital Signal Processing Systems on Coverage of Free Over the Air Digital Television

Abstract

Abstract - Digital Signal Processing (DSP) Systems are playing an important Role in today’s communications systems. In June 12, 2009 all analog television Broadcasting stations were turned off in the United States, to remain on air with what we know today as: free over the air digital television (DTV), using a combination of technologies with data processing and signal processing that lead to a modulation scheme known as 8 levels of vestigial sideband (8VSB). This document will describe the steps in the implementation of 8VSB modulation and the impact on coverage of broadcast stations in Puerto Rico, using as a model real parameters of a local station WLII. The impact evaluation was based on establishing a difference between the transmitter coverage area before and after the DTV conversion and how DSP systems have supported this conversion. Key Terms - ASI Asynchronous Serial Interface, ATSC Advanced Television System Committee, MPEG Motion Picture Experts Group, SMPTE Society of Motion Picture and Television Engineers