Open AccessSystem‐Level Performance of Spread Spectrum‐Based Add‐on Service Overlaid onto the Existing Terrestrial Digital Multimedia Broadcast Band
Author(s) -
Yoon Seokhyun,
Lim Bomi,
Lee Yong Tae
Publication year - 2012
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.12.0111.0700
Subject(s) - digital multimedia broadcasting , digital terrestrial television , computer science , digital broadcasting , path loss , broadcasting (networking) , fading , digital video broadcasting , service (business) , digital audio broadcasting , transmission (telecommunications) , reduction (mathematics) , terrestrial television , channel (broadcasting) , telecommunications , digital television , computer network , wireless , mathematics , economy , geometry , economics
We consider an overlaid broadcast service, where a spread spectrum (SS)‐based broadcast signal is overlaid onto the existing terrestrial Digital Multimedia Broadcasting (T‐DMB) band. The system is similar to the augmented data transmission in the ATSC DTV, for which it was investigated mostly in terms of link level performance, such as bit error rate. Our focus in this paper is on the system‐level performances. More specifically, utilizing both a large scale path loss and a small scale fading channel model, the primary objective is to explore the tradeoff between the coverage and the achievable rate of the overlaid service and, finally, to determine the achievable rate in the overlaid service for marginal coverage reduction in the existing broadcast service. The analytical and simulation results show that an SS‐based add‐on service of 10 kbps to 20 kbps can co‐exist with the T‐DMB service while resulting in only a marginal degradation in T‐DMB coverage (for example, less than one percent reduction).