TABLE OF CONTENTS The previous chapters gave all the materials required for understanding current OFDM-based systems. Chapter 2 gave the prerequisite knowledge on radio channels, Chapter 3 the principle and history of OFDM, Chapter 4 the OFDM characteristics, including the theoretical analysis in frequency selective fading channels, Chapter 5 and 6 the synchronization issues, and Chapter 7 the forward error correction (FEC) to gain a frequency diversity effect.
This chapter describes several applications of OFDM scheme in various systems. Section 8.2 introduces the application in digital broadcasting, such as DAB, DVB-T, and ISDB-T. Section 8.3 describes the application in 5 GHz-band wireless LANs, such as IEEE 802.11a, HIPERLAN type 2, and MMAC. Section 8.4 introduces the applications in wireless LANs that are under development for standardization by the end of 2002, such as IEEE 802.11g, IEEE 802.11h, and IEEE 802.16a.
Advances in high fidelity (hi-fi) digital recording techniques triggered a digital revolution in the late 1980s in sound broadcasting technology. The hi-fi sound sources were not only suitable for indoor but also outdoor use, and they gave rise to the requirement for mobile reception of digital audio signals. This requirement, which was considered impossible in the early 1980s because of the multipath problem, was suddenly fulfilled by the use of OFDM.
Digital audio broadcasting (DAB) was specified between 1988 and 1992, with its introduction in Europe scheduled for the late 1990s. Many DAB field trials were carried out by broadcasters in Europe, including DAB...
