IEEE 802.16 Physical Layer
This chapter discusses about the different variants of the IEEE 802.16 PHY layer with their capabilities and conditions of operation. The OFDM based physical layer has been overviewed with its various mechanisms. Finally the chapter concludes with a discussion on OFDM technology and its design considerations.
3.1 IEEE 802.16 PHY Layer:
The IEEE 802.16 standard supports multiple physical specifications due to its modular nature. The first version of the standard only supported single carrier modulation. Since that time, OFDM and scalable OFDMA have been included to operate in NLOS environment and to provide mobility. The standard has also been extended for use in below 11 GHz frequency bands along with initially supported 1066 GHz bands.
3.1.1 Supported Band of Frequency
The IEEE 802.16 supported licensed and unlicensed bands of interest are as follows: