OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
EHAC'06 Proceedings of the 5th WSEAS International Conference on Electronics, Hardware, Wireless and Optical Communications
A software-defined communications baseband design
IEEE Communications Magazine
Broadband wireless access with WiMax/802.16: current performance benchmarks and future potential
IEEE Communications Magazine
Design and implementation of a system bus - SPI bridge for wireless radio prototyping
WSEAS Transactions on Circuits and Systems
Proceedings of the Conference on Design, Automation and Test in Europe
| Hi-index | 0.00 |
This paper provides an overview of the radio interface physical layer requirements of WIMAX. Worldwide Interoperability for Microwave Access was defined by the WIMAX Forum formed in 2001. WIMAX is defined in the IEEE 802.16 standard. Wireless MAN Standards-based technology enable the delivery of "last mile" wireless broadband access as an alternative to Cable and DSL. This paper then presents the implementation of the current WIMAX standards on a second generation flexible baseband processor. The implementation will be limited to the receiver chain blocks and will be entirely in ANSI C, written for a fixed point digital signal processor. The underlying assumption of this implementation is to avoid any hardware accelerators that would make the platform for the baseband processing become standard specific. The SB3500 is the second generation of SandBlaster-based low power, high performance System on a Chip (SoC) products developed to serve the Software Defined Radio (SDR) modem applications space. It is a multi-core device, containing 3 'SBX' DSP cores. The software implementation of WIMAX physical layer includes implantation of OFDM and receiver chain processing in ANSI C. The projected processing requirements of a WIMAX terminal on the SB3500 are presented with the expected number of cores needed for the data rates analyzed. The down-sampling filter used for the initial Synchronization and for the fine synchronization, FFT block, and Channel estimation for each reference symbol are included in this analysis. The specific architectural features of the SB3500 and the compiler optimizations to yield a real time software implementation of WIMAX are also presented.