Low complexity resource efficient OFDM transceiver design

Abstract

The rcsource requirements of every new gcneration of wireless systems solution have been far cxceeding the existing system solution offerings and capabilities [I]. The classical system solutions based on micro-controller (pC), Digital Signal Processor (DSP) and hardwired logic combination are rigid, unscalable, inefficient and don't provide a cost effective migration path [ 2 ] [ 3 ] . The earlier generations of wireless systems solution were incapable of providing the scalability, contigurability and expandability to adapt to the new rcquircments resulting in reinventing of the ncw design solution, and in process, learning from one gencration to the next was completely abandoned. A refinement in the design methodology of the wireless systems development is needed, which takes a methodical approach towards thc reusability, scalability, configurability and flexibility for the wireless systems solution.

Fixed Broadband Wireless Access (FBWA) with Practical OFDM System

“… Selection of SC Spacing: Number of SCs, Modulation, and Coding Rate Based on the guard period and OFDM symbol period, the spacing of SCs is computed so that they are orthogonal to each other. The SC spacing is computed as the inverse of the useful OFDM symbol period (1/(OFDM symbol period -guard period) = 1/(240 − 40) μs = 5 kHz) [12].…”