Implementation of a Real-Time Adaptive Modulation OFDM Transceiver System

The performance analysis of new transmission schemes in wireless communication is usually based on simulations and many new methods do not run on real systems because of the limited real-time performance. In this paper the implementation of an adaptively modulated orthogonal frequency division multiplexing (OFDM) transceiver for real-time applications is presented. Especially the calculation time for the bit allocation table (BAT) must fulfill critical time requirements. It is shown that all processing steps can be carried out by personal computers with an Intel Core i7 CPU 920 for a radio signal bandwidth of 12.5 MHz.