Cooperative Intra-cell Spectrum Reuse Method for OFDMA-based Multiple Access Systems

Orthogonal frequency division multiple access (OFDMA) is a technique gaining momentum due to recent standardization work of IEEE 802.16. In this article the problem of radio resource management for OFDMA systems is addressed with particular focus on methods for intra-cell spectrum reuse by the application of embedded modulation. Recently proposed techniques for radio resource distribution (subcarrier allocation, bit loading, and transmit power control) among multiple users according to their individual QoS requirements are discussed and performance results are compared.