Abstract:

The resource allocation model for downlink multiuser power communication orthogonal frequency division multiple access spatial division multiple access (OFDMASDMA) system is studied with the restrictions of requirement bit number for each user and power upper limit as well as specifically bit number for every subchannel in every orthogonal frequency division multiple (OFDM) symbol. An algorithm for power adaptation resource dynamic allocation with bitloading seeking table and exchanging adjustment is proposed based on user spatial orthogonality and priority. Simulation shows the proposed algorithms in power special wireless communication environment, and indicates that the proposal improves spectral efficiency significantly while maintaining quality of service guarantees and certain fairness.

Key words: power communication, orthogonal frequency division multiple access spatial divis