Power control through water filling game theory in adaptive modulation based MCCDMA-MIMO system

Wireless multimedia communications are playing important roles in the emerging communication system, which require effective transmission with resource access for providing diverse Quality of Services (QoS) to accommodate variety of services like multimedia and bursty traffic. MCCDMA-MIMO, Multi Carrier Code Division Multiple Access (MC-CDMA) technique with spatial diversity and spatial multiplexing scheme of multiple-input and multiple-output (MIMO) has drawn significant interest for the future generation networks due to its ability of multiple access and spectral efficiency. The adaptive modulation is a promising concept to provide a wide variety of communication services such as video, teleconferencing, internet access and real time multimedia services. However, the network of adaptive modulation based MCCDMA-MIMO system has limited throughput performance due to the simultaneous transmissions over sub carriers and non identical fading nature. The power control, sub carrier grouping and adaptive transmission technique is one of the open solutions for QoS enhancement in MCCDMA-MIMO system. In this paper, the water filling game theory is adopted to allocate proper power for every sub-channel and subcarrier group assignment strategy for mitigating interference noise and M-QAM based adaptive modulation is followed for transmission scheme to attain users QoS demands.