Resource allocation scheme with proportional fairness for multi-user downlink MIMO-OFDMA-CDM systems
- Resource Type
- Conference
- Authors
- Fuwa, Yasuhiro; Okamoto, Eiji; Iwanami, Yasunori
- Source
- 2009 9th International Symposium on Communications and Information Technology Communications and Information Technology, 2009. ISCIT 2009. 9th International Symposium on. :588-593 Sep, 2009
- Subject
- Communication, Networking and Broadcast Technologies
Computing and Processing
Resource management
Downlink
Frequency diversity
Fading
Eigenvalues and eigenfunctions
MIMO
Frequency conversion
Frequency domain analysis
Computer simulation
Wireless communication
- Language
In this paper, we propose a new resource allocation scheme that enhances a diversity effect with taking into account a proportional fairness (PF) in downlink MIMO-OFDMA-CDM (multiple input multiple output - orthogonal frequency division multiple access - code division multiplexing) systems. In the proposed scheme, spectral resources are allocated per subcarrier unit and full code-spreading is done for each user using all allocated subcarriers. This maximizes a frequency diversity effect and also enhances a multi-user diversity effect. Furthermore, the subcarrier allocation is based on the PF scheme which is not consider in conventional OFDMA-CDM schemes. The improvement performances of BER and capacity are shown through computer simulations.