Title :
Resource allocation scheme with proportional fairness for multi-user downlink MIMO-OFDMA-CDM systems
Author :
Fuwa, Yasuhiro ; Okamoto, Eiji ; Iwanami, Yasunori
Author_Institution :
Dept. of Comput. Sci. & Eng., Nagoya Inst. of Technol., Nagoya, Japan
Abstract :
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.
Keywords :
MIMO communication; OFDM modulation; code division multiple access; error statistics; resource allocation; BER; MIMO-OFDMA-CDM systems; bit error rate; code division multiplexing; multi-user downlink; multiple input multiple output; orthogonal frequency division multiple access; proportional fairness; resource allocation scheme; Computer simulation; Downlink; Eigenvalues and eigenfunctions; Fading; Frequency conversion; Frequency diversity; Frequency domain analysis; MIMO; Resource management; Wireless communication;
Conference_Titel :
Communications and Information Technology, 2009. ISCIT 2009. 9th International Symposium on
Conference_Location :
Icheon
Print_ISBN :
978-1-4244-4521-9
Electronic_ISBN :
978-1-4244-4522-6
DOI :
10.1109/ISCIT.2009.5341177