標題: An analysis on downlink capacity of multi-cell OFDMA systems under randomized inter-cell/sector interference
作者: Fu, I-Kang
Sheen, Wern-Ho
電信工程研究所
Institute of Communications Engineering
關鍵字: OFDMA;capacity;interference randomization
公開日期: 2007
摘要: An analysis on downlink capacity of multi-cell OFDMA (orthogonal frequency division multiple access) systems is presented in this paper under a model of randomized multiple access interference, which is a result of applying random sub-carrier allocation among different cells/sectors. The analysis shows that the system capacity is either in the bandwidth-limited or power-limited region and that optimum tradeoff between capacity and coverage is achievable in a sense that given a required capacity the maximum coverage can be determined. The capacity is evaluated for different system setups, which are characterized by cell radius, reuse factor and types of antenna system with and without spatial division multiple access (SDMA). Three types of antenna are considered including omni-directional antenna, 3-sector antenna and switched-beam smart antenna. Numerical results show that the use of 3-sector and switched-beam smart antenna can enlarge the bandwidth-limited region and achieves a better capacity and coverage tradeoff.
URI: http://hdl.handle.net/11536/6746
http://dx.doi.org/10.1109/VETECS.2007.562
ISBN: 978-1-4244-0265-6
ISSN: 1550-2252
DOI: 10.1109/VETECS.2007.562
期刊: 2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6
起始頁: 2736
結束頁: 2740
顯示於類別:會議論文


文件中的檔案:

  1. 000252237601234.pdf