Title :
Adaptive Packet Assignment Schemes in Multi-User OFDM Systems
Author :
Lee, Yong Oh ; Kim, Jongkyung ; Sohn, Kyung Ho ; Seo, Jongsoo ; Kim, Young Yong
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Abstract :
This paper considers localized packet assignments and distributed packet assignments as joined in the transmission time interval (TTI) for downlink in multi-user OFDM systems. To enhance throughput, we propose an adaptive packet assignment using mode selection between the localized packet assignment and the distributed packet assignment. Moreover, we compare three types of localized packet assignment schemes and show the performance of GPA approaches to optimum performance by improving the spectral efficiency.
Keywords :
3G mobile communication; OFDM modulation; broadband networks; mobile radio; adaptive packet assignment schemes; broadband wireless systems; distributed packet assignments; localized packet assignment schemes; multi-user OFDM systems; transmission time interval; Adaptive systems; Bandwidth; Base stations; Downlink; Interference; Modulation coding; Noise level; OFDM; Signal to noise ratio; Throughput;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
Print_ISBN :
1-4244-0266-2
DOI :
10.1109/VETECS.2007.276
