Title :
Optimum TDD downlink/uplink time ratio to minimize interference in coexisting FDD downlink
Author :
Seo, Younghoon ; Kim, Young-Soo
Author_Institution :
Dept. of Electr. Eng., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang, South Korea
Abstract :
Orthogonal frequency division multiple access (OFDMA) based frequency division duplexing (FDD) systems can coexist with time division duplexing (TDD) systems in the same geographical area operating in adjacent frequency bands. However, this may cause adjacent channel interference and the throughput loss in the FDD systems. Through the interference modeling, it was found that the optimum downlink to uplink transmission time ratio of the TDD system to minimize the throughput loss in adjacent FDD downlink is between about 4:6 and 5:5.
Keywords :
OFDM modulation; frequency division multiple access; interference suppression; minimisation; radio links; time division multiplexing; wireless channels; FDD downlink; OFDMA; TDD systems; adjacent channel interference; frequency division duplexing systems; interference minimization; interference modeling; optimum TDD downlink-uplink time ratio; optimum downlink-to-uplink transmission time ratio; orthogonal frequency division multiple access; throughput loss minimization; time division duplexing systems; Downlink; Frequency conversion; Interchannel interference; OFDM; Throughput; Coexistance; FDD; Interference; OFDMA; TDD;
Conference_Titel :
ICT Convergence (ICTC), 2012 International Conference on
Conference_Location :
Jeju Island
Print_ISBN :
978-1-4673-4829-4
Electronic_ISBN :
978-1-4673-4827-0
DOI :
10.1109/ICTC.2012.6387193
