An Adaptive Time, Frequency and Code Allocation for MC-CDMA Systems

Author

Kim, Youngju ; Kwon, Taehoon ; Sohn, Kyung Ho ; Kim, Young Yong ; Hong, Daesik

Author_Institution

Center for Information Technology of Yonsei University (CITY), Information and Telecommunication Lab. Dept. of Electrical and Electronic Eng., Yonsei Univ., 134, Shinchondong, Seodaemungu, Seoul, Korea, 120-749. Fax: +82-2-312-4887, Tel: +82-2-2123-3558,

Volume

10

fYear

2006

fDate

38869

Firstpage

4369

Lastpage

4372

Abstract

In this paper, we propose an adaptive time, frequency and code allocation algorithm to guarantee heterogeneous quality of service (QoS) of users in multicarrier code division multiple access (MC-CDMA) systems. It is separated into two stages. First, time slots and frequency bands are allocated based on the proposed signal-to-noise ratio (SNR) threshold which reflects channel information and the QoS requirements of each user. Next, we propose a cost function which represents sum delay of users and then the codes are allocated by minimizing the cost function while guaranteeing the required bit error rate (BER) of users. Simulation results show that the proposed algorithm yields lower outage probability and higher throughput compared with the existing algorithms.

Keywords

Bit error rate; Cost function; Delay; Frequency domain analysis; Multicarrier code division multiple access; Performance gain; Quality of service; Radio spectrum management; Resource management; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2006. ICC '06. IEEE International Conference on

Conference_Location

Istanbul

ISSN

8164-9547

Print_ISBN

1-4244-0355-3

Electronic_ISBN

8164-9547

Type

conf

DOI

10.1109/ICC.2006.255325

Filename

4024723