A frame synchronization scheme for uplink MC-CDMA

Author

Kim, Sang Hyo ; Ha, Kilsik ; Lee, Choong Woong

Author_Institution

Image Comm. Lab., Seoul Nat. Univ., South Korea

Volume

4

fYear

1999

fDate

1999

Firstpage

2188

Abstract

Most present synchronization techniques for downlink MC-CDMA (multi-carrier code division multiple access) are not suitable for uplink MC-CDMA because users´ signals reach the base station asynchronously. In this paper, a frame synchronization scheme for uplink MC-CDMA with asynchronous transmission is suggested. This technique uses a time domain signal which is produced when the spreading code of MC-CDMA is given in the frequency domain. The correlation of already known information, that is, IDFT of the spreading code and sampled received signal, becomes the metric of frame synchronization. In order to obtain good correlation characteristics in the time domain, a new spreading code scheme is suggested. The proposed scheme uses no other information than already known spreading code and does not need FFT operation. Also, the scheme performs well in multipath fading channels

Keywords

code division multiple access; correlation theory; fading channels; frequency-domain analysis; mobile radio; multipath channels; signal sampling; spread spectrum communication; synchronisation; time-domain analysis; IDFT; asynchronous transmission; base station; correlation; frame synchronization scheme; frequency domain; multi-carrier code division multiple access; multipath fading channels; sampled received signal; spreading code; time domain signal; uplink MC-CDMA; Base stations; Binary phase shift keying; Demodulation; Frequency estimation; Frequency synchronization; Multiaccess communication; Multicarrier code division multiple access; OFDM modulation; Timing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797326

Filename

797326