Symbol-by-symbol rate adapting wireless communication systems: architecture

Author

Tsaur, Lih-Feng ; Lee, Daniel C.

Author_Institution

Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA

fYear

2003

fDate

22-24 April 2003

Firstpage

109

Lastpage

131

Abstract

In this paper, we present a symbol-based (SB), dynamic spreading gain control (DSGC) loop for multi-user CDMA wireless systems. Our SB-DSGC loop provides two advantages over other design. First, the transmitter has the flexibility to adjust spreading gain virtually at any time to maintain the fidelity of symbol error rate (SER) or bit error rate (BER) in time-varying channels. Secondary, our DSGC can have very frequent feedback the channel´s state information; e.g., at (CSI) every few symbols. Moreover, it allows the station to dynamically adjust spreading gain along with other adaptive transmission resource schemes with seamless effort. One usage of our DSGC is to maintain individual link´s BER in the wireless CDMA system operating in time-varying fading channels.

Keywords

code division multiple access; fading channels; mobile radio; time-varying channels; FOSSIL; Forest for OVSF-Sequence-Set-Inducing Lineages; adaptive transmission resource schemes; bit error rate; channel state information feedback; multi-user CDMA wireless systems; seamless effort; symbol error rate; symbol-based dynamic spreading gain control; time-varying channels; time-varying fading channels; transmitter; wireless CDMA system; wireless cellular systems; wireless mobile communication systems; Bit error rate; Channel state information; Error analysis; Gain control; Multiaccess communication; State feedback; Time varying systems; Time-varying channels; Transmitters; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Rail Conference, 2003. Proceedings of the 2003 IEEE/ASME Joint

Print_ISBN

0-7803-7741-9

Type

conf

DOI

10.1109/RRCON.2003.1204658

Filename

1204658