Error probability analysis for CDMA systems with closed-loop power control

Author

De Fina, Silvia ; Lombardo, Pierfrancesco

Author_Institution

Dipartimento di Ingegneria Elettronica, Rome Univ., Italy

Volume

49

Issue

10

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

1801

Lastpage

1811

Abstract

Fast closed-loop-power-control (CLPC) plays a key role in direct-sequence (DS) code division multiple access (CDMA) systems, aiming at achieving acceptable carrier-to-interference (C/I) ratios in all active links. Assuming a terrestrial mobile access, where the round-trip delay may be smaller than the channel time-coherence, fast CLPC can compensate for fading and reduce the error burstiness, as well. This paper provides analytical expressions for the bit error probability given: the CLPC algorithm specified in terms of loop delay and updating rate, the propagation power delay-profile and the terminal speed. A binary PSK DS spread spectrum radio interface, with RAKE processing of multipath or diversity, is considered. Our link-level analysis, being conditioned to a specified average value of C/I, is focused on the inverse update algorithm, which is aimed at keeping the received power at a constant level. Applications of the derived method, aimed at getting insight about CLPC performance in 3rd generation radio interfaces, is also provided and discussed

Keywords

cellular radio; closed loop systems; code division multiple access; diversity reception; error statistics; multipath channels; phase shift keying; power control; radio receivers; spread spectrum communication; telecommunication control; 3G radio interfaces; 3rd generation radio interfaces; BPSK DS spread spectrum radio interface; C/I ratio; CDMA systems; DS-CDMA; RAKE processing; bit error probability; carrier-to-interference ratio; cellular radio; channel time-coherence; direct-sequence code division multiple access; diversity reception; error burstiness; error probability analysis; fast closed-loop power control; inverse update algorithm; link-level analysis; loop delay; multipath channel; propagation power delay-profile; round-trip delay; terminal speed; terrestrial mobile access; updating rate; Algorithm design and analysis; Bit error rate; Delay; Error analysis; Error probability; Fading; Multiaccess communication; Multiple access interference; Power control; Spread spectrum communication;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.957402

Filename

957402