Rate, Sub-Carrier, and Power Allocations for Multi-Carrier CDMA with LMMSE Multiuser Detection

Author

Fu, Po-Wei ; Chen, Kwang-Cheng

Author_Institution

Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei

Volume

6

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

1574

Lastpage

1580

Abstract

Multi-carrier code-division-multiple-access (MC-CDMA) is a promising transmission technique for high-speed wireless multimedia communication in frequency-selective fading channels. In this letter, allocations of physical transmission rate, sub-carrier, and power are proposed for a MC-CDMA system that applies multi-code (MC)/variable-spreading-length (VSL) multi-rate access to minimize total transmitted power, where we consider users have different data rate and BER.requirements and LMMSE multiuser detection is used in the receivers. We derive transmission rate capacity and propose a simple admission control criterion that linearly relates the code length, data rate and BER requests of all users. The proposed iterative allocation algorithm jointly allocates the sub-carrier power of each user and solves the sub-carrier allocation problem

Keywords

code division multiple access; error statistics; fading channels; iterative methods; least mean squares methods; multiuser detection; telecommunication congestion control; variable length codes; BER; LMMSE; MC-CDMA; admission control criterion; frequency-selective fading channels; high-speed wireless multimedia communication; iterative allocation algorithm; multi-carrier CDMA; multi-carrier code-division-multiple-access; multicode multirate access; multiuser detection; power allocations; receivers; sub-carrier allocation problem; sub-carrier power; transmission rate capacity; variable-spreading-length; Bit error rate; Frequency-selective fading channels; Iterative algorithms; Multiaccess communication; Multicarrier code division multiple access; Multimedia communication; Multiuser detection; Resource management; Streaming media; Wireless communication;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.360352

Filename

4202156