The Simple Near-Optimal Pairing Scheme of Superposition Coding in Downlink DS-CDMA Multi-path Channel

Author

Eom, Seungyeon ; Yang, Janghoon ; Kim, Dong Ku

Author_Institution

Yonsei Univ., Seoul

fYear

2007

fDate

4-7 Nov. 2007

Firstpage

1065

Lastpage

1069

Abstract

The paring scheme of superposition coding (SC) is developed to increase the user capacity in downlink DS-CDMA on multi-path channel. Unlike the previous work on frequency flat fading channel, the inter-user interference in the same SC and interference from other orthogonal codes are considered in selecting a pair of users for SC and evaluating their power allocation. We first examine the maximum supportable signal to interference and noise power ratio (SINR) and introduce the simple pairing scheme which offers nearly the same capacity with the same transmit power as the optimum pairing but requires far less computational complexity.

Keywords

channel coding; code division multiple access; communication complexity; interference; multipath channels; orthogonal codes; radio links; wireless channels; computational complexity; downlink DS-CDMA multipath channel; frequency flat fading channel; near-optimal pairing scheme; noise power ratio; orthogonal code; power allocation; signal-to-interference; superposition coding; Bandwidth; Downlink; Equations; Fading; Frequency; Interference; Multiaccess communication; Multipath channels; Power system modeling; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

978-1-4244-2109-1

Electronic_ISBN

1058-6393

Type

conf

DOI

10.1109/ACSSC.2007.4487385

Filename

4487385