Performance of Superposition Coding for Downlink Coordinated Two-Point System

Author

Zesong Fei ; Ang Yang ; Chengwen Xing ; Jinhong Yuan ; Jingming Kuang

Author_Institution

Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China

Volume

62

Issue

8

fYear

2013

fDate

Oct. 2013

Firstpage

4057

Lastpage

4064

Abstract

In this correspondence, we consider a downlink coordinated two-point (DCTP) system, where two users communicate with two base stations. A superposition-coding (SC)-based transmission scheme is proposed to improve its error performance. A joint interference-cancellation and maximum-ratio-combining (IC-MRC) detection algorithm is proposed for the SC scheme, which reduces the error probability of the system compared with the classic SC (CSC) detector. Closed-form expressions of the bit error probability (BEP) of the proposed scheme are derived. Under the same power and time constraint, a signal-to-noise ratio (SNR) gain is obtained when the SC scheme is employed. Tight upper bounds of the BEP are derived to provide insight. Optimal power allocation is also derived to optimize the system performance in terms of the BEP.

Keywords

cooperative communication; error statistics; interference suppression; maximum likelihood detection; network coding; CSC detector; DCTP system; bit error probability; classic SC detector; downlink coordinated two-point system; interference cancellation; maximum ratio combining detection algorithm; optimal power allocation; signal to noise ratio gain; superposition coding-based transmission scheme; Broadcasting; Detectors; Relays; Resource management; Signal to noise ratio; Upper bound; Wireless communication; Interference canceling; maximum ratio combining (MRC); power allocation; superposition coding (SC);

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2013.2256439

Filename

6492110