Title :
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
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);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2013.2256439
