Title :
Cooperative Transmission Utilizing High Order Superposition Modulation with Iterative Detection
Author :
Huan, Shuang ; Fei, Zesong ; Huang, Li ; Kuang, Jingming
Author_Institution :
Dept. of E.E., Beijing Inst. of Technol., Beijing, China
Abstract :
In this paper, we propose an improved decode-and-forward (DF) relaying mode utilizing high order superposition modulation (HOSM) and iterative detection techniques, in which each user takes turns to transmit signal that is the superposition of its own and its partner´s information. As the designed HOSM scheme is not gray mapping, we introduce iterative detection to further improve system performance. Simulation results show that the new strategy with superposition 16-QAM modulation (16-QAM SM) outperforms the classical DF system by about 1.5 dB and system with superposition 64-QAM modulation (64-QAM SM) is about 1 dB better than the classical DF scheme. Furthermore, the proposed systems with iterative detection can achieve extra 0.2-0.5 dB gains in the signal-to-noise ratio (SNR) range of interest.
Keywords :
decoding; iterative methods; quadrature amplitude modulation; radio networks; signal detection; QAM modulation; cooperative transmission; decode-and-forward relaying mode; gain 0.2 dB to 0.5 dB; gray mapping; high order superposition modulation; iterative detection techniques; transmit signal detection; wireless networks; Cooperative systems; Decoding; Diversity methods; Gain; Mobile antennas; Power system modeling; Relays; Samarium; System performance; Transmitting antennas;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5302768
