Title :
DMT Analysis and Optimization for OFDM-Based Relaying Systems with Linear Detector
Author :
Yang, Weiwei ; Cai, Yueming
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
In this paper, we consider a single-antenna OFDM-based relaying system over frequency selective fading channels employing subcarrier grouping and linear constellation precoding at the source node, and linear detection at the destination node. We derive the closed-form expressions of the diversitymultiplexing tradeoff (DMT) relation, and develop the optimal symbol loading strategy (the optimal number of symbols assigned to each group), and the optimal grouping strategy (the optimal partition of the subcarriers) to achieve the optimum DMT performance. Simulation results are presented to verify our theoretical analysis.
Keywords :
OFDM modulation; cooperative communication; diversity reception; fading channels; optimisation; subcarrier multiplexing; OFDM-based relaying system; closed-form expression; diversity-multiplexing tradeoff relation; frequency selective fading channel; linear constellation preceding; linear detector; optimal grouping strategy; optimal symbol loading strategy; optimum DMT performance; single-antenna OFDM-based relaying system; subcarrier grouping; Detectors; Fading; Loading; OFDM; Peer to peer computing; Relays;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6134555
