Title :
Channel capacity of SC-FDMA cooperative AF relay using spectrum division & adaptive subcarrier allocation
Author :
Nakada, Masayuki ; Takeda, Kazuki ; Adachi, Fumiyuki
Author_Institution :
Dept. of Electr. & Commun. Eng., Tohoku Univ., Sendai, Japan
Abstract :
In this paper, we propose a spectrum division & adaptive subcarrier allocation for cooperative amplify-and-forward (AF) relay using single carrier-frequency division multiple access (SC-FDMA). To obtain increased frequency diversity gain, the transmit SC signal spectrum is divided into sub-blocks, to each of which a different set of subcarriers (resource block) is adaptively allocated based on the each user´s channel condition. The adaptive subcarrier allocation has a tradeoff between the channel capacity and the peak-to-average power ratio (PAPR). We evaluate the outage channel capacity of SC-FDMA using cooperative AF relay and discuss such a tradeoff relationship. Simulation results show that the SC-FDMA using the proposed spectrum division & the adaptive subcarrier allocation can achieve the similar capacity to the orthogonal frequency division multiple access (OFDMA) while keeping lower PAPR property.
Keywords :
channel capacity; frequency division multiple access; spread spectrum communication; SC-FDMA cooperative AF relay; adaptive subcarrier allocation; cooperative amplify-and-forward relay; frequency diversity gain; orthogonal frequency division multiple access; outage channel capacity; peak-to-average power ratio; single carrier-frequency division multiple access; spectrum division; Channel capacity; Frequency diversity; Frequency domain analysis; Peak to average power ratio; Relays; Resource management; Shadow mapping; Cooperative relay; SC-FDMA; adaptive subcarrier allocation;
Conference_Titel :
Network Infrastructure and Digital Content, 2010 2nd IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-6851-5
DOI :
10.1109/ICNIDC.2010.5657834