Title :
A peak power efficient cooperative diversity using star-QAM
Author :
Ishibashi, Koji ; Shin, Won-Yong ; Yi, Hyo Seok ; Ochiai, Hideki
Author_Institution :
Sch. of Eng. & Appl. Sci., Harvard Univ., Cambridge, MA, USA
Abstract :
In this paper, we propose a new simple relaying strategy with bit-interleaved convolutionally coded star quadrature amplitude modulation (QAM). Star-QAM is composed of multiple concentric circles of phase-shift keying (PSK). Exploiting this property, a hard limiter is used to enhance power amplifier (PA) efficiency at a relay. We analyze our proposed cooperation in terms of asymptotic pairwise error probability (PEP) and show that it can achieve the full diversity order conditioned on that the minimum free distance dfree of the convolutional codes is large enough. Finally, theoretical results and effectiveness of PA efficiency are confirmed by computer simulations.
Keywords :
convolutional codes; cooperative communication; diversity reception; error statistics; interleaved codes; phase shift keying; quadrature amplitude modulation; asymptotic pairwise error probability; bit-interleaved convolutional code; cooperative diversity; hard limiter; multiple concentric circles; phase shift keying; power amplifier; quadrature amplitude modulation; simple relaying strategy; star QAM; Bit error rate; Convolutional codes; Decoding; Fading; Phase shift keying; Quadrature amplitude modulation; Relays; amplify-and-forward (AF); amplitude-and-phase shift keying (APSK); cooperative diversity; power Amplifier (PA) Efficiency; star quadrature amplitude modulation (star-QAM);
Conference_Titel :
GLOBECOM Workshops (GC Wkshps), 2011 IEEE
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4673-0039-1
Electronic_ISBN :
978-1-4673-0038-4
DOI :
10.1109/GLOCOMW.2011.6162414
