Dual-Hop Transmission Scheme Based on Hierarchical Modulation in Wireless Networks

Jeong-Chul SHIN
Jin-Hyuk SONG
Jee-Hoon KIM
Hyoung-Kyu SONG

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.6    pp.1645-1648
Publication Date: 2010/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.1645
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cooperation,  STBC,  hierarchical modulation,  

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Dual-hop wireless transmission is a technique by which the channel from the source to the destination is divided into two shorter links using relays. By using this transmission, the communications reliability is improved whereas the throughput might go down since the dual-hop transmission is performed by two times. In this letter, we propose a scheme that uses hierarchical modulation at the source and adaptive modulation based on cyclic redundancy check (CRC) code at the relays. The proposed scheme is evaluated in terms of the bit error rate (BER) and throughput performances.