Cooperative Transmission Technique Using Space Time Delay Code in OFDMA Uplink System

Jae-Seon YOON
So-Young YEO
Jee-Hoon KIM
Hyoung-Kyu SONG

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.5    pp.1270-1273
Publication Date: 2007/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.5.1270
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
OFDMA,  DVB-RCT,  MIMO,  cooperative,  

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Multiple antennas are used to an essential part in order to support high link quality in wireless communication systems. The diversity techniques with multiple antennas provide better reliability than existing systems. But these techniques generally require more than one antenna at the transmitter or receiver. So, the system with multiple antennas has several limitations including size, cost, hardware complexity, and antenna space. In this letter, we propose a cooperative transmission technique that uses space time delay code in OFDMA uplink system; DVB-RCT. The proposed technique overcomes these limitations and gives the diversity gain of cooperative transmission in a concept of virtual MIMO with single transmit antenna.