Title :
Low complexity implementation of Alamouti space-time coded OFDM transmitters
Author :
Yang, Jooyeol ; Cheun, Kyungwhoon
Author_Institution :
Div. of Electr. & Comput. Eng., Pohang Univ. of Sci. & Technol., South Korea
fDate :
4/1/2004 12:00:00 AM
Abstract :
Space-time and space-frequency coded orthogonal frequency division multiplexing systems employing the Alamouti scheme were proposed by Lee and Williams. Straightforward implementation of these systems requires separate inverse discrete Fourier transform (IDFT) processing blocks for each of the two transmit antennas. In this letter, DFT/IDFT symmetry properties are utilized to approximately halve the computational load of these systems at the transmitter.
Keywords :
OFDM modulation; antenna arrays; discrete Fourier transforms; radiocommunication; space-time codes; transmitters; transmitting antennas; Alamouti space-time code; OFDM transmitter; computational load reduction; discrete Fourier transform; inverse DFT; low complexity implementation; multiple antenna; orthogonal frequency division multiplexing system; space-frequency code; symmetry property; transmit antenna; wireless communication; Block codes; Discrete Fourier transforms; Frequency division multiplexing; OFDM modulation; Space time codes; Telecommunication standards; Transmitters; Transmitting antennas; Wireless LAN; Wireless communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.827443
