Space-Code Transmit Diversity for OFDM-CDM Systems

• FUJII Masaaki

  Samsung Yokohama Research Institute Co., Ltd.

Abstract

This paper presents a transmit diversity scheme that uses space-time block codes (STBC) in space-spreading code dimensions for time-direction spreading or two-dimensional spreading orthogonal frequency-division multiplexing code-division multiplexing (OFDM-CDM) downlink transmission The STBC output symbols in two adjacent time slots are spread by two distinctive spreading codes and multiplexed in the same spreading segment At a receiver, the received subcarriei signals are despread with the two spreading codes in the direction of time, space-time decoded, and then combined in the direction of frequency Simulation results demonstrated that the proposed scheme provided high tolerance to Doppler spread and outperformed space-time transmit diversity (STTD) for high-mobility users

Journal

• IEICE Trans. Commun., B

  IEICE Trans. Commun., B 86 (12), 3468-3475, 2003-12-01

  The Institute of Electronics, Information and Communication Engineers

Keywords

• OFDM-CDM
• transmit diversity
• space-time block code
• Doppler spread

Details

• CRID: 1573950402084616704
• NII Article ID: 110003221585
• NII Book ID: AA10826261
• ISSN: 09168516
• Text Lang: en
• Data Source:
  • CiNii Articles