SPATIAL SPREADING WITH SPACE-TIME AND SPACE-FREQUENCY TRANSMIT DIVERSITY SCHEMES FOR A WIRELESS COMMUNICATION SYSTEM

摘要

Techniques for transmitting data using a combination of transmit diversity schemes are described. These transmit diversity schemes include spatial spreading, continuous beamforming, cyclic delay diversity, space-time transmit diversity (STTD), space-frequency transmit diversity (SFTD), and orthogonal transmit diversity (OTD). A transmitting entity processes one or more (ND) data symbol streams based on a transmit diversity scheme (e.g., STTD, SFTD, or OTD) to generate multiple (NC) coded symbol streams. Each data symbol stream may be sent as a single coded symbol stream or as multiple (e.g., two) coded symbol streams using STTD, SFTD, or OTD. The transmitting entity may perform spatial spreading on the NC coded symbol streams with different matrices to generate multiple (N T ) transmit symbol streams for transmission from N T antennas. Additionally or alternatively, the transmitting entity may perform continuous beamforming on the N T transmit symbol streams in either the time domain or the frequency domain.