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A Simple Transmit/Receive Antenna Diversity for Indoor DS/CDMA Wireless Communication Systems
Koichiro BAN Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
IEICE TRANSACTIONS on Communications
Publication Date: 1997/12/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
multi-antenna transmission, flat fading, CDMA, diversity,
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This paper proposes a direct-sequence spread spectrum (DS/SS) communication system with a new diversity technique designed for indoor multi-path fading channels where path diversity isn't available. In this system, the transmitter sends a same signal from multiple antennas at the same time with intentional time delays, which allows the receiver to distinguish and combine the signals from different antennas. We also consider the combination of this scheme with the conventional receiving antenna diversity for additional diversity gain. Furthermore, it is found that the use of the multiple transmitting antennas decreases the effect of the multiple access interference.