A SIMPLE TRANSMIT RECEIVE ANTENNA DIVERSITY FOR INDOOR DS/CDMA WIRELESS COMMUNICATION-SYSTEMS/

This paper proposes a direct-sequence spread spectrum (DS/SS) communic ation system with a new diversity technique designed for indoor multi- path Fading channels where path diversity isn't available. In this sys tem, 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 c onsider the combination of this scheme with the conventional receiving antenna diversity for additional diversity gain. Furthermore, it is f ound that the use of the multiple transmitting antennas decreases the effect of the multiple access interference.