Handoff issues in a transmit diversity system
This thesis addresses hando? issues in a WCDMA system with space-time block coded transmit antenna diversity. Soft hando? has traditionally been used in CDMA systems because of its ability to provide an improved link performance due to the inherent macro diversity. Next generation systems will incorporate transmit diversity schemes employing several transmit antennas at the base station. These schemes have been shown to improve downlink transmission performance especially capacity and quality. This research investigates the possibility that the diversity obtained through soft hando? can be compensated for by the diversity obtained in a transmit diversity system with hard hando?. We analyze the system for two performance measures, namely, the probability of bit error and the outage probability, in order to determine whether the improvement in link performance, as a result of transmit diversity in a system with hard hando?s obviates the need for soft hando?s.
Advisor:Miller, Scott; Reddy, A. L. Narasimha; Friesen, D.; Narayanan, K. R.
School:Texas A&M University
School Location:USA - Texas
Source Type:Master's Thesis
Keywords:handoff handover wcdma code division multiple access spread spectrum transmit diversity sttd
Date of Publication:12/01/2003