| Publisher | University of Mannheim | ||
|---|---|---|---|
| Format | 215.0KB PDF | Date added | 04 Nov 2003 |
| Topics | TDMA - CDMA, Mobile - Wireless Communications, Broadband | ||
| Downloads | 66 | ||
Adaptive array antennas are very effective in mitigating the effects of Co-Channel Interference (CCI) and multipath propagation in wireless communication systems. Here, antenna arrays applied to uplink reception in a broadband F/TDMA cellular system are investigated. The system employs QPSK with 15.36 Mbit/s. For low complexity space-time equalization a mixed solution is proposed based on a MMSE-type Space-Time Filter (STF) followed by a MLSE. The STF suppresses CCI and reduces Inter-Symbol Interference (ISI) while capturing spatial diversity. The MLSE removes the residual Inter-Symbol Interference (ISI). The channel estimation and the beamforming are performed jointly, so that constraints on tap weights have to be introduced to avoid the trivial solution problem.
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