The impact of distributed antennas using co-phasing transmission diversity on downlink CDMA channels is examined. An expression is derived that demonstrates that uniform downlink signal-to-interference ratio across users can be achieved by appropriately weighting the distribution of transmit powers across distributed antennas. The capacity of a downlink CDMA system employing distributed antennas with optimum power allocation is then found by simulation.
- downlink CDMA channels
- uniform downlink signal-to-interference ratio
- CDMA downlink capacity
- co-phasing transmission diversity
- optimum power allocation
- distributed antennas