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.
- distributed antennas
- signal-to-interference ratio
Tong, F., Atkinson, R. C., Glover, I. A., Pennock, S. R., & Shepherd, P. R. (2008). Effect of co-phasing diversity on CDMA downlink capacity. Electronics Letters, 44(13), 786-788. https://doi.org/10.1049/el:20080323