Downlink power allocation in distributed wireless communication systems
Jing Wang · Journal of Tsinghua University(Science and Technology) · 2009
A downlink power allocation scheme was developed to improve the spectral efficiency of distributed wireless communication systems (DWCS). The method assumes that only the large-scale channel state information (CSI) is known at the transmitter, so the method can be easily applied in practice. Then, an optimal power allocation scheme was developed when both the large-scale CSI and the small-scale CSI are known at the transmitter. Simulations show that the capacity of this scheme is quite close to the optimal method and that the large-scale CSI has a greater effect than the small-scale CSI on the power allocation performance in DWCS, which implies that DWCS are very practicable.