A wireless cellular system has three cells and two channels. There are five active terminals. SIR-balancing power control is employed. Both channels may be used if an SIR of at least γ0 = 18 dB can be...

A wireless cellular system has three cells and two channels. There are five active terminals. SIR-balancing power control is employed. Both channels may be used if an SIR of at least γ0 = 18 dB can be achieved. The link gain matrix is given by

a) Is there a channel allocation such that the SIR requirement is met in the downlink for all terminals? b) Determine the SIRs that can be achieved in the uplink for this channel allocation. What is the conclusion?