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The effect of imperfect CSI on the performance of random ad-hoc networks

The performance of Wireless Ad hoc Networks (WANETs) depends on the availability of Channel State Information (CSI) on all channels in the network. In this work we study the performance when each receiver has CSI only on the channel from its desired transmitter. We present a novel lower bound on the Ergodic Rate Density of a WANET with partial CSI. The novel bound is compared to a previously known bound and its superiority is demonstrated. We also use the novel bound to study the effect of CSI availability on the WANETs' performance. We show that for Rayleigh fading the CSI-gain of the bound can be up to 78%. But, if each network is optimized with respect to the active transmitter density, then the CSI gain of the bound is at most 13%. Simulation results show the practicality of the novel bound and the accuracy of the CSI-gain expressions.