Ad hoc, multihop CDMA networks with route diversity in a Rayleigh fading channel

Abstract

In an ad hoc multihop CDMA network, fading can adversely affect the expected progress per hop of a packet. However, the effects of fading can be mitigated through route diversity, where a given source-destination pair has multiple possible paths through which to route packets. First, the distribution of the interference power is derived using a previously proposed model, and with Rayleigh fading the distribution is shown to be the same as for the non fading case except for a scaling factor. Expressions for the expected progress per hop are derived for the cases with and without next-hop route diversity. We find that the expected progress per hop in a Rayleigh fading channel can be significantly improved with low-order route diversity.