Secure Routing Protocol for Ad Hoc Networks
Most recent ad hoc network research has focused on providing routing services without considering security. In this paper, we detail security threats against ad hoc routing protocols, specifically examining AODV and DSR. In light of these threats, we identify three different environments with distinct security requirements. We propose a solution to one, the managed-open scenario […]
Channel Estimation Based on Divergence Minimization for OFDM Sytems with Co-Channel Interference
In this paper, we present a novel approach for pilotaided channel estimation in OFDM systems with synchronous co-channel interference. The estimator is derived based on the Kullback-Leibler divergence minimization framework. The obtained solution iteratively updates both the desired user’s and the interferer’s channels, using a combination of linear minimum mean squared-error (LMMSE) filtering and interference […]
Channel Estimation Techniques Based on Pilot Arrangement in OFDM Systems
The channel estimation techniques for OFDM systems based on pilot arrangement are investigated. The channel estimation based on comb type pilot arrangement is studied through different algorithms for both estimating channel at pilot frequencies and interpolating the channel. The estimation of channel at pilot frequencies is based on LS and LMS while the channel interpolation […]