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Statistical Analysis of Time-Variant Channels in Diffusive Mobile Molecular Communications. (arXiv:1704.06298v1 [cs.IT])
来源于:arXiv
In this paper, we consider a diffusive mobile molecular communication (MC)
system consisting of a pair of mobile transmitter and receiver nano-machines
suspended in a fluid medium, where we model the mobility of the nano-machines
by Brownian motion. The transmitter and receiver nano-machines exchange
information via diffusive signaling molecules. Due to the random movements of
the transmitter and receiver nano-machines, the statistics of the channel
impulse response (CIR) change over time. We introduce a statistical framework
for characterization of the impulse response of time-variant MC channels. In
particular, we derive closed-form analytical expressions for the mean and the
autocorrelation function of the impulse response of the channel. Given the
autocorrelation function, we define the coherence time of the time-variant MC
channel as a metric that characterizes the variations of the impulse response.
Furthermore, we derive an analytical expression for evaluation of the expected
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