The channel has a root mean square delay spread of 18 ns.
In[15], the path loss and the root mean square delay spread of the signal in industrial environment were investigated.
The spatial distributions of the received optical power and root mean square delay spread are analyzed through calculation and comparison.
The root mean square delay spread T D of the power delay profile can be determined by T D = 4/f s ≈ 2.1 μ s [10].
Simulations were also performed in multipath channels with exponential power delay profile and root mean square delay spread equal to 2 sampling intervals.
In this paper, we propose two types of LED deployment strategies — centralized and distributed and compare their performances on the basis of average outage area ratio, effect of semi-angle, root mean square delay and data transmission rate.
Based on a measurement campaign carried out in seven Brazilian residences, a statistical characterization of frequency response magnitude, average channel gain, coherence bandwidth, root mean squared delay spread, coherence time, achievable data rate, additive noise and access impedance are presented, considering the frequency bands from 1.7 up to 30, 50 and 100 MHz.
The Rayleigh fading channels were simulated using 20-path NLOS channel models, denoted as A1, B1, and C2, with root-mean square delay spreads equal to 24.15, 94.73, and 310 nanoseconds, respectively.
After denoting with fd the maximum Doppler frequency, and with τ ̄ rms the root-mean square delay spread of the channel, we define, respectively, the coherence bandwidth ([35], Ch. 4) and coherence time ([36], Ch. 4) of the channel as W C = 1 τ ̄ rms, (28a) T C = 0.423 f d. (28b).
The channel is assumed to be time variant with a Doppler frequency equal to 10 Hz for WiFi signals and a root-mean-square delay spread of 25% of D. The SNR is processed as described in Section 2.1.
The channel is assumed to be time variant with a Doppler frequency equal to 100 Hz for WiMAX signals and a root-mean-square delay spread of 25% of D. The SNR is processed as described in Section 3.1.
