Intelligence and communications satellites are also susceptible to interference and data theft.
This is also the time when the UE receives strong interference, and data rate will be very low.
All this scandalabra has kept Facebook execs very busy with year, with policy staffers and execs being grilled by lawmakers on an increasing number of fronts and issues — from election interference and data misuse, to ad transparency, hate speech and abuse, and also directly, and at times closely, on consumer privacy and control. .
Appendices A and B provide important developments about statistical properties of the subband noise and data interference terms.
The former condition leads to important simplifications in the derivation of the ML estimator, especially in the statistical properties of the subband noise and data interference.
Another important contribution of this paper is the analysis of the distributions of the subband noise and data interference terms in the general OFDM/OQAM framework, where the pilot tones can be scattered or appended as preamble to the data.
As a result of the AWGN assumption and the ensuing assumptions on the noise and data interference terms η k,n and (zeta ^{;d}_{k,n}), V will be a real Gaussian random vector with zero mean and a nearly diagonal covariance matrix (boldsymbol {C}_{boldsymbol {V}}=mathrm {E}[boldsymbol {V}boldsymbol {V}^{T}]approx sigma ^{2}_{v}boldsymbol {I}).
At the transmitter, the modulation control unit uses subcarrier modulation strategy to generate interference cancelation and data subcarriers to reduce the interference; then, by means of an N-point inverse discrete Fourier transform (IDFT) converter, the frequency-domain subband signal X i (k) is converted into a time-domain signal x i (n), with output length N.
Eventually, the demodulation control unit adopts a similar strategy as that of the modulation block to complete the signal estimations for both the interference cancelation and data subcarriers.
Using Multiple Input Multiple Output MIMOO) architecture in cognitive radio (CR) secondary users improves the system performance in terms of interference cancellation and data rate enhancement but at the expense of adding complexity and cost.
From the experiments, we identified several problems that have never been well studied before, such as heterogeneous packet delivery, temporal and spatial transmission range uncertainty, multi-hop interference and delayed data transmissions.
