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At the transmitter, the input symbols s(t) can be modulated onto the molecules with different approaches: Frequency modulation: controlling the density/speed of the emitted molecules [5] Timing modulation: controlling the emission time of the molecules [14] Amplitude modulation: controlling the number of the emitted molecules [15].
Conclusions are drawn in Section 8. Consider the IM/DD modulation for WOC systems, in which the desired waveform is modulated onto the instantaneous power of the carrier and a photo-detector produces a current proportional to the received instantaneous power.
The complex data are modulated onto the N subcarriers via the inverse discrete Fourier transform (IDFT).
Compounds eluting from the first dimension column were cryogenically trapped, concentrated, and re-injected (modulated) onto the second dimension column.
The composite baseband signal is modulated onto the optical carrier by varying the optical power proportional to the baseband signal amplitude in an optical IM/DD system.
with s k = d k e j θ k being the complex data symbols that are modulated onto the OFDM subcarriers and f k =fb+k Δ f.
Similar(49)
Analog multiplexing, as employed in the North American telephone systemIn frequency-division multiplexing (FDM), 12 separate voice signals, each of 4-kilohertz bandwidth, are modulated onto carrier waves in the 60 108-kilohertz range.
The OQAM symbols are then fed into the FBMC modulator, where they are filtered and modulated onto their respective subcarriers.
In an OFDM system, the source data in the frequency domain X = [X(0),X(1),…,X(N−1)] T is modulated onto N parallel subcarriers to obtain the time domain signal z = [z(0),z(1),…,z(N−1)] T = F H X. In general, the elements of X can be categorized into X ( m ) = X d ( m ) ∀ m ∈ I d X p ( m ) ∀ m ∈ I p, (1).
Let us now consider the transmission of the baseband signal that is modulated onto a carrier of frequency.
The body of the packet was an uncoded bit stream modulated onto a QPSK constellation.
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