Download Bandwidth-Efficient Digital Modulation with Application to by Marvin K. Simon PDF

By Marvin K. Simon

A major examine bandwidth-efficient modulations with purposes to state-of-the-art area programBased on study and effects bought on the California Institute of Technology's Jet Propulsion Laboratory, this well timed ebook defines, describes, after which delineates the functionality (power and bandwidth) of electronic conversation platforms that contain a large choice of bandwidth-efficient modulations applicable for the layout and implementation of house communications systems.The writer compares the functionality of those structures within the presence of a few useful (non-ideal) transmitter and receiver features reminiscent of modulator and section imbalance, imperfect service synchronization, and transmitter nonlinearity. even though the cloth specializes in the deep area functions constructed on the Jet Propulsion Laboratory, the presentation is adequately extensive as to be acceptable to a number of different functions facing RF communications.An vital contribution to the medical literature, Bandwidth-Efficient electronic Modulation with program to Deep house Communications* was once commissioned by means of the JPL Deep house Communications and Navigation approach middle of Excellence* highlights many NASA-funded technical contributions concerning deep house communications structures* is part of the distinguished Deep area Communications and Navigation SeriesThe Deep area Communications and Navigation sequence is authored by way of scientists and engineers with vast adventure in astronautics, communications, and similar fields. It lays the basis for innovation within the parts of deep house navigation and communications by means of disseminating cutting-edge wisdom in key applied sciences.

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Additional info for Bandwidth-Efficient Digital Modulation with Application to Deep-Space Communications (Deep-Space Communications and Navigation Series 3)

Example text

86 dB. If perfect carrier synchronization had been assumed, then as shown in Ref. 58-dB average performance degradation. Aside from intrachannel and interchannel amplitude and phase imbalances, the inclusion of a fully saturated RF amplifier modeled by a bandpass hard limiter in the analytical model causes additional degradation in system performance. The performance of OQPSK on such a nonlinear channel was studied in Ref. 10, using the same modulator imbalance model as previously discussed above.

2-21, the output of the modulator can be represented by a trellis (Fig. 2-24), where again each branch is labeled with the input bit and the signal transmitted. Note that the trellis is time varying (the branch labels alternate with a period of two). In view of the trellis representation in Fig. 2-24, the optimum receiver is again an MLSE that has the identical structure as that in Fig. 8-43), the real part of the comparator (difference) output is omitted, and the decision device outputs balanced +1, −1 data rather than 0, 1 data.

8 12) where (π/2) i≤n−1 αi is the accumulated phase at the beginning of the nth transmission interval that is equal to an odd integer (positive or negative) multiple of π/2 when n is odd and an even integer (positive or negative) multiple of π/2 when n is even, and xn is a phase constant required to keep the phase continuous at the data transition points t = nTb and t = (n + 1) Tb . Note also that xn represents the y-intercept (when reduced modulo 2π) of the path in the phase trellis that represents φ (t, α).

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