Constellation-constrained capacities for parametric underwater communication

Wiedmann, Karsten; Weber, Tobias

doi:10.1109/oceans-bergen.2013.6608009

Cited by 5 publications

(2 citation statements)

References 13 publications

(21 reference statements)

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“…With the presented noise model, standard QAM, phase-shift keying (PSK) or amplitude-shift keying (ASK) can be applied. With additive noise modelled after the square-law detector, a predistortion of constellation points in the IQ plane gives optimal results, as discussed by Wiedmann and Weber (2013).…”

Section: Receiver Descriptionmentioning

confidence: 99%

“…This topic is also active under research for single carrier acoustic underwater communication systems (Wiedmann and Weber, 2013) and OFDM optical communication systems (Tan et al, 2013), where similar problems as for the self-mixing receivers arise. For analog single carrier amplitde modulation (AM) signals, it is known that a carrier has to be sent within the transmit signal having at least half of the transmit power for incoherent demodulation to yield the original desired signal (Kammeyer, 2011 very same concept has been transfered to OFDM signals and is then called self-heterodyne (Shoji et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Orthogonal frequency division multiplexing with amplitude shift keying subcarrier modulation as a reliable and efficient transmission scheme for self-mixing receivers

2017

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Abstract. A new receiving scheme for self-mixing receivers is presented that overcomes the disadvantages of the selfheterodyne concept. Generally speaking, the self-mixing receiver offers immunity to phase noise and frequency offsets, especially at very high frequencies, since it does not require radio frequency local oscillators. Our proposed technique eliminates the drawbacks of the self-heterodyne transmission scheme, which are the poor power efficiency and the strong dependence on the continously transmitted carrier.A nonlinear system of equations is constructed that describes a phase retrieval problem for the reconstruction of the original transmit signal before self-mixing. Two different solution strategies, with restrictions in time and frequency domain, are presented. As a consequence, the self-mixing equation system is shown to be solvable with some a-priori information about the transmit signal. With this novel approach, the transmitted information is distributed over the full available bandwidth, and there is no special dependence on a certain subcarrier for the down-conversion.The general performance, regarding bit error ratio over signal to noise ratio, is improved by at least 2 dB as compared to the self-heterodyne transmission scheme. In the case of frequency selective channels, e.g. multi-path propagation, this improvement is shown to be much larger, because the presented approach is able to reconstruct the received subcarriers without the necessity of receiving all subcarriers.

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Section: Receiver Descriptionmentioning

confidence: 99%