Generalized Noncoherent Ultra-Wideband Receivers

TitleGeneralized Noncoherent Ultra-Wideband Receivers
Publication TypePhD Thesis
AuthorsPedross-Engel, A.
AdvisorWitrisal, K.
SchoolGraz University of Technology
Place PublishedGraz
Year of Publication2014

In this work, the modeling and optimization of realistic front-end components is addressed and their impact on the system performance of noncoherent multi-channel ultra-wideband receivers is analyzed. With a proposed generalized mathematical framework, it is shown that there exists a variety of noncoherent multi-channel receiver types with similar system performance which differ only in their front-end filters. It is also shown that analog multipliers introduce strong interference due to higher-order mixing products. To analyze the impact of such interference on the performance of the receiver system, a Wiener-Hammerstein system model is introduced for the multiplication device. It is shown that the receiver performance strongly depends on the input power of the nonideal multiplier devices. A proposed mixed-signal integration device is able to suppress nonlinear cross-products between data carriers. Passive filter structures are analyzed for this purpose. It is shown that the optimized filter outperforms the reference system using an ideal sliding window integrator because it is able to mitigate more system noise. Additionally, an enhanced signal detection is introduced which is able to mitigate undesired nonlinear effects and hereby reduces the bit-error rate. Finally, a hardware example of a noncoherent multi-channel receiver is presented which proves the feasibility to design and manufacture such receivers with today’s technologies.

Keywordsmultiplier, nonlinear, receiver, UWB
Citation KeyPedrossEngelPhD2014
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