Global ETD Search
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Showing 1 to 8 of 8 for “"linear equalization"”.
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Equalization Using Graphical Models
We examine the use of graphical models for the equalization of digital communication channels with memory. Graphical models provide a framework in which the structure of large systems can be exploited to derive efficient estimation algorithms. Furthermore, properties of a graph on which an …
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A Model-Based Receiver for CPM Signals in a Cochannel Interference Limited Environment
… The use of the Viterbi algorithm as a non-linear equalization technique to mitigate intersymbol interference is considered. We verified that the model-based sequence estimation schemes outperform the conventional non-coherent receivers for MSK with AWGN, flat fading, and CCI. Demodulator …
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Advanced receivers for space-time block-coded single-carrier transmissions over frequency-selective fading channels
… channels. First, we develop an MMSE-based turbo equalization scheme for Alamouti ST block-coded systems. A semi-analytical method to estimate the bit error rate (BER) is devised. Our results show that the proposed turbo equalization scheme offers significant performance improvements over one-pass …
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Electronic Mitigation of Polarization Mode Dispersion
… amelioration requires channel by channel, non-linear, adaptive mitigation. Electronic mitigation appears as a very attractive solution to overcome the limit set by the PMD. Consequently, we considered the implementation of these solutions at the receiver in the electrical domain. We verified …
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Digital equalization techniques for the compensation of nonlinear impairments in long-haul coherent optical communication systems
… Polarization Mode Dispersion (PMD), fiber nonlinearities) due to its more compact spectrum and constant envelope compared to on-off keying. Nonetheless, fiber-optic communication systems using DPSK were severely degraded by nonlinear phase noise. One way to quantify this system degradation is …
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Design of a High Speed Mixed Signal CMOS Mutliplying Circuit
… to run at a speed of 8.2 GHz with end-point nonlinearity less than 5%. The high speed and low nonlinearity make this circuit ideal for applications such as filtering and digital to analog conversion.</p>