BVH patients showed higher values of EC of the COP signal measured in arbitrary units compared with the control group (conditions 1 and 2). None of the BVH patients could perform the test in condition 3. BVH patients had increased EC in the frequency band between 0.1 and 0.78 Hz when the visual information was canceled (condition 2).

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The UP group showed higher values for the TRS and MEE parameters compared with the CG (p < 0.05) when performing the HTR test to the side of the lesion and to the contralateral side, while the SSE only showed significant higher values when the patient estimated the GV towards the side of the lesion. The two patients in the CP group did not have differences in the three parameters assessed when compared with the CG.

This paper describes the architecture and operating principles of two digital pulse-width modulator (DPWM) implementations for low-cost field-programmable gate arrays (FPGAs). Both architectures are based on a countercomparator block to process the most significant bits (MSB) portion of the reference input, enriched with additional elements to enhance duty-cycle resolution according to the less significant bits (LSB). The first architecture described has already been reported, it uses the on-chip PLL blocks to generate fixed delays and a selector to choose the one corresponding with the desired duty-cycle. Post-fitting adjustment of PLL delays are required to compensate delay differences between the diverse signal paths across the selector. In the second architecture described, a serializer-deserializer (SERDES) module is used to serialize a thermometer-coded representation of the LSB portion of the input. This serialization technique is commonly used for data transmission on high-speed serial I/O data transmission standards like LVDS and is extensively supported by FPGA providers. Experimental results are presented for both architectures synthesized on standard low-cost FPGA chips, showing very good linearity and resolutions up to 1ns. The first architecture provides a moderately better resolution. The second architecture, on the other hand, is a much more robust solution as it requires no post-fitting delay adjustments.

Rise time showed increased values in peripheral vestibular lesion patients with chronic dizziness. Two-dimensional analysis (rise time vs steady-state error) allows a better discrimination between patients with peripheral vestibular hypofunction with chronic dizziness and the rest of the studied population.