Impact of Bit Errors in Digitized RF Data on Ultrasound Image Quality

This article quantitatively analyzes the impact of bit errors in digitized RF data on ultrasound image quality. The quality of B-mode images in both linear array and phased array imaging is evaluated by means of three objective image quality metrics: peak signal-to-noise ratio, structural similarity index, and contrast-to-noise ratio, when...

BER analysis for MPAM signal constellations in the presence of fading and ADC quantization noise

In this letter, closed-form expressions for the bit error rate of M-ary pulse amplitude modulated signal constellations as a function of the analog-to-digital converter word length, the signal-to-noise ratio and the fading distribution, are derived. These results allow for a rapid and accurate evaluation of the system performance when the analog...

Bit-error rate measurement setup and comparator design

Bit-error rate (BER) of comparators is becoming one of the limiting factors in the design of high speed ADCs. BER measurement setup is introduced and implemented in this thesis. Using this BER measurement setup gives us the opportunity to compare the BER of different comparators. It also enables us to study the effect of different parameters...