Echo cancellation in pulsed terahertz integrated circuits

Neshat, Mohammad; Heidari, Abdorreza; Saeedkia, Daryoosh; Safavi-Naeini, S.

doi:10.1109/icimw.2008.4665644

Cited by 1 publication

(1 citation statement)

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“…Wideband differential phase shifter using microstrip non-uniform transmission line has also successfully minimized reflections [8]. Several other echo cancelation techniques have also been proposed where echo is canceled in high frequency circuits [9,10]. But the potential drawback of these proposals is that any system parameter changes after fabrication may produce static discontinuities which cannot be addressed.…”

Section: Introductionmentioning

confidence: 99%

Improvement in Data Transmission Efficiency in Communication Systems Using Scattering Compensation Techniques

Raju¹,

Salahuddin²,

Raza

2010

PIER C

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The primary requirement for maximum power transfer and minimum power loss is matched impedance in a transmission system. However, static design variations in system such as parasitics and dynamic variations such as changes in transmission frequency will result in reflections. A redesign or reconfiguration of complex systems is neither easy nor cost effective. A noble technique for compensating reflections in a communication system is presented here. The proposed methodology adapts the system to change without any modification to the system physical configuration. In this methodology compensation signals are added by I/O drivers with programmable phase delay and drive strength adjustments to cancel reflections. The concept application is demonstrated for a narrow bandwidth antenna system. An operating frequency off the antenna frequency results in a degraded received message eye. Using the proposed technique, without modifying the antenna, reflections were compensated and a significantly improved data eye was produced, as measured by the enhancement of critical performance parameters. The architecture of an expanded driver to implement the concept is outlined here. An algorithm and flow chart to dynamically identify and compensate for reflections are also presented.Corresponding author: M. I. Raza (iraza@ewubd.edu). 238Raju, Salahuddin, and Raza

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Section: Introductionmentioning

confidence: 99%