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tdr (time domain reflectometry)
time domain reflectometry

time domain reflectometry: a seminal technique for measuring mass and energy in soil.
"time domain reflectometry: a seminal technique for measuring mass and energy in soil".

measurement of soil water content and electrical conductivity by time domain reflectometry: a review.
"measurement of soil water content and electrical conductivity by time domain reflectometry: a review".

time domain reflectometry: calibration techniques for accurate measurement of the dielectric properties of various materials.
"time domain reflectometry: calibration techniques for accurate measurement of the dielectric properties of various materials".

friedman, 2003 a review of advances in dielectric and electrical conductivity measurements in soils using time domain reflectometry.
friedman, 2003 "a review of advances in dielectric and electrical conductivity measurements in soils using time domain reflectometry".

and sargand, s.m., advanced processing of time domain reflectometry for improved slope stability monitoring, proceedings of the eleventh annual conference on tailings and mine waste, october, 2004.
and sargand, s.m., "advanced processing of time domain reflectometry for improved slope stability monitoring", "proceedings of the eleventh annual conference on tailings and mine waste", october, 2004.

la transmisiometría de dominio de tiempo (tdt - time-domain transmissometry ) es una técnica análoga que mide la (más que reflejada) impulso transmitido.
time-domain transmissometry (tdt) is an analogous technique that measures the transmitted (rather than reflected) impulse.

el estándar dtmb utiliza muchas tecnologías avanzadas para mejorar su rendimiento, como por ejemplo: un código pseudo-aleatorio de ruido (pn-pseudo-random noise) como intervalo de guarda que permite una sincronización más rápida del sistema y una estimación de canal más precisa; codificación ldpc (low-density parity-check) como protección contra errores; modulación tds-ofdm (time domain synchronization - orthogonal frequency division multiplexing) que permite la combinación de radiodifusión en sd, hd y servicios multimedia, etc.
===modulation===the dtmb standard uses many advanced technologies to improve their performance, for example, a pseudo-random noise code (pn) as a guard interval that allows faster synchronization system and a more accurate channel estimation, low-density parity check (ldpc) for error correction, modulation time domain synchronization - orthogonal frequency division multiplexing (tds-ofdm) which allows the combination of broadcasting in sd, hd and multimedia services, etc.