Exploració per tema "Microwave communication systems"

Ara es mostren els items 1-9 de 9

    • A sensitivity study of land surface temperature to soil moisture using in-situ and spaceborne observations 

      Pablos Hernández, Miriam; Piles Guillem, Maria; Sanchez, Nilda; Gonzalez Gambau, Verónica; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Martinez Fernandez, Jose (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Surface Soil Moisture (SSM) affects the soil surface energy balance and thus affects the Land Surface Temperature (LST), and viceversa. Currently, LST and SSM are remotely sensed using TIR sensors and L-band radiometers, ...

    • Compact tunable and reconfigurable microwave photonic filter for satellite payloads 

      Yoosefi, Oraman (Universitat Politècnica de Catalunya, 2015-07-08)
      Projecte Final de Màster Oficial
      Accés obert
      We present a novel approach for the photonic filtering of microwave signals based on a direct- synthesis technique with optical phase modulation of the microwave signal and employing two tunable laser sources and a fixed ...

    • Exploiting the structure of MWR-derived temperature profile for stable boundary-layer height estimation 

      Saeed, Umar; Rocadenbosch Burillo, Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2015)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      A method for the estimation of Stable Boundary Layer Height (SBLH) using curvature of the potential temperature profiles retrieved by a Microwave Radiometer (MWR) is presented. The vertical resolution of the MWR-derived ...

    • Impact of the local oscillator calibration rate on the SMOS measurements and retrieved salinities 

      Gabarró Prats, Carolina; Gonzalez Gambau, Verónica; Corbella Sanahuja, Ignasi; Torres Torres, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2013-09-02)
      Article
      Accés restringit per política de l'editorial
      The local oscillators (LOs) of the Soil Moisture and Ocean Salinity mission payload are used to shift the operating frequency of the 72 receivers to an optimal intermediate frequency needed for the signal processing. ...

    • Photonic microwave filtering techniques 

      Gyerák, Tamás (Universitat Politècnica de Catalunya, 2016-07-14)
      Projecte Final de Màster Oficial
      Accés obert
      A simple technique for microwave photonic filtering is presented, which allows independent tunability of each ends of the RF passband by tuning of the wavelengths of the lasers which are phase modulated with the RF signal ...

    • Real-time RFI detection and mitigation system for microwave radiometers 

      Forte Veliz, Giuseppe Francesco; Querol Borràs, Jorge; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena (Institute of Electrical and Electronics Engineers (IEEE), 2013-10)
      Article
      Accés restringit per política de l'editorial
      Microwave radiometers are very sensitive passive sensors that measure the power of the thermal noise within a determined bandwidth. Therefore, any other signal present in the band modifies the value of the measured power, ...

    • Sensitivity of L-band vegetation optical depth to carbon stocks in tropical forests: a comparison to higher frequencies and optical indices 

      Chaparro Danon, David; Duveiller, Grégory; Piles de la Fuente, María Pilar; Cescatti, Alessandro; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Entekhabi, Dara (2019-10-01)
      Article
      Accés obert
      Monitoring vegetation carbon in tropical regions is essential to the global carbon assessment and to evaluate the actions oriented to the reduction of forest degradation. Mainly, satellite optical vegetation indices and ...

    • Towards microwave system for real-time medical imaging 

      Guardiola Garcia, Marta; Buitrago Ventura, Santiago; Romeu Robert, Jordi; Jofre Roca, Lluís (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Microwave tomography is proposed for medical diagnosis using Magnitude Combined tomographic algorithm. A proof-of-concept experimental system was build and an in-homogeneous breast phantom with a tumor embedded was ...

    • Xarxa de microones sintonitzadora multimodal reconfigurable 

      Ribera Graells, Adrià (Universitat Politècnica de Catalunya, 2013-12-04)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Nowadays, the matching networks are essential components in front-end architectures for microwave communication systems operating up several gigahertzes. Due to the increase of communication standards in multiband ...