Now showing items 1-14 of 14

    • Adaptive estimation of the stable boundary layer height using combined lidar and microwave radiometer observations 

      Saeed, Umar; Rocadenbosch Burillo, Francisco; Crewell, Susanne (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Article
      Open Access
      A synergetic approach for the estimation of stable boundary-layer height (SBLH) using lidar and microwave radiometer (MWR) data is presented. Vertical variance of the backscatter signal from a ceilometer is ...
    • Adaptive estimation of the stable boundary-layer height using backscatter lidar data and a Kalman filter 

      Saeed, Umar; Rocadenbosch Burillo, Francisco; Crewell, Susanne (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference lecture
      Restricted access - publisher's policy
      The nocturnal stable boundary-layer height (SBLH) is estimated from the backscatter lidar data by using an adaptive-filtering approach based on an Extended Kalman Filter (EKF). Height-resolved temporal variance of the ...
    • Atmospheric boundary layer height estimation using combined microwave radiometer and lidar data 

      Saeed, Umar; Tiana Alsina, Jordi; Crewell, Susanne; Rocadenbosch Burillo, Francisco (2014)
      Conference lecture
      Restricted access - publisher's policy
      The estimation of atmospheric boundary layer height (ABLH) during a full diurnal cycle using ground-based remote sensing instruments is one of the key challenges in atmospheric science. Most of these instruments such as ...
    • Atmospheric boundary layer height monitoring using a kalman filter and backscatter lidar returns 

      Lange, Diego; Tiana Alsina, Jordi; Saeed, Umar; Tomás Martinez, Sergio; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-01)
      Article
      Restricted access - publisher's policy
      A solution based on a Kalman filter to trace the evolution of the atmospheric boundary layer (ABL) sensed by a ground-based elastic-backscatter tropospheric lidar is presented. An erf-like profile is used to model the ...
    • Atmospheric-boundary-layer height retrieval using microwave radiometer and lidar sensors : algorithms and error estimation 

      Saeed, Umar (Universitat Politècnica de Catalunya, 2016-07-22)
      Doctoral thesis
      Open Access
      The Atmospheric Boundary Layer Height (ABLH) is an important parameter in weather forecasting, meteorology, avionics, and air-quality and dispersion models. Local development of the Atmospheric Boundary Layer (ABL) over ...
    • Energy and cost footprint reduction for 5G and beyond with flexible radio access network 

      Guerra Gómez, Rolando; Ruiz Boqué, Sílvia; García Lozano, Mario; Saeed, Umar (Institute of Electrical and Electronics Engineers (IEEE), 2021-10-15)
      Article
      Open Access
      This paper focuses on Beyond fifth generation (B5G) non-linear data modeling and decision-making tools to optimize cost reduction versus coverage-QoS trade-off, in other words, the number of active Remote Radio Heads or ...
    • 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)
      Conference lecture
      Restricted access - author's decision
      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 ...
    • Motivating a synergistic mixing-layer height retrieval method using backscatter lidar returns and microwave-radiometer temperature observations 

      Silva, Marcos Paulo Araujo da; Rocadenbosch Burillo, Francisco; Tanamachi, Robin; Saeed, Umar (Institute of Electrical and Electronics Engineers (IEEE), 2022-03-10)
      Article
      Open Access
      Mixing-Layer-Height (MLH) retrieval methods using backscattered lidar signals from a ceilometer (Jenoptik CHM-15k Nimbus) and temperature profiles from a Microwave Radiometer (MWR, HATPRO RPG) are compared in terms of their ...
    • On the feasibility of remote driving application over dense 5G roadside networks 

      Saeed, Umar; Hämäläinen, Jyri; García Lozano, Mario; González González, David (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      Remote driving (RD) is a critical backup option for an autonomous vehicle when it faces an unexpected situation on the road. Fifth generation (5G) mobile communication is a key enabler of RD providing link between the ...
    • On the use of existing 4G small cell deployments for 5G V2N communication 

      Saeed, Umar; Hämäläinen, Jyri; Mutafungwa, Edward; Wichman, Risto; González González, David; García Lozano, Mario (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      We study the feasibility of the dense 4G and 5G cellular networks at sub-6 GHz and millimeter wave carriers for vehicle-to-network applications. For this purpose, road-side network coverage, signal-to-interference-plus-noise ...
    • Performance test of the synergetic use of simulated lidar and microwave radiometer observations for mixing-layer height detection 

      Saeed, Umar; Rocadenbosch Burillo, Francisco; Crewell, Susanne (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2015)
      Conference report
      Restricted access - author's decision
      There are several instruments and methods to retrieve the atmospheric Mixing Layer Height (MLH). However, none of these instruments or methods can measure the development of the MLH under all atmospheric conditions. For ...
    • Route-based radio coverage analysis of cellular network deployments for V2N communication 

      Saeed, Umar; Hämäläinen, Jyri; Mutafungwa, Edward; Wichman, Risto; González González, David; García Lozano, Mario (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      Cellular vehicle-to-network (V2N) communication will be the backbone of the connected vehicles of future. One of the key requirements of the connected vehicles is a near universal coverage on the streets. Traditional radio ...
    • Synergetic use of lidar and microwave radiometer observations for boundary-layer height detection 

      Saeed, Umar; Rocadenbosch Burillo, Francisco; Crewell, Susanne (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      A synergetic approach for estimation of the nocturnal stable boundarylayer (SBL) height is presented. Aerosol backscatter from a lidar ceilometer and potential temperature from a microwave radiometer (MWR) are combined ...
    • Variance processing for stable boundary-layer height estimation using backscatter lidar data: A discussion 

      Muñoz Porcar, Constantino; Silva, Marcos Paulo Araujo da; Saeed, Umar; Rey Micolau, Francesc; Pay Pérez, M. Teresa; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      In this paper we present a method for estimating the height of the nocturnal stable boundary layer by using lidar measurements and a single radiosonde for unambiguous initial guess. The method relies on the correlation ...