C. de la Morena-Alvarez-Palencia

Universidad Politécnica de Madrid, Madrid, Madrid, Spain

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Publications (7)2.23 Total impact

  • Cristina de la Morena-Alvarez-Palencia, Kaïs Mabrouk, Bernard Huyart, Amadou Mbaye, Mateo Burgos-Garcia
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    ABSTRACT: Six-/five-port architecture has advantages compared with conventional receiver architectures, especially for high frequencies and high-data-rate applications. However, it requires two/one additional baseband outputs and a calibration process to recover the original signal. While this problem is resolved in conventional six-port configurations, a solution is needed for five-port architectures. We propose an I/Q regeneration method based on the use of a simple analog circuit, eliminating one baseband output. The structure of this circuit derives from a mathematical formulation, which is presented in this paper. The validity of the method has been experimentally proved in a five-port receiver prototype. In addition, its capacity to reduce the dc-offset and second-order intermodulation distortion has been demonstrated.
    IEEE Transactions on Microwave Theory and Techniques 08/2012; 60(8):2634-2643. · 2.23 Impact Factor
  • Cristina de la Morena-Alvarez-Palencia, Mateo Burgos-Garcia, Javier Gismero-Menoyo
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    ABSTRACT: The six-port network has been identified in recent years as one of the best candidates to implement a Software Defined Radio (SDR). The main characteristic of the six-port architecture is its extremely large bandwidth, which involves multi-band and multi-mode capabilities. However, broadband six-port network designs lead to large size circuits. New technologies must be explored in order to achieve compact size and low-cost productions for configurable radio terminals. In this paper, the LTCC (Low Temperature Co-fired Ceramic) technology is proposed for implementing a six-port receiver. In the first place, we have developed an LTCC 90-degree hybrid coupler, which is the most critical component of the six-port network. Measurement results show a good performance over the frequency range from 1.5 to 6.5 GHz.
  • C. de la Morena-Álvarez-Palencia, D. Rodríguez-Aparicio, M. Burgos-García
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    ABSTRACT: In this paper several RF architectures have been investigated in order to find a flexible, reconfigurable and multi-mode RF front-end for Software Defined Radio (SDR). The objective is to develop a new professional mobile broadband communication system, oriented to Public and Governmental Services. Different receiver prototypes based on the studied architectures have been implemented. The comparison of the RF architectures from the measurement results will be presented. The receiver prototypes have been validated for different types of modulation and data rates.
    Security Technology (ICCST), 2010 IEEE International Carnahan Conference on; 11/2010
  • C. de la Morena-Alvarez-Palencia, M. Burgos-Garcia, D. Rodriguez-Aparicio
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    ABSTRACT: The six-port network has been identified in recent years as the best candidate to implement a Software Defined Radio (SDR). However, it is difficult in practice to implement a device without impairments if a broadband design is addressed. In this paper we present a three octave six-port network, covering the frequency range from 698 MHz to 5850 MHz. The six-port network is part of a SDR receiver prototype for a novel broadband mobile communications system. It has been measured with good performance.
    Microwave Conference (EuMC), 2010 European; 10/2010
  • C. de la Morena-Álvarez-Palencia, M. Burgos-García
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    ABSTRACT: This paper presents a Software Defined Radio (SDR) six-port receiver for a novel broadband mobile communications system. The prototype covers the frequency range from 700 MHz to 6 GHz, and operates with up to 100 MHz-wide channels. We have validated the prototype with several types of modulation schemes at different frequency bands. The six-port receiver has been satisfactory proved for data rates up to 75 Mb/s (limited by the available test instruments). The measured results show good performance of the implemented six-port receiver.
  • C. de la Morena-Alvarez-Palencia, M. Burgos-Garcia, F. Perez-Martinez
    The Open Electrical & Electronic Engineering Journal 01/2008; 2(1):45-49.
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    ABSTRACT: This paper presents a portable radar sensor developed in the Universidad Politecnica de Madrid. The system transmits a Linear Frequency Modulated Continuous Wave (LFM-CW) with two-antenna configuration for transmission and reception. The radar transmits at millimeter-wave band with a maximum bandwidth of 2 GHz and a transmitted power of 1 W. The system is modular, compact and lightweight. The sensor allows range intervals tuning and sampling the received signals with a constant rate. By this, it is particularly attractive for portable applications. Finally, the system performance has been tested in a traffic surveillance experiment.
    Sensor Technologies and Applications, 2007. SensorComm 2007. International Conference on; 11/2007