Carlos J. Escudero

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This paper deals with the problem of blind interference suppression in Direct-Sequence Code Division Multiple Access (DS/CDMA) channels. We investigate the incorporation of linear constraints to the Constant Modulus (CM) criterion to obtain a new blind adaptive receiver that only requires chip synchronization and acquisition of the desired user code. An(More)
—In this correspondence, we reply to the comments in Gu et al. [ " Comments on 'A blind signal separation method for multiuser communications,' " We explain that the global convergence analysis of the method in Castedo et al. [ " A blind signal separation method for multiuser communications, " IEEE Transactions on Signal Processing,] can be completed as an(More)
The problem of blind channel identiication for Direct-Sequence/Code-Division Multiple-Access (DS/CDMA) multiuser systems is explored. For wideband DS/CDMA signals, multipath distortion is well modeled by a a nite-impulse response model. In this work, a blind channel identiication technique based on second order statistics is investigated. The method(More)
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The IEEE 802.11p standard has been optimized for low-delay small-bandwidth wireless communications to provide vehicular safety services. However, IEEE 802.11p transceivers can considerably improve their robustness by incorporating MIMO transmission methods. Moreover, multiple antennas can also be used to increase the data transfer rate of IEEE 802.11p(More)
— Positioning systems based on sensor networks is one of the most promising ſelds in mobile computing. This paper considers the bluetooth standard to locate devices using the RSSI (Received Signal Strength Indicator). The major problem of working with this parameter is its ƀuctuation that happens very fast due to changes in the environment. These changes(More)
Finite length CMA equalizers contain undesired minima termed Length Dependent Local Minima (LDLM). We note that for auto-regressive (AR) channels, the equalizer output is correlated with a delayed input at these minima. This property is then used to modify the CMA cost function and remove the LDLM in AR channels. Permission to publish this abstract(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t The use of personal protective equipment (PPEs) in the construction(More)