We propose a novel method for mitigating erroneous wake-ups that are commonly associated with ultra-low power wake-up receivers. Recent research in low-power protocols has demonstrated significant improvements in energy-efficiency by employing ultralow power wake-up receivers. However, due to the low-complexity receiver structures adopted, wake-up receivers are susceptible to external interfere...

Reliable estimation of users’ channels and data in rapidly time varying fading environments is a very challenging task of multiuser detection (MUD) techniques that promise impressive capacity gains for interference limited systems such as non-orthogonal CDMA and spatial multiplexing MIMO based LTE. This paper analyzes relative channel estimation error performances of conventional single user an...

Our previous work introduced a stochastic framework for studying watermarking. When the receiver used direct correlation detection and the attack employed linear shift-invariant (LSI) ltering, the optimal attack consisted of Wiener ltering and adding noise. Resisting the Wiener attack led to a power-spectrum condition (PSC): the watermark and original power spectra should be directly proportion...

n this work we examine blind adaptive and iterative decision feedback (DF) receivers for direct sequence code division multiple access (DS-CDMA) systems in frequency selective channels. Code-constrained minimum variance (CMV) and constant modulus (CCM) design criteria for DF receivers based on constrained optimization techniques are investigated for scenarios subject to multipath. Computational...

To quantify uncertainties in the acoustic field and associated probabilities of the detection and false alarm rate we use concept of a scattering matrix (SM) for acoustic modes. SM describes the process of transformation of modes when propagating through inhomogeneous region. SM depends on the parameters of the inhomogeneities but does not depend on coordinates of the source and receivers. Thus...

In [1], [3], the authors proposed two Fractionally Spaced (FS) Decision Feedback Equalising (DFE) receivers performing Single User Detection (SUD) or Joint Detection (JD) used in Non Cyclic Prefixed (NCP) Multi CarrierCDMA (MC-CDMA) schemes. The objective of this paper is to compare the performance of the above two equalising schemes, against a simpler receiver structure consisting by a single-...

Non-coherent receivers have become promising candidates for low complexity and low power ultra wide band (UWB) systems.Wediscuss the performance of energy detection and differential detection in additive white Gaussian noise, Rayleigh fading, and multipath environments. It is shown that non-coherent receivers can easily collect the multipath energy by means of equal gain combing. The loss (comp...