phase sensitive detector described here has two principal applications: a- to produce a d.c out put proportional to- the amplitude of an incoming a,c signal and indicate, by the outut polarity, the phase of the signal with respect to an internal reference. b- to detect the presence of a signal of known phase and frequency which would otherwise be lost in «background noise» and to measure its am...

in this paper a new algorithm is presented for coherent radar detection of targets, when distribution of the interference (clutter and noise) is non-gaussian. the neyman-pearson criterion is used for optimal detection and several successive received samples from a radar range cell are used for detection in the same cell. on the basis of recent empirical evidences, the interference distribution ...

Recently, an optimum structure of the discrete time Rake receiver according to the maximum a posteriori criterion has been proposed. The obtained receiver, known as the decorrelating discrete time Rake receiver (DDRR), uses estimates of the channel statistics in order to compute its decision variable. In this letter, we study the DDRR robustness in the presence of dynamic statistics due to birt...

In speech recognition, a discriminative quefrency weighting can be achieved by somewhat decorrelating the frequency sequence of log mel-scaled filter-bank energies with a computationally inexpensive filter. In this paper, we show how the spectral parameters that result from this kind of frequency filtering, both alone and combined with filtering of their time trajectories, are competitive with ...

Third-generation mobile radio networks have been under intense research. Code division multiple access (CDMA) has emerged as the mainstream air interface solution for the third-generation networks. Multiuser detection is a necessary means for CDMA systems to reduce effect of multiple access interference and hence increase system capacity and alleviate near-far problem. The global maximum likeli...