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Absir-mi -In this paper we consider the application of some adaptive algorithms for the antenna array beam steering. Three spatial channel models ( Lee's Model, Gaussian Angle of Arrival Model and Discrete Uniform Distribution Angle of Arrival Model) and 12 -element antenna array are simulated. The antenna array beam steering is performed by using the adaptive algorithms: Least Mean Sgziare -LMS, Least Mean Fourth -LMF, Recursive Least Square -RLS and Sample Matrix Inversion -SMZ. The output antenna array SNIR is analyzed and plotted relating to the angular width and the iteration number the adaptive algorithms.

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Realization of modern telecommunication systems is inconceivable without use of different binary sequences. In this paper, an overview of random binary sequences used in different telecommunication systems is given. Basic principles of pseudorandom, chaotic, and true random sequence generation are presented, as well as their application in telecommunications in respect to advantages and drawbacks of the same. Moreover, particular scheme for true random binary sequence generation is given, as well as results of randomness assessment obtained by NIST statistical test suite. Finally, short insight into importance of random binary sequence in secure communications is given.K e y w o r d s: binary sequences, pseudo-random sequences, chaotic sequences, true random sequence, secure communication, cryptography, quantum cryptography