The work reported in this paper deals with the impact of a nonlinear channel with noise in a FDMA system.The system is simulated using a time domain simulator,based on simulink. Five GSM channels are combined andthen traverse a nonlinear noisy channel.Finally some results are discussed.. ; O trabalho apresentado neste artigo, analisa o impacto de um canal não-linear com ruído, num sistema FDMA.O ...
This paper describes the design, implementation and test of a Repeater for the Radio Sub-System of UMTS Networks.First of all, the integration of a Repeater in the UMTS System is presented, defining the goals in view (Section I).Then, the general Repeater specifications and architectureare addressed (Section II), which then led to its implementation (Section III). Section III also details th...
; Este artigo visa antes de mais dar a conhecer os diferentes métodos de introdução de texto, com ênfase nas tecnologias predictivas, em contraste com os métodos anteriores que implicavam grande esforço por parte do utilizador para redigir a sua mensagem.Inicialmente leva-se a cabo uma descrição do conceito de SMS, o seu crescimen...
The nonlinear distortion of a PLL frequency discriminator is addressed using the Volterra Series approach. The analysis, made entirely in the frequency domain, allows distortion calculations for periodic and nonperiodic sets of discrete excitation frequencies (harmonic and intermodulation distortion up to 3rd order) and random inputs. It also includes, simultaneously, the two major...
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