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Signal Representation/Harmonic Oscillation
|Vorherige Seite=Direct Current Signal - Limit Case of a Periodic Signal ...as well as in many natural sciences.  The diagram shows an exemplary signal waveform.

15 KB (2,344 words) - 17:39, 9 June 2023
Signal Representation/Discrete-Time Signal Representation
|Untermenü=Time and Frequency-Discrete Signal Representation |Vorherige Seite=Equivalent Low-Pass Signal and Its Spectral Function

18 KB (2,937 words) - 14:51, 22 June 2023
Signal Representation/Signal classification
...system,  both  deterministic signals  and  stochastic signal  occur. A  »'''deterministic signal'''«  exists,  if its time function  $x(t)$  can b

16 KB (2,524 words) - 14:46, 22 June 2023
Mobile Communications/Non-Frequency-Selective Fading With Direct Component
...e stray components  $(2\sigma^2)$  the better suited for digital signal transmission is the mobile communication channel. == Example of signal behaviour with Rice fading==

7 KB (1,061 words) - 16:55, 3 February 2023
Signal Representation/Discrete Fourier Transform (DFT)
|Untermenü=Time and Frequency-Discrete Signal Representation |Vorherige Seite=Discrete-Time Signal Representation

20 KB (3,186 words) - 17:57, 28 June 2023
Mobile Communications
*Many of the fundamentals covered in the book  »[[Signal Representation]]«  are still valid.  Differences arise from the radio chan ===Exercises and multimedia===

4 KB (530 words) - 13:27, 3 April 2023
Modulation Methods/General Model of Modulation
The two input signals and the output signal have the following characteristics: ...low-frequency message signal and has the spectrum  $Q(f)$.  This signal is continuous in value and time and limited to the frequency range  $|

17 KB (2,756 words) - 19:09, 12 January 2023
Linear and Time Invariant Systems/System Description in Time Domain
...al Representation»  it was explained that for any deterministic signal  $x(t)$  a  »spectral function«  $X(f)$&nbs ...mation about the spectral function is already contained in the time domain representation, even if not always immediately recognizable.  The same facts apply to

14 KB (2,235 words) - 18:21, 2 November 2023
Theory of Stochastic Signals/Probability Density Function (PDF)
...D41__Sto_T_3_1_S1_neu.png |right|frame| Signal and PDF of a Gaussian noise signal]] The graphic shows a section of a stochastic noise signal  $x(t)$  whose instantaneous value can be taken as a continuous r

11 KB (1,672 words) - 11:32, 12 April 2023
Signal Representation/Fourier Series
The  »'''Fourier series'''«  of a periodic signal  $x(t)$  is defined as follows: ...e  »'''basic circular frequency'''«  of the periodic signal  $(T_0$ is the period duration$)$.}}

20 KB (3,164 words) - 18:21, 15 November 2023
Theory of Stochastic Signals/Stochastic System Theory
*the structure and representation of  »digital filters«  (non-recursive and recursive), ...operties of the  »Wiener-Kolmogorow filter«  for the signal reconstruction.

17 KB (2,779 words) - 11:17, 22 December 2022
Signal Representation/Principles of Communication
|Vorherige Seite=Signal Representation |Nächste Seite=Signal Classification

17 KB (2,614 words) - 19:56, 6 June 2023
Modulation Methods/Further AM Variants
[[File:EN_Mod_T_2_5_S1.png|right|frame|Spectrum  (of the analytical signal)  for vestigial sideband amplitude modulation]] In this schematic representation,  one recognizes:

8 KB (1,275 words) - 11:52, 13 January 2023
Mobile Communications/General Description of Time Variant Systems
...tem}$  with the signal  $s(t)$  at the input and the output signal  $r(t)$.   For the sake of simplicity, let  $s(t)$  and ...verse Fourier transform}$]]  of  $H(f)$.    The output signal results from the convolution:

10 KB (1,542 words) - 15:41, 29 January 2023
Theory of Stochastic Signals/Uniformly Distributed Random Variables
$\text{Example 1:}$  The graph shows two signal waveforms with uniform amplitude distribution. ...given.  Rather,  this sawtooth signal represents a deterministic signal.}}

11 KB (1,638 words) - 19:01, 20 February 2024
Modulation Methods/Direct-Sequence Spread Spectrum Modulation
...itter-side carrier signal  $z(t)$  and the receiver-side carrier signal   $z_{\rm E}(t) =2\cdot z(t)$  are omitted. ...;$z(t)$  and AWGN noise, characterized by the additive Gaussian noise signal  $n(t)$.  The second interference component  (interference f

13 KB (2,071 words) - 17:13, 19 January 2023
Modulation Methods/Single-Sideband Modulation
...lated signal  $s(t)$  requires twice the bandwidth of the source signal  $q(t)$. In this representation,  one can see:

14 KB (2,244 words) - 14:43, 18 January 2023
Modulation Methods/General Description of OFDM
*Instead of a broadband,  strongly modulated signal,  a large number of narrowband,  mutually orthogonal subcarriers ...t data rates for the subcarriers.  This means that a high-rate source signal must be split into several signals of significantly lower symbol rate for t

18 KB (2,900 words) - 18:31, 23 January 2023
Exercise 2.4Z: Repetition to IDFT
...r_Transform_(DFT)|"Discrete Fourier Transform"]]  of the book "Signal Representation" and is identical to the one there  [[Aufgaben:Exercise_5.2:_Inverse_D ...s thus describes the discrete form of the Fourier correspondence of the DC signal:

7 KB (1,085 words) - 20:22, 7 March 2023
Linear and Time Invariant Systems/Classification of the Distortions
Untermenü=Signal Distortion and Equalization ...'  is understood to be undesirable deterministic changes in a message signal caused by a transmission system. }}

14 KB (2,172 words) - 17:30, 9 November 2023