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Exercise 1.3Z: Rayleigh Fading Revisited
...ultiplicative factor  $z(t) = x(t) + {\rm j} \cdot y(t)$  of two mobile radio channels  (both without multipath propagation)  in 2D&ndash \begin{array}{*{1}c} {\rm for}\hspace{0.15cm} a \ge 0

7 KB (1,117 words) - 16:43, 28 May 2021
Exercise 2.7Z: Coherence Bandwidth of the LTI Two-Path Channel
For the GWSSUS model, two parameters are given, which both statistically captur *Both definitions are only partially suitable for a time-invariant channel.

10 KB (1,500 words) - 13:41, 17 February 2022
Exercise 4.2Z: MIMO Applications in LTE
...Output"  $\rm (MIMO)$  is not an LTE specific development.  For example, WLAN also uses this method. *a  "Diversity Gain"  and a  "Data Rate Gain"  for multiple connections,

6 KB (988 words) - 14:37, 23 March 2021
Theory of Stochastic Signals/Further Distributions
...gative values and the probability density function  $\rm (PDF)$  for  $x \ge 0$  has the following shape with the distribution parame ...sp; [[Mobile_Communications/Probability_Density_of_Rayleigh_Fading|"Mobile Communications"]].

12 KB (1,790 words) - 11:03, 22 December 2022
Exercise 3.7: PN Modulation
[[File:P_ID2259__Mod_Z_5_2.png|right|frame|Equivalent models for "PN modulation" and "BPSK"]] ...S$  in the equivalent low-pass range, where  $n(t)$  stands for AWGN noise.

5 KB (866 words) - 14:38, 23 March 2021
Exercise 4.2: UMTS Radio Channel Basics
*${\rm Multipath\:propagation}$:  The signal reaches the mobile receiver not only through the direct path,  but through several paths In the book  "[[Mobile Communications]]"  these effects have already been discussed in detail. The diagrams

6 KB (907 words) - 17:26, 13 February 2023
Exercise 3.8: OVSF Codes
The spreading codes for UMTS should ...$\langle c_\nu^{(0)}\rangle, \text{...} ,\langle c_\nu^{(7)}\rangle$  for the spreading factor  $J = 8$. 

6 KB (875 words) - 14:37, 23 March 2021
Exercise 5.9: Selection of OFDM Parameters
of two mobile radio channels]] In this exercise,  some OFDM parameters of a mobile radio system are to be determined.  

6 KB (949 words) - 13:13, 25 January 2022
Exercise 1.5: Reconstruction of the Jakes Spectrum
In a mobile radio system, the  [[Mobile_Communications/Statistische_Bindungen_inne ...with_Rayleigh.E2.80.93Fading|Jakes spectrum]], which is shown in the graph for the maximum Doppler frequency $f_{\rm D, \ max} = 100 \ \rm Hz$.  ${\i

6 KB (965 words) - 13:41, 17 February 2022
Exercise 2.3: Yet Another Multi-Path Channel
...h_Reception_in_Mobile_Communications| Multi–Path Reception in Mobile Communications]]. * For the solution of subtask  '''(1)'''  assume that the impulse respo

8 KB (1,234 words) - 09:04, 26 May 2021
Exercise 4.4Z: Physical Channels in LTE
All information required for the task can be found on these pages. ...hapter  [[Mobile_Communications/Physical_Layer_for_LTE|Physical Layer for LTE]].

5 KB (734 words) - 14:37, 23 March 2021
Exercise 2.1: Two-Dimensional Impulse Response
...hannel_Model|The GWSSUS channel model]], especially in the sample solution for the  [[Aufgaben:Exercise_2.7Z:_Coherence_Bandwidth_of_the_LTI_Two-Path ....  Therefore  $T$  is to be interpreted here as very large, for example one hour.

6 KB (1,011 words) - 11:01, 11 October 2021
Exercise 3.8: General Packet Radio Service
A GPRS mobile subscriber benefits from shorter access times and the higher data rate comp *For GPRS,  up to eight time slots can be combined  $($"multislot capa

7 KB (1,064 words) - 19:30, 28 January 2023
Exercise 1.6: Autocorrelation Function and PDS with Rice Fading
[[File:P_ID2132__Mob_A_1_6.png|right|frame|Rice PDF for different values of  $z_0^2$]] ...Rice fading"  if the complex factor  $z(t)$  describing the mobile radio channel contains besides the purely stochastic component  $x(t)

9 KB (1,384 words) - 16:06, 17 February 2022
Exercise 2.6: Dimensions in GWSSUS
The mobile radio channel can be described in very general terms by four system functio ...$because of German  $\rm V\hspace{-0.05cm}$erzögerung$)$  stands for delay time  $\tau$  $($index  $i_1)$,

8 KB (1,313 words) - 13:41, 17 February 2022
Examples of Communication Systems/General Description of GSM
|Untermenü=GSM – Global System for Mobile Communications ...  and thus belongs to the second generation  $\rm (2G)$  of mobile phone systems.

22 KB (3,351 words) - 15:58, 20 February 2023
Exercise 2.5: Scatter Function
For the mobile radio channel as a time-variant system, there are a total of four system fu ...r representation  $\eta_{\rm FD}(f, \hspace{0.05cm}f_{\rm D})$.  For which values of  $f_{\rm D}$ is this function <b>not</b> equal to zero

10 KB (1,599 words) - 14:37, 23 March 2021
Exercise 1.1Z: Simple Path Loss Model
...erized by the path loss exponent  $\gamma = 2$. However, the equation for the free-space attenuation only applies in the <i>far-field</i>, i.e. when {Which signal frequencies are the basis for the scenarios  $\rm (A)$  and  $\rm (B)$ ?

5 KB (779 words) - 14:37, 23 March 2021
Exercise 4.3: Subcarrier Mapping
For the number of interpolation points of DFT and IDFT, realistic numerical val ...th by the  "subcarrier mapping".  The smallest addressable block for LTE is  $180 \ \rm kHz$.  With  the subcarrier spacing of&nb

6 KB (915 words) - 14:43, 17 November 2022
Exercise 2.5Z: Multi-Path Scenario
[[File:EN_Mob_A_2_5Z.png|right|frame|Mobile radio scenario with three paths]] Now, we try to find a mobile radio scenario in which this scatter function would actually occur.  T

8 KB (1,312 words) - 14:38, 23 March 2021