Aufgaben:Exercise 1.1Z: ISDN Connection - Revision history

Hwang at 15:35, 23 January 2023

2023-01-23T15:35:54Z

Guenter at 10:07, 22 May 2021

2021-05-22T10:07:33Z

Guenter at 08:56, 8 April 2021

2021-04-08T08:56:32Z

Guenter at 08:53, 8 April 2021

2021-04-08T08:53:58Z

Guenter at 08:49, 8 April 2021

2021-04-08T08:49:11Z

Guenter at 08:48, 8 April 2021

2021-04-08T08:48:18Z

Guenter: Guenter moved page Aufgaben:Exercise 1.1Z: ISDN-Connection to Aufgaben:Exercise 1.1Z: ISDN Connection

2021-04-08T08:45:50Z

Guenter moved page Exercise 1.1Z: ISDN-Connection to Exercise 1.1Z: ISDN Connection

Javier: Text replacement - "Category:Exercises for Signal Representation" to "Category:Signal Representation: Exercises"

2021-03-23T12:39:40Z

Text replacement - "Category:Exercises for Signal Representation" to "Category:Signal Representation: Exercises"

Noah at 12:47, 25 December 2020

2020-12-25T12:47:28Z

Noah at 11:26, 22 December 2020

2020-12-22T11:26:54Z

@@ Line 29: / Line 29: @@
 {Which of the statements are true regarding source and transmitter?
 |type="[]"}
-+ The message source is the caller.&nbsp; The source signal&nbsp; ${q(t)}$&nbsp; is the acoustic wave of her voice signal.
++ The message source is the caller.&nbsp; The source signal&nbsp; ${q(t)}$&nbsp; is the acoustic wave of her speech signal.
 + The unit labelled&nbsp; "transmitter"&nbsp; contains, among other things, a signal converter and a modulator.
 - The transmitted signal&nbsp; $s(t)$&nbsp; is analog.

← Older revision		Revision as of 10:07, 22 May 2021
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−	{{quiz-Header\|Buchseite=~~Signaldarstellung~~/~~Prinzip der Nachrichtenübertragung~~}}	+	{{quiz-Header\|Buchseite=Signal_Representation/Principles_of_communication}}

	[[File:EN_Sig_Z_1_1.png\|right\|frame\|A telephone connection scenario]]		[[File:EN_Sig_Z_1_1.png\|right\|frame\|A telephone connection scenario]]

@@ Line 58: / Line 58: @@
 *The message sink is the answering machine.
 *In an ideal transmission system&nbsp; $v(t) = {q(t)}$&nbsp; should apply.
-*However, due to the additive noise term&nbsp; ${n(t)}$, the attenuation&nbsp; $\alpha$&nbsp; and the running time&nbsp; $\tau$&nbsp; the following applies here:
+*However,&nbsp; due to the additive noise term&nbsp; ${n(t)}$,&nbsp; the attenuation&nbsp; $\alpha$&nbsp; and the delay time&nbsp; $\tau$&nbsp; the following applies here:
 :$$v(t) = \alpha \cdot q ( t - \tau) + n(t).$$
 *By our definitions, this is a distortion-free system.

@@ Line 27: / Line 27: @@
 <quiz display=simple>
-{Which of the statements are true regarding source and sender?
+{Which of the statements are true regarding source and transmitter?
 |type="[]"}
-+ The news source is the caller. The source signal&nbsp; ${q(t)}$&nbsp; is the acoustic wave of her voice signal.
++ The message source is the caller.&nbsp; The source signal&nbsp; ${q(t)}$&nbsp; is the acoustic wave of her voice signal.
-+ The unit labelled "transmitter" contains, among other things, a signal converter and a modulator.
++ The unit labelled&nbsp; "transmitter"&nbsp; contains, among other things, a signal converter and a modulator.
 - The transmitted signal&nbsp; $s(t)$&nbsp; is analog.
-{Which of the statements are true regarding recipients and sinks?
+{Which of the statements are true regarding receiver and sink?
 |type="[]"}
 - The received signal&nbsp; $r(t)$&nbsp; is digital.
-- The news sink is the telephone set in Hamburg.
+- The message sink is the telephone set in Hamburg.
-+ The news sink is the answering machine.
++ The message sink is the answering machine.
-+ The following applies&nbsp; $v(t) = \alpha \cdot q(t - \tau ) + {n(t)}$.
++ The following applies:&nbsp; $v(t) = \alpha \cdot q(t - \tau ) + {n(t)}$.
 - There is an ideal transmission system.

← Older revision		Revision as of 08:49, 8 April 2021
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−	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the [[Signal_Representation/Principles_of_Communication#~~Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems~~\|theory section]] .	+	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the [[Signal_Representation/Principles_of_Communication#Block_diagram_of_a_communications_system\|theory section]] .

@@ Line 1: / Line 1: @@
 {{quiz-Header|Buchseite=Signaldarstellung/Prinzip der Nachrichtenübertragung}}
-[[File:EN_Sig_Z_1_1.png|right|frame|a telephone connection scenario]]
+[[File:EN_Sig_Z_1_1.png|right|frame|A telephone connection scenario]]
 We consider the scenario shown in the picture:
-A woman from Munich dials a number in Hamburg with her ISDN phone. However, she cannot reach the person she wants to talk to, so she leaves him a message on tape.
+A woman from Munich dials a number in Hamburg with her ISDN phone.&nbsp; However, she cannot reach the person she wants to talk to, so she leaves him a message on tape.
 The distortion-free connection is fully described by
 * an attenuation coefficient &nbsp; $\alpha$,
-* a term&nbsp; $\tau$, and
+* a term&nbsp; $\tau$&nbsp; and
-* the current signal-to-noise ratio (SNR)
+* the current signal-to-noise ratio (SNR).
@@ Line 19: / Line 19: @@
-''Notes:'' &nbsp;The task shall establish a relation between this real scenario and the functional units of a general message transmission system mentioned in the&nbsp;[[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems|theory section]]&nbsp;.
+''Notes:'' &nbsp;The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the&nbsp;[[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems|theory section]]&nbsp;.

← Older revision	Revision as of 08:45, 8 April 2021
(No difference)

← Older revision		Revision as of 12:39, 23 March 2021
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−	[[Category:~~Exercises for~~ Signal Representation\|^1.1 Principles of Communication^]]	+	[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]

@@ Line 50: / Line 50: @@
 '''(1)'''&nbsp;  The <u>first two statements</u> are correct:
 *The speech signal&nbsp; ${q(t)}$&nbsp; must first be converted into an electrical signal and then prepared for transmission.
-*For ISDN the transmitted signal is&nbsp; ${s(t)}$&nbsp; digital.
+*For ISDN the transmitted signal&nbsp; ${s(t)}$&nbsp; is digital.
@@ Line 56: / Line 56: @@
 '''(2)'''&nbsp; Correct are the <u>solutions 3 and 4</u>:
 *The received signal&nbsp; ${r(t)}$&nbsp; is always analog due to the unavoidable thermal noise.
-*The message sink is the answering machine
+*The message sink is the answering machine.
 *In an ideal transmission system&nbsp; $v(t) = {q(t)}$&nbsp; should apply.
-* Due to the additive noise term&nbsp; ${n(t)}$, the damping&nbsp; $\alpha$&nbsp; and the running time&nbsp; $\tau$&nbsp; but applies here:
+*However, due to the additive noise term&nbsp; ${n(t)}$, the attenuation&nbsp; $\alpha$&nbsp; and the running time&nbsp; $\tau$&nbsp; the following applies here:
 :$$v(t) = \alpha \cdot q ( t - \tau) + n(t).$$
 *By our definitions, this is a distortion-free system.

← Older revision		Revision as of 11:26, 22 December 2020
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−	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general message transmission system mentioned in the  [[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems\|theory section]] .	+	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general message transmission system mentioned in the [[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems\|theory section]] .