Exam 8: Designing Signals for Multiple-Access Systems

An FDMA data signal duration $\mathrm { T } _ { \text {FDMA } } = 0.25 \mathrm {~ms}$ The fundamental frequency equals f $\mathrm { f } _ { 1 } =\_\_\_\_\mathrm { kHz. }$

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Question 1

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$\mathrm { f } _ { 1 } = 1 / \mathrm { T } _ { \text {FOMA } } = 1 / 0.25 \mathrm {~ms} = 4 \mathrm { kHz }$

An FDMA data signal duration is $\mathrm { n } _ { \mathrm { x } } = 100$ samples, the maximum number of users equals $\mathrm { n } _ { \mathrm { u } } =\_\_\_\_$

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$f _ { 1 } = 1 / n _ { x } .$ The maximum frequency by Nyquist criterion equals $\mathrm { f } _ { \max } < \mathrm { nx } / 2.$ Hence, the maximum $\text { number of harmonics } = n _ { x } / 2 - 1 = 49.$

If an FDMA data signal interval generates $n _ { x } = 100$ samples with sampling period $\mathrm { T } _ { 5 } = 0.1$ ms, the duration of the interval $\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$

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$\mathrm { T } _ { \mathrm { FDMA } } = \mathrm { n } _ { \mathrm { x } } \mathrm { T } _ { \mathrm { s } } = 10$

An FDMA data signal duration $\mathrm { T } _ { \text {FDMA } } = 0.25 \mathrm {~ms}$ The fundamental frequency equals f $\mathrm { f } _ { 1 } =\_\_\_\_\mathrm { kHz. }$

An FDMA data signal duration is $\mathrm { n } _ { \mathrm { x } } = 100$ samples, the maximum number of users equals $\mathrm { n } _ { \mathrm { u } } =\_\_\_\_$

If an FDMA data signal interval generates $n _ { x } = 100$ samples with sampling period $\mathrm { T } _ { 5 } = 0.1$ ms, the duration of the interval $\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$

Introduction

Sensors and Actuators

Combinational Logic Circuits

Sequential Logic Circuits

Converting Between Analog and Digital Signals

Modeling Random Data and Noise

Detecting Data Signals in Noise

Source Coding

Channel Coding

Data Networks

Symbology

Excel Best Practices

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Exam 8: Designing Signals for Multiple-Access Systems

An FDMA data signal duration TFDMA =0.25 ms\mathrm { T } _ { \text {FDMA } } = 0.25 \mathrm {~ms}TFDMA ​=0.25 ms The fundamental frequency equals f f1=____kHz.\mathrm { f } _ { 1 } =\_\_\_\_\mathrm { kHz. }f1​=____kHz.

An FDMA data signal duration is nx=100\mathrm { n } _ { \mathrm { x } } = 100nx​=100 samples, the maximum number of users equals nu=____\mathrm { n } _ { \mathrm { u } } =\_\_\_\_nu​=____

If an FDMA data signal interval generates nx=100n _ { x } = 100nx​=100 samples with sampling period T5=0.1\mathrm { T } _ { 5 } = 0.1T5​=0.1 ms, the duration of the interval TFDMA =___ms.\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.TFDMA ​=___ms.

Introduction

Sensors and Actuators

Combinational Logic Circuits

Sequential Logic Circuits

Converting Between Analog and Digital Signals

Modeling Random Data and Noise

Detecting Data Signals in Noise

Source Coding

Channel Coding

Data Networks

Symbology

Excel Best Practices

Filters

An FDMA data signal duration $\mathrm { T } _ { \text {FDMA } } = 0.25 \mathrm {~ms}$ The fundamental frequency equals f $\mathrm { f } _ { 1 } =\_\_\_\_\mathrm { kHz. }$

An FDMA data signal duration is $\mathrm { n } _ { \mathrm { x } } = 100$ samples, the maximum number of users equals $\mathrm { n } _ { \mathrm { u } } =\_\_\_\_$

If an FDMA data signal interval generates $n _ { x } = 100$ samples with sampling period $\mathrm { T } _ { 5 } = 0.1$ ms, the duration of the interval $\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$