Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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 $$\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$$

Accepted Answer

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

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 $\mathrm { f } _ { 1 } =\_\_\_\_\mathrm { kHz. }$

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 $\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$

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.

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 $\mathrm { T } _ { \text {FDMA } } =\_\_\_\mathrm { ms }.$