# 1.9 Sampling ct signals: a frequency domain perspective

 Page 1 / 1
The module will provide an introduction to sampling a signal in the frequency domain and go through a basic example.

## Understanding sampling in the frequency domain

We want to relate ${x}_{c}(t)$ directly to $x(n)$ . Compute the CTFT of ${x}_{s}(t)=\sum$ x c n T t n T

${X}_{s}()=\int_{()} \,d t$ n x c n T t n T t n x c n T t t n T t n x n n T n x n n X
where $\equiv T$ and $X()$ is the DTFT of $x(n)$ .
${X}_{s}()=\frac{1}{T}\sum$ X c k s
$X()=\frac{1}{T}\sum$ X c k s 1 T k X c 2 k T
where this last part is $2\pi$ -periodic.

## Speech

Speech is intelligible if bandlimited by a CT lowpass filter to the band4 kHz. We can sample speech as slowly as _____?

## Relating x[n] to sampled x(t)

Recall the following equality: ${x}_{s}(t)=\sum x(nT)(t-nT)$

Recall the CTFT relation:

$(x(t), \frac{1}{}X(\frac{}{}))$
where  is a scaling of time and $\frac{1}{}$ is a scaling in frequency.
${X}_{s}()\equiv X(T)$

what are the factors effecting demand sedule
we should talk about more important topics, you can search it on Google n u will find your answer we should try to focus on how we can improve our society using economics
shubham
so good night
hon
ways of improving human capital
what is human capital
kelly
Capital can be defined as man made assets use in production .
Abdulai
What is the differences between central Bank And Commercial Bank ?. 2 for each
Abdulai
Two types of bank clearing house.
Abdulai
what are the most durable assets of a bank
Ngongang
What is Opportunity Cost?
may be defined as expression of cost in terms of forgone alternative.
Abdulai
Helloo, im new, can i get to know more?
You ask questions on any topics you find difficult.
Favour
What is opportunity cost?
Cephas
is price elasticity of demand the same as elasticity of demand
not really
Victoria
hi
Gh
hello
Bhartendu
i hope everyone be ok
Gh
No
Hassan
Favour
No
William
cleophas
price elasticity of demand is the reaction of customers /demand to price changes(increase or decrease) elasticity of demand is the reaction of prices brought about by the change in demand
Victoria
thank you
Favour
state the laws of demand and supply
William
dd: when price rises demand decreases whereas when price reduces dd rises ss: when ss rises the price rises and when ss decreases price also reduces. There is a positive relationship
Dhoonah
nice
Victoria
Draw a demand curve graph
William
though price elasticity and elasticity are used interchangeably, the demand can respond to income changes and prices of related goods as well.
Gurpalak
explain the difference between merit goods and public goods and show why it is possible for profit to be made in the supply of one of these types of good but not the other
Kavishek
Public goods are defined as products where, for any given output, consumption by additional consumers does not reduce the quantity consumed by existing consumers. Merit goods are, for example, education and to some extent the health-care. They are provided by state as "good for you".
ahmed
The ladies are doing much better than the men
Blacks
what happens when there is a shift in demand curve?
Favour
What is Specialization ? Explain in detail
any one ?
specialisation is a method of production whereby an entity focuses on the production of a limited scope of goods to gain a greater degree of efficiency.
Favour
It's ok
hello
Onome
yah
Abdulai
No. price elasticity of demand refers to the manna in which price of good demanded fluctuate mean while elasticity of demand explains the way consumer change in their willingness as they plan or purchase a good
Ngongang
diffirence between demand and supply
Bonny
what is economic
It is a social science which studies human behavior as a relationship between ends and scarce which have alternative uses
Obeng
what is norminal wage
is the wages measured in money as distinct from actual purchasing power
Favour
what is demand curve
this is a curve that slop downward from left to rich
Obeng
yes
Basanta
different between capital and wealth
Wealth refers to the amount of asset you have, while, capital is the amount of cash money you have with you now and willing to invest in any business.
Favour
What is scale of reference?
What is monopoly?
Finda
It is the control of market by single seller or producer
Mayen
the exclusive possession or control of the supply or trade in a commodity or services
Brains
what is scarcity
scarcity means that the resources which we can produce goods and services relatives to wants for them.
Bonny
what is demand
demand means that's good demand according to your needs is called demand
Bonny
needs of people ar called demand
Francis
what's the difference between opportunity cost and production possibility curve?
Francis
apportunity cost means a goods which can be replace by other goods without any ease of saticfaction
Bonny
different between capital and wealth
Samuel
apportunity cost means the profit lose when one alternative is selected over other
Bonny
what is economocs
Economics is a science which studies human behaviour as a relationship between ends and scarce means which have alternative uses.
Abubakari
It deals with making choices in the face of scarcity
Abu
what is perfect complements?
Bilal
what is scarcity
Bonny
difference between fixed policy and monetary policies
Difference between extinct and extici spicies
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
in a comparison of the stages of meiosis to the stage of mitosis, which stages are unique to meiosis and which stages have the same event in botg meiosis and mitosis
Got questions? Join the online conversation and get instant answers!