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Re: Cyclic Prefix
Hi,
In OFDM based communication a guard interval needs to be inserted in order to avoid intersymbol interference. The duration of the guard interval should be equal to the maximum delay spread of the channel.
If the guard interval is transmitted with zeros. Then the carriers...
books physical layer of wimax
Hi Thank you once again... This is very useful paper.
Can you provide me matlab files used in this paper for the simulation. You can send the same to me also at my email id "kamalkgarg@gmail.com"
Thanks again :)
simulink music
I hope this can only be done if the spectrum contained by vocal & guitar. So if you are able to find the band occupied by the two then you can use filter design toolbox aviable in the matlab to filter out any of the two.
projects using ofdm
Practical implementation of OFDM is not very difficult using DSP processor. As for OFDM IFFT & FFT are required to be computed at the Tx & Rx respectively.
advantages of digital over analog communication
Digital communication has many advantages over analog communication. few of them are-
1) various types of data (text, speech, video, image) once converted into a binary stream can be processed by one system. In contrast different analog systems...
NEED HELP...........
I am facing problem in downloading few of the good commuication books as recommended by you from rapidshare.com.
It asks for user name and password.
Password is usually provided there. But user name is not mentioned........
What should I put as user name??
I am facing very fundamental problem in channel estimation in wireless communication.
In channel estimation we usually find the impulse response of channel.
But what will be the impulse response of frequency flat/selective fading channel (time varying/time invariant)? and how will it be...
cyclic prefix circular convolution
Cyclic prefix is used to avoid intersymbol interference(ISI) which is a common phenonmenon in frequency selective channel. Usually length of the CP is kept greater or atleast equal to the length of the channel impulse response.
You may find answer in chapter 14 of the following book
Principle of communication system simulation with Wireless applications...
By William H. , Tranter, K. S. Shanmugan, T. S. Rappaport..
attached chapter 14 of the book
If you are from electronics field then you should perfer digital communication.
If from Computer Science its better to go for computer network communication.
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