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difference between cdma and wcdma planning
actually why do you guys call wcdma to be an evolution of gsm..there is a big difference in the multiple access..in gsm a user's bw is in the order of say 20khz. But in WCDMA its in the order of MHz..am i right?
wireless jobs
Do you guys know of any job openings in the field of multiuser mimo, ofdm. I am mostly interested in jobs with theoretical emphasis...
thanks for the help!
I am wondering whether WimAX is an alternative to cellular systems ?
What is the typical no of tx-rx antennas for wimax..
what are the standards being developed...
802.16 e, j anything else ?
why do we need to do modulation
Why is modulation required from an antenna perspective.
I know the antenna size should be in the order of the carrier wavelength. Thats why we go for higher frequencies.
Is there any power connotation to that : like higher frequencies require less power ?
Re: unable to solve this problem - (access points & hand
Here is my solution steps.
1. Mark the points on the plane. It has 4 quadrants. (AP1 on y-axis and AP-2 on x-axis).
2. The problem is to find regions on that space where BER is more than 10%.
3. Choose any point on the plane. Find...
Please understand...
What is the source of noise?
the noise is due to thermal noise at the receivers.
the reason..receive antennas respond to the electromagnetic waves which may vary slightly. i think it is called shot noise.
But amplifier noise is the main one where external temperature...
I would like to gain more perspectives on how Shannon's great challenge was solved.
What is special about the Turbo Codes?
Why do we need coded modulation?
@sohilitri
Well, it is not neccesarily true that MSB error prob is less than LSB error probability.
Consider QPSK or 4-QAM as shown in the following.
00 01
10 11
Here both LSB and MSB error are equiprobable.
Then what is the significance of the symbol to bit encoding?
Well, to making...
Re: anybody interested in cooperative communication and rela
does relaying have any realistic chance of getting standarized for Wimax? Seems intel is into Wimax bigtime.
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