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hi freind.
when signals arrive from different way and different direction to receiver, the phase of signals from different way will becom different , so if sum of these phases are constructive, the amplitiude of signal will high. and if sum of these phases are deconstructive, the amplitiude of...
Re: cdma or gsm
hi dear friend.
if we can overcom the problemas of cdma by developing technology, cdma is better. in 4th generration , will be used combination of cdma and ofdm that call MC-CDMA (multi carrier cdma). that is very robust method.
Re: filters
Hi friend.
I don't know which type of filter you want, analog or digital?
if you want digital type i can help you. you can contact with me to guid or send usefull document.
good by.
hi dear friend.
you can write code in C to interface 89s52 with PC by Keil software.
this software is very powerfull in programming and simulation of program in micro.
i suggest you to use this software to write code in C.
Good Lock.
transistor circuit analysis
hi friend.
I suggest you to understand many type of circuit, for example if you know current sourse circuit , you can recognize it in a big circuit . you shoud know any part of big circuit, amplifiers, filters, mixers, AGC,....
good lock
Re: mathematics
Hi.
Authers:
1- Henry Siggins Leonard .
2-William Gustason
3-Zhaohui Luo
4-Alfred Binet
5-Nancey C. Murphy
6-John A. Downing - Medical - 1979
7-Jovan Brkić - 1985
8-LLB. Sharon Hanson
9-Stella Vosniadou, Andrew Ortony - 1989
10-Susan Elizabeth Ryan, Elizabeth Anne McKay -...
Hi.
you can use simulation in matlab. In this, there are the m-psk block and qpsk block. U can set the options for your purpose.
I attached these blocks for you.
with regards.
Hi.
In the differential amplifier, the voltage that be amplified is differential input voltage. if one input is Vi and Other is -Vi, then the voltage in the output is
Vo=Ad*(2Vi). that Ad is differential gain in the differential amplifier.
regards.
matlab bandpass filter
I suggest you, 2 ways:
1- you can use Filter Design & Analysis Tools (fdatool) . This toolbox is very powerfull & very easy to use in filter design. you can choose BPF in option and then design how you want it.
2-you can use [b,a] = butter(n,Wn,'ftype')
If Wn is a...
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