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what advantages lte can have wimax for wireless display
i am doing one research assignment, on wimax and lte comparison and feasibility for wireless display. during this my teacher told me one strange thing which i didnt know. he said lte can support one user continuously and it can better support constan...
Digital communication :: 17 Sep 2009 18:30 :: Usmanaih :: Replies: 0 :: Views: 186
what is best software to aid in antenna design?
hi all,may i know the pros and cons of the various commercial software for antenna design... example -->ansoft designer, microwave office etcthanksnewbie101...
RF, Microwave, Antennas and Optics :: 16 Sep 2009 15:49 :: 2009kucing :: Replies: 41 :: Views: 5010
sim300
hi everybody, is here any one working on sim300 if so, is there any thing to be added other than the circuit provided in schematics provided in ver 2.02. because i getting rdy after power on but its not detecting sim card when sim card is placed. i ...
Professional Hardware and Electronics Design :: 16 Sep 2009 9:54 :: mpch_elec :: Replies: 145 :: Views: 37840
gsm jammer
well as a small project one of my frnds wanted to design a gsm jammer circuit.what wud be the requirements for such a design. he wanted to know more abt this ckt.. is it possible to jam cdma signals.. as per my knoledge gsm operates at low power so i...
Hobby Circuits and Small Projects Problems :: 15 Sep 2009 18:39 :: AKSHAYVH :: Replies: 65 :: Views: 30185
wireless sensor network simulation using matlab
i am masters student doing my project in wsn. i want to know whether we can simulate wireless sensor network in matlab...
Digital communication :: 15 Sep 2009 16:41 :: Communications_Engineer :: Replies: 1 :: Views: 450
ofdm questions?
hello, all, i just studied the ofdm, and now some confused concepts occured in my brain, so your help is warmly welcomed, thanks a lot:1. is ifft itself can be treated as a modulation type in ofdm scheme?2. for each sub-carrier, can it be modulated b...
Digital communication :: 15 Sep 2009 16:38 :: Communications_Engineer :: Replies: 27 :: Views: 2328
where do rf engineers work?
hi all,i want to know the difference between an analog designer and an rf engineer?are rf engineers involved in both rf electronics, antennas and microwave design?or do they only do network planning and optimisation?do rf engineers work in mobile ope...
RF, Microwave, Antennas and Optics :: 15 Sep 2009 8:20 :: ChaoFan :: Replies: 4 :: Views: 327
booting pc from eprom
hi everyoneim tryin to boot my pc from eprom. i want to use my old pc in embeded design application free of hard disk or bootable floppy. for this i need to copy my file system, my executable files and dos startup files in eprom ( i guess). can anyo...
Hobby Circuits and Small Projects Problems :: 14 Sep 2009 12:48 :: lynchaj :: Replies: 12 :: Views: 4591
is anybody noticed the similarity between mrf49xa and silabs
hese two chips are seen as very similar and their datasheets have very similar figures.mrf49xa http://www.microchip.com/wwwproducts/devices.aspx?ddocname=en541404si4421 http://www.silabs.com/products/wireless/ezradio/pages/si442021.aspxdoes anybody k...
RF, Microwave, Antennas and Optics :: 14 Sep 2009 7:49 :: vfone :: Replies: 2 :: Views: 291
wine and centos5.3
i am new user in linux, i am not familiar with linux before.please help me i want to install trafinspag on centos 5.3, this is with .msi file extension .this is used in window to get internet connection.now i want to get internet connection in cento...
Linux Software :: 13 Sep 2009 20:17 :: htetlinnaung :: Replies: 6 :: Views: 629
final year project
plz give me an idea about final year projectthe project must be impressive oneproject should be mainly hardware based...
Microcontrollers :: 13 Sep 2009 20:13 :: pakitos :: Replies: 32 :: Views: 3327
wireless sensor networks simulation in matlab
hi, i am anandcan we simulate wireless sensor nodes in matlab?...
Network :: 12 Sep 2009 16:26 :: anand_nit :: Replies: 0 :: Views: 324
gsm simulation
hi every body...im working on channel allocation algorithms (fixed, dynamic, hybrid) in gsm network.....can anybody guide me, which simulator i should use to simulate gsm network...thanks...
Network :: 12 Sep 2009 8:28 :: gurgrewal :: Replies: 3 :: Views: 657
lm317 could power an 8v, 90ma mini camera?
good day! need some help from you guys. i was wondering if the lm317 (as simple as possibel) could power an 8v, 90ma mini camera? i was intending to use a 7.2/7.4v battery to power it. since the source is less than the required input voltage, would t...
Hobby Circuits and Small Projects Problems :: 11 Sep 2009 19:04 :: inakib :: Replies: 7 :: Views: 213
newbie with a wireless doorbell question.
i am very new to this stuff but am interested in learning. i would like to modify a wireless doorbell to be able to keep the power flowing for as long as the button is pressed, not just a on/off burst. i have no idea how to do this. can this be do...
Hobby Circuits and Small Projects Problems :: 11 Sep 2009 9:25 :: betwixt :: Replies: 1 :: Views: 111
need help in a module that detects wireless rf switches
hi,i would like to build a module that detects a number of separate wireless switches located across a room (maximum 16) either using rf, bluetooth or some other transmission method that does not require a “point to point” view (ie infrar...
Electronic Elementary Questions :: 08 Sep 2009 18:09 :: orchidboy :: Replies: 2 :: Views: 141
dhcp issue help me please.. anybody.. i have been facing..
hi all, i need a quick help please.i provide internet to other resident in same building. i use ip 3 router (act as a dhcp sever for my client) all room has lan cable connected to cisco switch and switch is then conneted to main ip 3 router. i have ...
Network :: 08 Sep 2009 0:37 :: tanbukhari :: Replies: 5 :: Views: 696
any thing about ofdm
hi all,i suggest to make this topic to be an open discussion about any thing in ofdm and to share any presented data.what is your opinion?...
Digital communication :: 07 Sep 2009 19:53 :: mashhur :: Replies: 24 :: Views: 2157
ac-dc power supply conversion - transformer selection
hi,i am designing one mini project.it requires ac-dc conversion as similar similar one used in the following university project. http://acme.cs.berkeley.edu/about.phpin this one, i have to select one transformer (power transformer) for my project. ap...
Hobby Circuits and Small Projects Problems :: 06 Sep 2009 6:53 :: nramesh :: Replies: 5 :: Views: 822
simple sbc for project use
hi! i designed a single board computer for project use. it is designed for simple reliable construction. i think it would be ideal for educational use. there are over a hundred builders of the sbc. there is a backplane the sbc can optionally plu...
Hobby Circuits and Small Projects Problems :: 05 Sep 2009 14:13 :: lynchaj :: Replies: 1 :: Views: 207
1 hz cmos clock design
dear all.after spending painful times to find some info about 1 hz clock, i have finally decided to ask this to you all experts. i am using 0.5um cmos process in cadence. for my chip design in biomedical applications, i need to have a 1hz clock. by t...
Analog IC Design & Layout :: 05 Sep 2009 8:06 :: KS2 :: Replies: 20 :: Views: 1396
starting out- request for verification of goals
ok, im just about to go into my second year in university. in my first year i studied computing science and physics. both courses covered the fundamentals of electronics. the problem with both was that they were all about the theory. so ive decided i...
Electronic Elementary Questions :: 05 Sep 2009 4:17 :: mctylr :: Replies: 3 :: Views: 159
difference b/w wifi and wimax
any information most welcome...
Network :: 04 Sep 2009 20:56 :: tanbukhari :: Replies: 8 :: Views: 1752
ADS
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project ideas for communication project
hello members, i would like to discuss some project ideas for undergraduate in ee with focus on communication...
Digital communication :: 04 Sep 2009 17:07 :: Communications_Engineer :: Replies: 4 :: Views: 450
gsm, edge, wcdma, gprs, hsdpa
what are the main differences betwenn gsm, edge, gprs, wcdma and hsdpa?looks like edge exists in gsm while hsdpa exists with wcdma. what about gprs?...
Digital communication :: 04 Sep 2009 13:44 :: prashant_3g :: Replies: 17 :: Views: 3615
digital voice transmission
hi,i wanna build a walkie-talkie using digtal wireless modules.the module i am using has maximum bit rate of 9600 bps.if i sample the voice at 8000 hz with a resolution of 8 bit then i have to send 64000 bits per second ,which is impossible using my ...
Digital communication :: 03 Sep 2009 21:21 :: elockpicker :: Replies: 4 :: Views: 210
wireless data transmission
dear alli want to transmit some data wireless using transreceiver module tr2.4g and pic microcontroller. can anybody please help me with code or application file.m attaching the datasheet of the module.thanking youwaiting for reply...
Microcontrollers :: 03 Sep 2009 21:18 :: FvM :: Replies: 1 :: Views: 201
why i have a pdp deact ??? sim300c
hi all, i use sim300c to try sending data.but, i dont know how to proiceedmy goal is to find a file containing lines of data on my host or something like that.so can anyone help? i try diffrents at command without success.at+cgatt? +cgatt:...
Digital communication :: 03 Sep 2009 14:50 :: GSM Man :: Replies: 13 :: Views: 1368
handoffs matlab codes for thesis , veerpal newable level 2
hii.. can u also tell some softwares over which these wireless sensor networks (ban in particular) can be simulated? cant i do it in matlab? also please give some simulated code as an example. i am new in this field!thanx in advance....regardssachin...
Digital communication :: 03 Sep 2009 14:41 :: Hectoryx :: Replies: 6 :: Views: 435
need suggestion for choosing ms project
hello i have my bachelor in electronics and wish to do ms in communication.i have interest in digital/satellite communication and computer networking and wish to learn further by choosing project (general). general topic related to above will give me...
Digital communication :: 03 Sep 2009 10:59 :: Communications_Engineer :: Replies: 4 :: Views: 210
why design a model with lower than -10db return loss?
hi all....kinda need an opinion about return loss results.why do we have to design a model which will produce lower than -10db return loss???..any opinions will do..thanks....
RF, Microwave, Antennas and Optics :: 03 Sep 2009 9:15 :: kiwi_fabregas :: Replies: 4 :: Views: 210
looking for basic tutorial on wireless transmission
i have a movement sensor device that currently sends analog data (pressure) which i am recording and thresholding to check for movement.now i want to turn this device into a wireless one and be able to receive data from it through a pc serial port. i...
RF, Microwave, Antennas and Optics :: 01 Sep 2009 22:19 :: supro :: Replies: 0 :: Views: 66
16-qam and qpsk
can anybody explaine the following please:16 qam with code rate of 1/2 coding to give 2 bits per symbol.and qpsk with code rate of 3/4 coding to give 1.5 bit per symbol.also if you know the reference, please advise methanks in advance....
Digital Signal Processing :: 01 Sep 2009 20:21 :: qlands :: Replies: 12 :: Views: 2004
need information about wireless hd
can anybody send to me wireless hd documents,specifications?(other than the wireless hd information provided on www.wireless hd. org)thanks...
Digital communication :: 01 Sep 2009 10:07 :: chetu :: Replies: 0 :: Views: 87
lowest frequency
what is the lowest transmission frequency for wireless communication ?am lowest frequency ? or can we go lower ?...
RF, Microwave, Antennas and Optics :: 31 Aug 2009 3:26 :: E Kafeman :: Replies: 10 :: Views: 444
can pwm module used here control the position in servo motor
im a newbie in learning microcontroller... need a lot of help from u all... i have a pic16f877a... and some rc servo motor.... can pwm module used in here to control the position in servo motor??? or need to use timer0 interrupt?? which method better...
PC Programming and Interfacing :: 31 Aug 2009 2:18 :: issaiass :: Replies: 1 :: Views: 420
cdma with out carrier modulation
generally speaking, the two major points of cdma transceiver are as following,1, pseudo-random code sequences, like m-sequences.2, carrier modulation and demodulation, like psk, qpsk etc.our problem is that we face a baseband transmission system, whi...
Digital communication :: 30 Aug 2009 15:28 :: Hectoryx :: Replies: 4 :: Views: 269
newbee to rf and circuit design - request for correction
hello all,i am new to rf system and circuit design. please let me know which is correct way to go with. currently i am reading the book rf/microwave circuitdesign for wirelessapplicationsbyulrich l. rohdedavid p. newkirkwill it be of any help for me?...
RF, Microwave, Antennas and Optics :: 30 Aug 2009 11:50 :: sibaprasad :: Replies: 3 :: Views: 197
circuits for 3-phase electrical paramters monitoring
hi,i am doing a project measuring voltage, current, frequency, powerfactor and transmitting through wireless. i dont know how to reducte the measure voltage and convert to digital and which microcontroller is suitable for this. kindly help...
Power Electronics :: 29 Aug 2009 10:39 :: FvM :: Replies: 6 :: Views: 471
rf transceiver
hi friends, what is the maximum range of rf transceiver module available in india (bangalre) . im looking for a 1 km range.vc...
Microcontrollers :: 28 Aug 2009 14:01 :: binojkumar :: Replies: 8 :: Views: 535
radio controlled car devolopment....
hi is there any way to build a wireless car back wheel driven with seperate motors for the two back wheels using a 24v battery....pls help im in an urgency to complete this one...thanks......
Electronic Elementary Questions :: 28 Aug 2009 6:43 :: pranam77 :: Replies: 3 :: Views: 177
lightning ethernet protector
maybe i miss the zone but...i have a big problem with my ethernet network, i use outdoor ethernet cable length 100 m, several time (twice in one week) after thunder i have burned equipment. becouse profy lightning protection is over 100 usd, can some...
Network :: 27 Aug 2009 7:50 :: kender :: Replies: 6 :: Views: 843
remote switch with a range of roughly 200 yards
okay, i do not know where this post belongs. i am looking to build or buy a wireless remote on/off switch with a range of roughly 200 yards. i have been able to find no information regarding this and would love to have any input i can get. it does...
General :: 27 Aug 2009 6:42 :: pranam77 :: Replies: 1 :: Views: 190
fm/fsk demodulation using pll
o demodulate a fm carrier? every book i read tells me it can be done but not specific enough on how it is done. i have read horowitz & hill: the art of electronics 2nd edition and rf engineering for wireless networks by daniel m. dobkins....
RF, Microwave, Antennas and Optics :: 27 Aug 2009 3:44 :: disney_snoopy :: Replies: 13 :: Views: 4011
rake receivers in fading channels
hello,in a multipath fading channel, we know that the transmitted signal travels over different paths subjected to different attenuation and delay factors. the receiver combine all these signals together as a superposition. the question is: why the r...
Digital communication :: 26 Aug 2009 8:49 :: saeddawoud :: Replies: 3 :: Views: 167
whats going wrong with the code?
i bought a rf kit, transmitter and receiver, and the website of a similar product is below. now, im trying to write code for it, just to make sure it is working. http://www.sparkfun.com/commerce/product_info.php?products_id=8950im using a pic 16f688 ...
Microcontrollers :: 25 Aug 2009 17:23 :: betwixt :: Replies: 19 :: Views: 767
microstrip patch antenna design
i need to design dual resonance microstrip patch antenna.im new in this field.i dont know which shapes antenna are suitable.before this i try to do stacked antenna.the result also not so good.can anybody give me suggestion which kind of antenna shape...
RF, Microwave, Antennas and Optics :: 25 Aug 2009 7:12 :: ahsaan :: Replies: 20 :: Views: 1618
how to understand rf circuit design principles
dear all, i had to work for some rf circuit, which includes pa, lna, mixer etc i am very new to this field, i started reading book by rf circuit design by ludwig is it essentialy to understand maxwell electomagentic principles, is there any simple wa...
RF, Microwave, Antennas and Optics :: 25 Aug 2009 6:26 :: ragh1981 :: Replies: 4 :: Views: 298
frequency for greater wireless range
hi,why is it that we use lesser rf frequency band to get better wireless transmission range in presence of obstructions ? whats the reason behind it?i was thinking the other way round. if the frequency of the signal is higher, then the signal owing t...
Digital communication :: 25 Aug 2009 6:08 :: Infinytus :: Replies: 2 :: Views: 189
bluetooth interface circuit
hi folksi need to interface bluetooth to a microcontroller circuit..please help me!...
Hobby Circuits and Small Projects Problems :: 24 Aug 2009 16:12 :: requiem_mortis :: Replies: 29 :: Views: 4997
gprs and ppp
i try to connect mcu to gprs with mc35 (siemens gsm terminal).when i try it with my pc and hyper terminal, untill conection is established i use at command, but after conection is establish ppp protocol starting.does someone can help me? does someone...
PC Programming and Interfacing :: 23 Aug 2009 6:19 :: mpch_elec :: Replies: 35 :: Views: 11922
how to send data with gprs - information, schematic
how to send data with gprs......
Microcontrollers :: 22 Aug 2009 9:31 :: mpch_elec :: Replies: 6 :: Views: 417
mutiple 7 segment in long range
hello all,how could i implement mutiple display using pic. the display got 1 master and 5 slave. if we number display in master, the slave should be same number. the problem how to make if the range of between display is long. and i want to minimize ...
Hobby Circuits and Small Projects Problems :: 21 Aug 2009 13:44 :: betwixt :: Replies: 15 :: Views: 528
how to transmit the very high data rate ( > 120mbps)?
could you let me know how to design a system which can transmit the high data rate ( over 120 mbps) with the limitted bandwith (50mhz) and use the low frequency (from 0 to 200mhz)?thank you very much!...
Digital communication :: 21 Aug 2009 11:48 :: cachep :: Replies: 20 :: Views: 1017
simcom sim300 gprs connection problem
hello,this is discussed in other posts too ,but i am still unable to find the problem.i need to send some data to the server using the sim300.i get connect ok where i connect a socket to the server.after this i bring up a prompt using cipsend. so fa...
Digital communication :: 21 Aug 2009 11:14 :: hen :: Replies: 14 :: Views: 1244
rf pa design questions
this is the first time for me to design a rf pa. i did some internal research, and i also read the famous book rf circuit design by chris bowick. ive found the chapter on pa design in this book to be useful. but i have a question after reading this b...
RF, Microwave, Antennas and Optics :: 21 Aug 2009 8:17 :: gremlin :: Replies: 5 :: Views: 630
any book to recommend for mimo information
any kind soul can recommend a good book for mimo information?...
Digital communication :: 21 Aug 2009 1:25 :: insatiable :: Replies: 2 :: Views: 199
wireless network in linux...help help help
hi,how to setup a wireless network in linux to share pcs ?i also want to enable sharing of internet connection over the wireless network in linux, specifically in fedora 10.my objective is, to share the internet connection to other users(pc here) via...
Linux Software :: 19 Aug 2009 10:28 :: Infinytus :: Replies: 0 :: Views: 193
need help urgent- making 2 robots comunicate with each other
there will be two parts to this system: a mouse shaped part, jerry, and a cat shaped part, tom. both will be mounted with sensors and motors. they will communicate with each other, and tom will chase jerry. tom will not be equipped with any sensors o...
General :: 19 Aug 2009 4:32 :: vishnuvardhan :: Replies: 3 :: Views: 188
wireless remote control
i have to bulid a wireless remote control using pic.this remote control transmits signal to be received by light and fan. i was wondering if the radio transmitter - tlp434a from futurlec would be compatible with pic16f628?...
RF, Microwave, Antennas and Optics :: 18 Aug 2009 9:33 :: pranam77 :: Replies: 3 :: Views: 507
what does bearer service means ?
in telecommunications i often come across the term bearer service. what does this actually refers to ?...
Electronic Elementary Questions :: 18 Aug 2009 8:57 :: pranam77 :: Replies: 1 :: Views: 207
path loss models
hiare the path loss models are experimental? or is there a theoretical derivation for them?...
Digital communication :: 18 Aug 2009 7:29 :: sohkha :: Replies: 4 :: Views: 455
wimax implementation (fpga)
hello, i have been digging into this forum, finding *very good books* and other nice stuff. im planning to implement a wimax transmitter and receptor. for now, i should concentrate in transmitter. im going to use vhdl mainly and open cores. so if yo...
Digital communication :: 18 Aug 2009 6:38 :: Muneeb31 :: Replies: 30 :: Views: 5752
metal detector
i am going to start a project of metal detector.i need help for it .can i get any circuit diagram n description of this project that how it works?its really urgent...
Professional Hardware and Electronics Design :: 16 Aug 2009 6:15 :: johan_tr2000 :: Replies: 28 :: Views: 3101
what's on the horizon for prototyping for hobbyists?
so whats next?clock freq. of uc is rising - breadboards as we know it would be a poor choice to prototype on now.communications are going wireless - all that rf again reduces the utility of the breadboard.what is going to replace them?one thing is fo...
Electronic Elementary Questions :: 16 Aug 2009 1:18 :: vsmGuy :: Replies: 0 :: Views: 193
3g!!!
today what would be best??gsm or cdma??...
Digital communication :: 15 Aug 2009 9:11 :: akswami :: Replies: 28 :: Views: 1839
fuel level detector
hi alli need help in designing a wireless fuel level indicator for a storage tank.i have thought in an hermetic device fixed inside the tank, in the bottom with some kind of pressure sensor. so, i can monitor the changes in the fuel weight and sen...
Hobby Circuits and Small Projects Problems :: 14 Aug 2009 11:07 :: pakitos :: Replies: 7 :: Views: 1373
how to design a magnetic near field microstrip antenna
hi. i am currently designing an antenna that needs to have a high magnetic field strength. is there any specific features or golden rule that i need to follow on to get something out? thanks in advance....
RF, Microwave, Antennas and Optics :: 13 Aug 2009 13:25 :: ntstatic :: Replies: 5 :: Views: 565
opportunity in algorithms' coding
i am seeking fresh engineering grads to work on algorithms development for wireless networks.the candidate would be required to translate algorithms into c/c++ code. the target is to test the performance of the different algorithms using an efficient...
Software Problems, Hints and Reviews :: 13 Aug 2009 10:11 :: HanyKM :: Replies: 0 :: Views: 178
modding an earbud from wirless to wired
hi there, i am wanting to convert a wireless (bluetooth or audio-frequency induction loop) earbud to be wired. i am wondering first is this possible? and second if so then how would i go about this? is it as simple as taking the small antenna out and...
Hobby Circuits and Small Projects Problems :: 10 Aug 2009 22:55 :: pahoogawoo :: Replies: 0 :: Views: 201
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