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i am not getting the calling of function in the program of ook modulation.plz haelp me out
ook modulation & demodulation in analog ASIC design ? how i can reach to transistor circuit act as a mod & Dem to use it in analog ASIC design *layout* i got one in mod but in dem hardly any buddy can help me:-);-):|
hi.. i am doing a project on designing a transceiver in ansoft designer in ook modulation for 2.4Ghz i have done simulation of simple transceiver (transmitter and receiver separately), but I'm not able to do it in ook modulations... can anyone plz help me in designing transceiver in ansoft desingner or any similar file (...)
I like to test out a concept on simulation (Pspice) and need advice from the gurus. Overview: - Tx/Rx optical communication system - ook modulation is used Receiver: Incoming Signal -> Amplifier -> BPFilter -> Demodulator I have the following questions: - BPFilter introduces significant group delay (Assuming 4 pole, active filter), do
Hello everyone, please help urgently... I want a matlab code for Eb/No versus R/W for ook modulation that shows that shows that the ISD of ook is 1 bit/sec/Hz Your help will be highly appreciated :)
Please please help me in this: I need a matlab code showing Rb/BW (i.e. bit rate/bandwidth) versus SNR for ook modulation... Thanks and awaiting your responses! :)
hello everyone! I'm try to simulate ook modulation. EX I have seri bits :. i don't know how to modulate it by ook. you can tell me, how to do it and what shape signal. thank you Hi Bangbi, What You mean with "I'm try to simulate ook modulation." ? What you use, what simulator? What compi
Thanks for sending the reply. Can I use ook modulation for data and combine with DC on single line.Iam looking for a cost effective solution. Thanks
You can use u'C i/o transmit & receive bit-shift-data by ook modulation. Because SM6136 is a encode(or deode) ook modulation data by pulse length & pulse count.
For everyone's education and amusement, in years gone by when atomic bombs falling were a reasonable assumption, many nation's military had HF and lower frequency antennas buried underground so that they would not be damaged by the blast. They found that there were two ray paths. One through the earth and one up bounced against the ionosphere. T
what is the data rate generally taken for the beacon transmission in morse code (ook modulation) so the signal can be perceived by the ham users
Hi, I am adding strong noise which has zero mean to an ook modulation. I use for that the matlab function 'randn'. But after this, I apply a chebyshev 3? order bandpass filter and I don't really know if the output signal would have the same property of zero mean or not? Thanks in advance
To show you how your module work, you should give some info about them. From what you're saying it seems that these modules use ook modulation. The transmitter need an accurate frequency set, it can be through a SAW filter if you haven't seen any XTAL on board. My guess is that you are right: you can see the TX as a simple data modulator to 315 M
Hi all I'm student and working with a small project which involves wireless transmission. I'm using the Parallax 433MHz Transceiver (ook modulation, 2500 feet sight line) and have a problem during the transmission. I'm using the UART from PIC16F876A with a baud rate of 2400 b.Initially the MCU is only in TX mode, while my PC is in RX mode (us
Industrial environments are hot and noisy. So first you would pick a transceiver that can handle extended temperature ranges. A lot of electronic noise will be contained in the 30 MHz (an its harmonics) and lower frequency range, so a communications link at 915 or 2450 MHz will, in general, do better. A spread spectrum system, especially one
for the training mode, my model works well. When transfer to the Direct Decision Mode, I am confused about how to realize the Decision Device , specifically , I do not know how to choose the right reference value for decision. The mean of the equalized signal? I have tried but not work well.101283 Channel is based on the sin
Cheers speedEC 433 MHz RF transceiver works on UHF at 25mW and an ook modulation should do the transmission part ? I have no idea about gyroscope, any information on how to implement them?
Ηi i am doing a project for free space optical communications. So i read that the most famous modulation is ook and PPM. So, about ook i understand it. For PPM it is a pulse modulation. The pulses propagate through the space ?????? without any optic carrier? thanks a lot
u can use any mod technic for digital data, ask ook fsk with data rate about 9600 baud, just select the trx and replace its data with yours. be carefull about the noise from trx
Hello, Many low cost ism transceiver support ook , ASK and FSK. can we make MSK modulation with these chips even if it'n not clearly specified in the data sheet. I saw in some book that MSK is a special cas of FSK with DF=datarate/2. Is a modem that support GFSK can modulate and demodulate in GMSK ? Sincerely
Hi, While working on the real UWB system, I used both PPM and ook modulated transmit signals. In either case, the same pulse shape and therefore the same pulse energy is used. For PPM the average energy is taken as Eb and for ook as Eb/2. Further, two different receiver positions were chosen for simulation environment. The two positions are sep
helo.. can anyone help me.. how to do simulink for ook,8psk,bpsk..pleazzzz help me....:cry:
we have an assignment to look for different ASK circuits. And then we'll try it in Multi-sim (workbench) so that we could see the output.. please help. thanks =D
Hi--I am looking for implementing L-PPM and it variants like Sub Carrier PPM in Simulink. These are used in Wireless Optical Communication. I am not very conversant with Simulink. Can any one help me with the model (block level) implementation of the same? Thank u in advance.
i am having rf+dc+ook combined signal. i want to separate these signals. what what method i should implement so that i can separate these signalsI can't understand what you want to do ? What do you mean by "separate these signals" ?
hello , how are u all i need help to find matlab code for FSK modulation & PSK & ook &PRK and also bit error curve of all modulation above VS SNR thanks in advance
I studied that the data can be given to the LASER and the LASER can transmit light for binary 1 and no light for binary 0. You are right but it is only one of modulation schemas. It is called ook (on-off keying). It is true that it is popular type of modulation in optical communication however there are some othe
Low cost radio transmitters are in fact using a kind of AM: Simple ASK or ook (on-off keying). It can be easily implemented at any frequency, but it's very unusual at 2.4 GHz, I think. You also have complex modulation techniques like QAM, but as you apparently targetting to simple methods, they most likely aren't an option. So FSK variants are the
hey all, Im still new to ADS agilent and I need to generate an ook modulated signal with a data rate of 10kbps and an rf carrier of 2GHz. Can anyone help? Thanks alot
To avoid re-inventig the wheel (or at worst case the square wheel), why don' you use available cheap ASK (ook) RF modules? 433 MHz can be used license free in many countries. If the solution is too simple, you can still build your own transmitter and receiver with available RF ICs. At least you'll learn much about suitable RF transmission techni
Yes,i know what you said which is stand ASK or ook principle. I asked is about PR-ASK, Phase Reversed-ASK. thanks.
Hi, Is there any difference between ook and ASK? Thank you.
Hi all of you electronics fans, I was searching the internet for a good ebook covering different analog modulation techniques (AM, DSB, SSV, FM, ...) and others. I just couldn't find one. So I'm asking you. Does any of you have a good ebook to share. Many thanks !!!
What is modulation loss?
through bulding antenna... an array antenna to get a scaning beam probagation I need to change phase shift of transmetted signal to let the beam scan the area needed.. how can I do that... I need onlythe idea of how to design my transmitter. a block diagram or what ever... thanks ya! the problem is that i couldn't get a useful diagram or desi
There is an old technique called DC-restoration that compensates (at the receiver side) for the loss of low-frequency contents in NRZ when the signal passes by a channel with a zero at 0 frequency. It is mentionned in the classical book by Lucky, Salz and Weldon (Principles of Data Communications). The idea is a very simple type of fixed decision-
if u don't mind about the data rate, ask ook is simple to build
Hi all, I just wonder what kind of modulation they used for wireless internet communication at 2.4Ghz or 5GHz. Any one have a good e-book or link for this topics? Pls share. Thx in advance Tr2000
hi all is anybody having information about how to do frequency modulation using nco and dsp. thanks in advance
I had a look at the datasheet on line and it seems that no special modulation feature is included in the instrument. So be aware of the max freq, amplitude and shape of the signal you apply to modulation input, otherwise you'll get a wrong spectrum. Mazz
It looks like the extra k factor on the end with the phase modulation keeps it from being 4fsk. You could keep i constant and just vary k to make it qpsk.
When testing the GSM phone , it shows fail at the 400K point for spectrum modulation of GSM band. Could you please tell me how to resolve it from sw or circuit?
You can take a look at xapp155 and xapp154. Xilinx also provide source code for their sigma-delta dac. regards
You will need a local phase reference to do the angels. QAM is expensive enough to do that you should not economize on the detector method. Using the I and Q coherent detectors and level slicers should be done. If you are making a low cost system, ook or FSK would be cheaper.
You could place request of the book in Elektroda's E-book request forum. Link to the forum: :)
in amplitude modulation your modulated signal is : xc(t) = x(t)*A*cos(wt) but dsb-sc is : xc(t) = (1+k*x(t))*A*cos(wt) for details go to haykins communication book..!
Hi all!!!! I need to construct an ultra low cost (less than US$2.50) transmitter. 0dB output power, ook modulated, stable (maybe SAW stabilized), 433 or 432 MHZ, 2.5 to 3.3V power supply. Need only the Tx circuit (the modulation signal comes ready from another circuit). Low power consumption is a need. Could anyone help me with circuits (practic
Hai Guys: I would appreciate if anyone of you could explain the OFDM modulation scheme in a nutshell. Below are some questions in parallel to this inquiry: 1. What type of carrier signal used in this modulation scheme?. 2. What is the time domain equivalent signal used as the baseband signal?. 3. What type of transmitter preferred in compli
what is cck modulation? is it belong to spread spectrum modulation? how is its processing gain. if input data rate is 2Mbps, after cck modulation, how the chip rate is? 2M chips/s ? or others?
FM and PM are all the angle modulation in digital modulation,the relation is you can use the PHASE modulator to realize the FM modulation if you use an integrator to integrate the incoming source information,from the point of digital modulation,the phase modulation is the best,not the FM,for example,bpsk is (...)