80 Threads found on edaboard.com: Fsk And Psk
I am newbie in RF field, I just wanna to know how much fast the data rate ASK and fsk and psk modulation can go? another question is why there are no RF module in the industry using psk modulation in their chipset at 315MHz and 433 Mhz?? Thanks!!
RF, Microwave, Antennas and Optics :: 14.04.2003 21:18 :: skynet :: Replies: 2 :: Views: 2766
what are the advantage of ASK over psk and psk?
Electronic Elementary Questions :: 08.03.2012 11:22 :: firas90 :: Replies: 2 :: Views: 1820
i using vhdl simulation software MODELSIM SE, i planned to write a code for fsk,psk modulation and demodulation, can anyone help me on this, and also i need use work.sine_package.all library to be included in that, where i can find that??
Electronic Elementary Questions :: 28.01.2006 05:28 :: brahma :: Replies: 0 :: Views: 1226
i am new to vhdl. Is it possible to design fsk, psk modultion and demodulation in MODELSIM( bcoz thats what i have), i dont know how to bring sine wave in that..can anyone help me. otherwise anyother simulation tool is available for this???
PLD, SPLD, GAL, CPLD, FPGA Design :: 28.01.2006 05:34 :: brahma :: Replies: 6 :: Views: 2106
Modulation is when you have a low frequency signal and you want to transit it for exemple, it's useful to grow up its frequency, so you use a modulation method (AM FM PM in analogical modulations ASK fsk and psk for digital ones).
AM or ASK is an amplitude modulation: it's about variying the amplitude of a high (...)
Digital communication :: 08.11.2006 15:07 :: jakjoud :: Replies: 9 :: Views: 6731
I have been investigating on the applicability of power line communications techniques. I want to simulate the plc system in MATLAB (m file).The simulation includes fsk and psk and OFDM modulation and demodulation , error control coding , powerline channel and the noise over (...)
Microcontrollers :: 01.05.2009 04:37 :: Mai Ahmed Samy :: Replies: 0 :: Views: 881
The psk will have 3 dB better performance at the cost of more complex receivers. The reason for the 3 dB is that fsk is orthogonal and psk is antipodal. This may not mean much to you but the distance between the two signal points is 1.414 times larger for psk.
RF, Microwave, Antennas and Optics :: 30.11.2004 14:49 :: flatulent :: Replies: 3 :: Views: 1386
Please, can anyone tell me how to plot the signal constellation of ASK, fsk and psk
in the presence of noise using Matlab codes.
Thank you very much indeed
Digital Signal Processing :: 20.12.2005 07:57 :: Na3noOo3 :: Replies: 3 :: Views: 3715
i want the differences between ASK and AM ,fsk and FM ,psk and PM'' be precise i want to know Analog modulation versus Digital modulation(ASK vs AM,fsk vs FM, psk vs PM). which one is terms of bandwidth,SNR or
P(e), modulating and (...)
Electronic Elementary Questions :: 15.02.2006 05:48 :: electronics_kumar :: Replies: 8 :: Views: 21945
For radio sistems narrow band (12,5 or 25 Khz)
-ASK. Simple and cheap (ususally AM systems)
-Ffsk. Reliable and very good BER.
-psk has a higher speed but perhaps is more dificult adjustment if you are using links betwen your diferent stations.
I hope this helps a bit.
Electronic Elementary Questions :: 05.03.2006 17:31 :: Pont de Pedra :: Replies: 8 :: Views: 16043
Do you have any idea about this title?
An FM Modulator/Demodulator using fpga
The modulation may be fsk or Xpsk!
PLD, SPLD, GAL, CPLD, FPGA Design :: 05.03.2007 16:14 :: eelinker :: Replies: 4 :: Views: 5961
ya the demodulator should be aware of the input time slot... but in the case of fsk if a PLL is used for demodulating then it is not necessary that it should be aware of the input time slot unless the other frequency used is not in the PLLs capture range........
Can u specify what u r using for demodulating the fsk signal.........
Digital communication :: 21.06.2007 01:56 :: A.Anand Srinivasan :: Replies: 8 :: Views: 1717
Please inform about good e-books and sites that have modulator and demodulator design and tutorial (for fsk and psk)
Electronic Elementary Questions :: 15.09.2008 03:33 :: adeel.sid :: Replies: 1 :: Views: 649
first Same MEAN POWER (1/2 of ones's and 1/2 of zeros'), Amplitude equal for all waveforms (ASK, fsk, psk, etc)
then compare things:
ASK detector have one branch. Noise in only one branch. Mean Power
fsk detector have two branches. Noise in two branches. 2xMean Power
psk detector only one branch. (...)
RF, Microwave, Antennas and Optics :: 19.10.2008 14:42 :: teteamigo :: Replies: 2 :: Views: 2764
i need matlab programs of ask,bpsk,fsk,dpsk,qpsk etc. of digital communications.
Digital communication :: 08.11.2008 09:13 :: ermonagarg24 :: Replies: 13 :: Views: 6407
I have attached the frequency spectra of fsk and psk.can some one please explain why these figures look different, why is it that the peaks are formed only for fsk modulated signal and not for psk signal.
Digital Signal Processing :: 06.05.2011 15:51 :: jess17 :: Replies: 0 :: Views: 309
The OP didn't yet ask for the code...
For many applications, a NCO (numerical controlled oscillator) vendor IP will offer all what you want. If you think of modulating an existing carrier, you should consider that both fsk and psk involve a signal manipulation in time domain.
PLD, SPLD, GAL, CPLD, FPGA Design :: 13.01.2012 04:14 :: FvM :: Replies: 3 :: Views: 748
I would like to design a wired communication system between 2 buildings say 150 meters apart.
My idea is to design a transciever which can be used on both ends of the wire channel
Transciever will employ either fsk or psk for data transmission/reception
I would like to know how to estimate minimum signal power required to transmit data
Analog Circuit Design :: 28.01.2012 16:23 :: edinburghtech :: Replies: 3 :: Views: 507
I need to transfer some digital data (like data received by a typical GPS module) to some point say 10Km far from it. Do anybody have useful info or advice? I guess that using digital modulation is recommended, but which one? psk, fsk, Qpsk, or ?
I need it for MS project. Thanks! 8)
RF, Microwave, Antennas and Optics :: 09.05.2004 02:56 :: Manoochehr :: Replies: 6 :: Views: 1195
You will have to put a psk detector at the end of the IF chain in place of the AM detector. It might be easier to use fsk and have a PLL as the fsk detector. If you do need the psk, look up "costas loop' on the web or in a communication theory textbook for circuits.
You could even use on-off keying (...)
Analog IC Design and Layout :: 02.02.2005 00:53 :: flatulent :: Replies: 3 :: Views: 3101
Electronic Elementary Questions :: 12.11.2005 11:35 :: Unomano :: Replies: 7 :: Views: 5656
Can anyone please help me where I can get circuits of ASK and fsk (modulator and demodulator)?:idea:
Digital communication :: 09.12.2005 08:20 :: Weis Guy :: Replies: 5 :: Views: 4827
is there any component in orcad make modulation like ( fsk , psk , ASK .......)
Analog Circuit Design :: 07.03.2006 15:36 :: agana56 :: Replies: 1 :: Views: 1052
Binary ASK (on/off Shift keying) is the least one that occupy spectrum because you transmitt carrier in case '1' and nothing is transmitted in case '0'
in Bfsk you tranmitt carrier f1 in case '1' and carrier f2 in case '0' , so spectrum is larger as you have now 2 freq. components , Same case for Bpsk except for (...)
Digital communication :: 27.05.2006 04:02 :: Abu Ammora :: Replies: 2 :: Views: 2264
As I understood your problem. You are saying that in texts authors always mention rectanglar pulse for analysis but in real world we would never use rectangular pulses.
You are right after modulation we have pulse shaping block which shapes the pulse to make it compliant to spectrum. This pulse shaping block might be missing in modulation
Digital communication :: 13.10.2006 03:17 :: nitu :: Replies: 5 :: Views: 2325
i have to a project to tranfer data between PCs using sound card. Require data is modulate fsk or psk or HDB3 ... to packet. This is my exercise for data communication and transmission.
Please help me ? using PIC or PC, soft by delphi
Have you some idea?
PC Programming and Interfacing :: 01.11.2006 09:42 :: hivongxanh_dt7 :: Replies: 1 :: Views: 972
I am doing a DSP project on implementing modulation schemes such as psk, fsk, GMSK, Qpsk. If anyone has already worked on those and have their MATLAB or simulink code, i would be very grateful if you can mail me. I have implemented Qpsk but would appreciate if anyone could provide some or all of those. (...)
Digital Signal Processing :: 11.01.2007 11:20 :: abdullahkhan5 :: Replies: 0 :: Views: 2885
The Iterative Solutions Coded Modulation Library (ISCML) is an open source toolbox for simulating capacity approaching codes in matlab.
It has been developed by Matthew Valenti.
It is licensed as free software under the lesser GPL license.
The toolbox contains support for the followi
Software Links :: 18.02.2007 09:15 :: AARTHIREDDY :: Replies: 2 :: Views: 5289
which is better: psk or fsk
Specifically, Bpsk and BFK. what if we increase the constellation?
Digital communication :: 05.03.2007 16:45 :: gks83 :: Replies: 17 :: Views: 9498
1. Why FM is better than PM for analog communication?
Which is better depends on the characteristics of the signal to be transmitted.
For FM transmission of speech, it is usual to use preemphasis before FM modulation and deemphasis after FM demodulation. This is equivalent to use PM (if the cutoff frequency
Digital communication :: 20.06.2007 08:25 :: zorro :: Replies: 6 :: Views: 4273
we know that the several terms in communication, like (pcm,ppm,pwm),(ask,psk,fsk.......),and(GSM.TDMA,FDMA,CDMA......),whate the different between this.that ican use several terms in on system
Digital communication :: 13.11.2007 11:17 :: haif :: Replies: 3 :: Views: 684
Each parameter is defined separately,but all are related in one form or another.It's like this: S/N is defined as The ratio of Average Signal Power to Noise Power.Generally S/N is measured at the output of the receiver and as per ITU regulations, the S/N that should be acheived at the output of the telephone channel is 50dB.
Digital communication :: 05.09.2008 09:57 :: Bhanumurthy :: Replies: 5 :: Views: 1451
I m saying that i have a 4bit parallel data ehich is coming from parallel port,i want to transmitt it.what i do??the range is 100 meters.
technique means either fsk,psk or ask???
Added after 2 minutes:
and also frequency at which we have to transmit?
Hobby Circuits and Small Projects Problems :: 01.03.2009 05:09 :: irfi :: Replies: 5 :: Views: 2623
hi, friends I am new in this forum, but I have my project of simulating an interctive ASK,psk and fsk comunication system using simulink.
but i have do not understand how I can iteract these three communication systems such that user can interactively choose one of the sheme and see the waveforms at each (...)
Digital communication :: 28.03.2010 04:34 :: mmallaba :: Replies: 0 :: Views: 1138
As you are mentioning class E also, I suppose you dealing with RF power amplifiers.
Class E amplifiers can only be used for modulation schemes that have constant envelope (FM, constant envelope psk/fsk, etc).
Filtering out the harmonics is good to remove the harmonics, but does not remove unwanted sidebands due to (...)
RF, Microwave, Antennas and Optics :: 02.05.2010 10:34 :: WimRFP :: Replies: 4 :: Views: 873
I have a essential need to a general information about the design of receiver and transmitter of a satellite communication system involving general block diagram of components and brief explanation about each of them.Modulation types are psk and fsk.
Anybody can help me?
Please help me?
Digital Signal Processing :: 10.07.2010 15:12 :: vahid28 :: Replies: 0 :: Views: 1473
I need your help.
I currently work in the detection of signals with digital modulation, especially psk and fsk signals.
I found the most convenient method for the classification between these two signals is the wavelet transform. I tried to apply it but the problem that the histogram is not what I am looking for.
Can you (...)
Digital communication :: 15.07.2010 15:26 :: Franchiska :: Replies: 1 :: Views: 671
I have been reading on fsk , psk and ASK and have been asked to produce a graph ( attached ) by writing few lines of Matlab code.. :|
Could any one possibly tell me how to get started on this please?
Digital communication :: 01.11.2010 05:17 :: Girly_girl :: Replies: 10 :: Views: 3585
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
Digital communication :: 26.12.2010 11:06 :: eng_M :: Replies: 0 :: Views: 816
using pll as fsk modulator is easy to understand.how to use a PLL as psk modulator? Anyone have suggestion?
I have read some article about using PLL as GMSK modulator by dlta-sigma modulator. changing the divider N could chang the frequency,but how could the N divider affect phase of VCO output?
RF, Microwave, Antennas and Optics :: 22.02.2011 01:34 :: fenfei :: Replies: 3 :: Views: 1078
i have seen alot of ofdm modem based on psk modulation.. but havent seen any fsk or ask.. is there any reason or advantage that psk has over the other 2.
Digital communication :: 05.05.2011 09:04 :: Girly_girl :: Replies: 3 :: Views: 793
I have recently created a fsk transceiver in hardware using a 555 timer circuit as the modulator and a XR2211 as the demodulator and I am now looking to implement the system using a dsPIC or similar low cost chip. I however do not have much DSP experience.
My problem is that I am currently working with low frequency carriers(space - (...)
Digital Signal Processing :: 31.08.2011 13:36 :: guitargore :: Replies: 1 :: Views: 983
why phase shift keying (psk) is often used for DS-SS whereas frequency shift keying (fsk) is used for FH-SS?:!:
RF, Microwave, Antennas and Optics :: 04.09.2011 22:27 :: naspek :: Replies: 1 :: Views: 1139
digital to analog convertion;
ASK, fsk , psk, QAM,Qpsk?...
Perhaps you should spend a bit more time to formulate a question. Otherwise there is not much motivation to reply to your posting.
Electronic Elementary Questions :: 26.10.2011 03:26 :: LvW :: Replies: 4 :: Views: 1473
What is the difference between PCM and other modulation techniques like psk, fsk etc... I understand how they are done, but my question is where do they fit in communication system. lets say we have binary sequence we can use PCM and transmit it..then why do we need other keying techniques. do we something (...)
Digital communication :: 07.11.2011 10:59 :: varindernew :: Replies: 1 :: Views: 1015
Info on important characteristics of different psk and fsk modulation schemes - need examples. Thanks
Digital communication :: 14.06.2012 02:13 :: begi :: Replies: 0 :: Views: 548
What does the noise in fsk constellation indicate? I mean you can see those clusters near the amplitude. Do they indicate a change in the frequency ??
Note that Φ1 and Φ2 are the
Digital communication :: 19.03.2013 03:54 :: SherlockBenedict :: Replies: 3 :: Views: 261
These are types of distortion added to signals by amplifiers and other circuits. The first term in the x/y format is the property of a perfect signal. The second term is the type of imperfection added by the circuit.
As far as envelopes, different modulation types only change the phase or frequency of a signal. MSK and fsk are (...)
RF, Microwave, Antennas and Optics :: 03.12.2003 10:06 :: flatulent :: Replies: 11 :: Views: 2847
Assalam O Alekum
Digital Data Encoding Techniques can be divided into following
1. Digital Data Analog Signals
2. Digital Data Digital Signals
NRZ, Manchester etc.
You can have a complete knowledge of all encoding techniques in
DATA and COMPUTER COMMUNICATIONS
by WILLIAM STALLINGS
Check the attachment (...)
Digital Signal Processing :: 07.11.2004 05:43 :: Hamidzia :: Replies: 7 :: Views: 1373
1. What is BigZee? (A paper states that, it?s a new standard for Wireless PAN)
2. What is PAN (as indicated in question 2)
3. Can you tell me some basic information about Gfsk ? Gaussian Frequency-Shift Keying
4. Need some more clear explanation:
Sentence: ?UWB transmissions can operate in 3.1 ? 10.6 GHz with a limited transmit power of -41dBm/
Electronic Elementary Questions :: 27.01.2005 19:39 :: semiconductor :: Replies: 2 :: Views: 1096