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14 Threads found on Crest Factor
I don't think a low crest factor RMS converter will be a significant source of error in you noise measurement so I would use the highest you can find and go from there.
What crest factor are hoping to achieve ? This is peak/avg ratio? What efficiency? What kind of transformer 50/60Hz? Lam. Core? This is important in determining how and what commutation rate it can support. Without this info, design is impossible.
Hi to All, I have 2 questions about PAR. 1) Is it right to say that the constant envelope modulations such as FSK or GMSK PAR value is equal to 0dB? 2) crest factor for a sin wave is 3.01 crest factor for a FM modulated signal is 0dB.
crest factor for FM signal??? Hi All, crest factor for a sin wave is 3.01 dB. Why crest factor for a FM modulated signal is 0dB. the FM signal basically is a sinusoidal carrier. Is it right to say that the constant envelope modulations such as FSK or GMSK (...)
Hi to all, I'm trying to built simple power amplifier with cmos output. I need to calculate output power in tran analysis, usually I do it with dft function and rms value for signal. For example for sinus we know: P=\frac{V^2 }{2R } Also, from wiki crest factor for rectangular
Hi, crest factor = Peak Current / RMS Current. In a linear load, the crest factor is 1.414. However, in a general purpose SMPS, due to its non linear nature, this factor will be much higher - in the region of up to 4. See if you can measure the current using a CRO/DSO by putting a small resistor but having (...)
rms() function gives Vpeak/CF, where CF means "crest factor". If signals are pure one-tone sinusoidal, CF is sqrt(2). See Note : rms() is for results of transient analysis. If your signals are results of ac analysis, you can't use rms(). In this case, use Vout/sqrt(2) simply without invoking rms(Vou
@ Mityan: GSM uses GMSK modulation and GMSK modulated carrier having a crest factor of 0dB. If multiple carrier are using then crest factor will change as per the formula given in above thread by vfone. my main query is how it is changing the crest factor for multiple carrier (GMSK (...)
Here is a better explanation of the PAR (crest factor): As you see, almost every signal have some kind of peak to average. For a multi-carrier signal (as OFDM) generally the peak-to-average can be calculated with: PAR = 10*LOG(Number-of-Carriers) For example the PAR of a 12 carriers signal would
Greetings All- I am trying to bring myself up to speed with things like EVM, crest factor, etc. I get the whole peak to average which dictates how much back off one might use. I don?t yet have a feel for what is good and what is poor in terms of quantifying how much I can get away with. Currently I am dealing with a QPSK system that has a bid
It depends from the signal you have to amplify. I mean: is it a CW or it's a signal requiring the amplifier to have back-off enough to manage the crest factor (f.i: high order modulation schemes, CDMA, OFDM) ? Furthermore what about gain ?
Hi, does anyone know the crest factor for Galileo BOC(1,1) and GPS BPSK? Regards, Anna From one point of view both modulations have constant amplitude envelope. On the other hand the signals are somehow noisy, and a crest factor of gaussian noise is around 12dB. Anyone has any ideas?
The level of Back off depends on the crest factor of the modulated signal. Eg: pi/4Dqpsk modulation has a crest factor of 3.3dB (crest factor means peak to average value of the modulated signal envelope). CDMA signal has a crest factor of about 10dB. So (...)
Anybody knows the crest factor of DVBT?