Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
We know the G726 support 2/3/4/5 bits quantization, who know how to make a 6/7 bit quantization to get better quality? Who has the quantization table for 6/7 bit?
Most WIFI IC claims they supporting all 802.11 standard, but the "all" means only 802.11a/b/g, not original 802.11, is my understanding correct?
Is there any WIFI IC/product in the market still supporting original 802.11 FHSS 1Mbps mode?
definition of channel estimation
The channel effects like a filter. Channel estimation is to estimate the filter coefficient through received signal and other known information (such as modulation type)
frequency offset estimation matlab
I can't understand your code, and maybe I am wrong but it is probably the code is completely wrong.
At least there should be a modulation signal such as random bit sequence. And then the bit sequence is modulated with QPSK format on a carrier. Then the...
If you know the modulation signal is X Khz sine wave, and deviation is also known Y KHz, then you know the signal frequency (such X, X+Y, X+2Y) at FM signal according to FM modulation principle (many book have it), other frequencies are noise.
only I/Q can give you phase information, if you want to demodulator signal from phase information, then you need I/Q, else only I or Q is needed such as FSK demodulator with PLL.
Just add a white noise in signal phase, for example, the idle signal edge at time [1 4 8 12] that signal is [0 0 0 1 1 1 1 0 0 0 0 1 1 1 1], you can add a white noise at the edge that the result signal is [0 0 0 0 1 1 1 0 0 0 1 1 1 1 1], and you can derive the relation between white noise...
I know the ADC dynamic range in RF system is limited by block signal at adjacent channel. You can refer to RF system design book (search in this forum) to get more information
site:www.edaboard.com spec of bluetooth
Bluetooth defines the GFSK with BT=0.5, so I design a Gauss filter with:
Matlab: h = gaussfir(0.5, 1, 8)
And Bluetooth also defines that deviation of pattern 0101 must be not less than 80% of deviation of 00001111, so I simulate it with:
Matlab: sym0 =...
data slicer
We using FM PLL demodulator with a data slicer as FSK demodulator, my question is what is it a coherent demodulator or non-coherent demodulator?
And FSK demodulator has two another method:
1: general band pass filter and envelope comparator
2: match filter BPF and envelope...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
