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This is a fundamental problem with non-linear elements in a feedback path. You will not be able to vectorize. You might try an old trick though. Instead of having to make a sample by sample decision you could make small block decisions. This has been used in practice for exactly your...

SomeptingGuy, sum times you find out somehing interesting. Thanks, I write an informal MATLAB user group newletter aperiodically. I a always looking for something interesting and of general interest. I appreciate it! John Solar

Correct. Mostly. The frequencies are true, since the transform shows or lists all of the frequencies possible. The amplitudes are incorrect, but the best based on the assumptions about what happens outside of the time sample we used. This happens even when there is no modulation, so modulation...

All, Nice work and well written. Thanks for kicking it off jraef

You have wire OR'ed an RF connection. At your frequencies you need to have impedence control and matching. The vendor does not specify the output Z when not powered, so you do not have the information to make a decision. Past work has shown that non powered ckt.'s can still look like diods...

The numeric values of the Fourier transform are identintical. It is just that the numbers on your frequency axis are now cut in half. Whereas originally you might have plotted them from zero to 0.5 Hz, you would now plot from zero to 0.25 Hz.

try log( abs( stuff ) ) or find all of the non positive elements of stuff using find() and setting them to eps.

Your last and final touching of modulation should be your physical layer encryption. Do this with a spreading code, preferably a CDMA type phase modulation (see the 3G recommendations, they are very good ideas). At 0.1 Gbps raw data rate, assuming 4X spreading and final 20 dB spread you will...

The NN toolbox is available

VE1BLL is correct. There is no such thing as two antenna's close together. You can not cheat physics. You will have coupling, intended or otherwise. Why do you have 2 apertures close? What effect are you intending to acheive?

rifter1 "Ohms law stating that current is directly proportional to voltage" is true only for a resistive load. As soon as there is any reactance there is a phase angle between voltage and current. There is a diffeence between VA and VAR.

If you can afford an elaborate "finding" device, like at a disc golf club, you might try a diode. By selecting the lead length on a high frequency diode you can make a zero power transponder. With a lot of power and some directivity on a powered "finder" you would transmit an RF signal n a GHS...

Whatever it is you are heating, you will need to know its specific heat (you have already given the volume as 2mm, so is that a 8 cubic mm?). Then you will need to explain to us the method of conduction and efficiency into this material. With unfounded assumptions on the specific heat and on...

Higgler is correct. To elaborate more, you are asking for a comparison between apples and oranges, or more precisely between power density and power. The field strength meter will tell you how many volts per meter the filed pressure is. With an assumed far field free space estimate of 120 *...

johnwiss, Good work. The recycled preamble sound like the key to your innovation. Averaging (of any sort, Kalman or otherwise) does not really help when you are below threshold (the point where the output SNR drops drastically with dropping input SNR). The cycle slips averaged give bad data...

See the adverts in Circuit Cellar Inc. and in Embedded System Design. If you are willing to do the systems engineering and the integration task, you will find that you can assemble your own custom system for little money. It will take some research and design. I hope you will use the car...

Noway2, you are correct. A real signal is lets say cos(wt). An analytic form of a positive frequency only is exp(jwt). From an Euler identity we have exp(jwt) = (cos(wt)+j*sin(wt)). So a real signal has both positive and negative frequency, as seen from the inverse identity cos(wt) =...

WiFi is no where near enough bandwidth. I mentioned previously that 8 bits was enough. I gave you a web site reference previously that gives you which 5 pins are for the 3 color and 2 sync lines, which are grounds, and which are inputs to the PC and which are open. I gave you a web site link...

If you want to pay the paten royalty you can use an RF monolithic design. However, you might be able to use thier ideas if you use one of thier amps for your RF gain block. Do you need to pull this one? John Solar

Much clearer. Still, this is very ambitious for a digital person. Of the 15 pins, only 5 of them do anything useful for your transmitter. So, you only have to transmit 5 signal. Those are your 3 colors, and horizontal and vertical sync. The color is impedance controlled and in the MHz...