No offense to the brilliant engineers out there, but after going through many migrations in my career, I believe that brilliant engineers are the last people you want anywhere close to the project.
Also, you should budget 25-50% of your project time and effort on getting the legacy system "ready" for a migration.
The RTL-SDR is only an RF front-end that brings down the desired RF signal to a baseband frequency, followed by an quadrature AD converter, followed by a USB interface.
All the DSP operations are already done by the Raspberry Pi.
In the diagram above, it shows “DSP” but that’s just two basic multiplications and a low pass filter. It doesn’t do any heavy lifting.
If you want to get rid of the RTL-SDR, you’d need that analog RF block and the AD converter inside the Pi. That doesn’t make a lot of sense of a general purpose SOC.
The challenge is that the raspberry pi doesn't have an analog to digital converter with enough bandwidth to sample the ADS-B data, or any way to downconvert the signal from 1090MHz to see it to begin with, so you are going to need hardware.
ADSB uses pulse amplitude modulation, so if you built or bought a downconverter and amplifier, you might be able to pick up the modulation by sending the downconverted/amplified signal to a GPIO pin and reading its state at say 5-10 MHz.
It'd be pretty messy and you'd have to write the demodulator from scratch, but might be able to pickup the frame decoding from one of the other products out there to actually read the content.
Would be a really fun project but not likely to save money and definitely not time.
Is there any reason to believe that cheating is something that started recently?
Is there any reason to believe that the ROM loaded on every single original Donkey Kong cabinet is exactly the same?
Is there any reason to believe that the components on every single original Donkey Kong cabinet perform the same?
If you look at the sports world you have, more or less, the acceptance that cheating happens, the components change, training regimens change, etc. Professional baseball has comprehensive statistics dating back to the 1860s and the result is that people have divided the sport into eras, and when you compare players in different eras you don't look at the stats alone, you compare how they performed relative to their peers, etc.
A "high score" list that ignores the reality of change is worthless.
> Yes, based on literally thousands of hours of video footage.
Well that's fantastic! Probabilities can be established for all sorts of in-game occurrences and the probability of this dude's game being legit or not.
Not only that, but the gamer ability can then be separated from the randomness of the game on any particular play! Are all the high scores the result of aberrations in the game, or because the player is just that great???
Speedrunners are very well aware of all the probability based events of the games they play, as well as the odds of those events and any circumstances that can change them [0]. It's called 'luck manipulation'. Usually that's only really useful to tool assisted runs, but on occasion luck manip can be performed by human players.
Regardless, while those in-the-know can recognize that a good run would have been a record if not for an unlucky event, at the end of the day all that matters is your time (or score). Accounting for the randomness is part of the strategy aspect of the sport.
[0] People who speedrun a particular game will also know of any differences in those probabilities across all known versions of the game. These people have studied these games so deeply they usually know more about how they work than the people who made them.
Probabilities have been calculated from Billy's footage that shows his alleged arcade games rendering as MAME. His random hammer smashes give points way higher than the mean, suggesting he stitched save states in an emulator.
If I recall correctly from King of Kong, for at least some people they do inspect the machines to see if they are original. There are tons of rom hacks and modded machines.
I recall in the documentary that they came to inspect Steve Weibe's machine (I think there was controversy because they just came in to his garage and started looking without asking first and they didn't seem to give Billy the same scrutiny.)
I don't agree with the downvotes: it's a concept that should get more discussion, in the sense of "where should the line be drawn between common carrier behavior and publisher behavior?"
Agree, it's the top story on my news feed here in the midwest.
It's probably going to get somewhat diminished coverage, as by Monday it's highly likely that there will be 4 named storms in the Atlantic, with a large hurricane forecast to hit Bermuda and another bearing down on Texas or Lousiana by the end of the week.
We've got an expensive infrared medical thermometer (purchased long before Covid) and it appears to be quite accurate for everyone in our family except me. According to it, I am pretty reliably dead.
> The Haymarket affair (also known as the Haymarket massacre, Haymarket riot, or Haymarket Square riot) was the aftermath of a bombing that took place at a labor demonstration on May 4, 1886, at Haymarket Square in Chicago. It began as a peaceful rally in support of workers striking for an eight-hour work day, the day after police killed one and injured several workers. An unknown person threw a dynamite bomb at the police as they acted to disperse the meeting, and the bomb blast and ensuing gunfire resulted in the deaths of seven police officers and at least four civilians; dozens of others were wounded.
In a typical year, the police and fire helicopters spend more time doing search and rescue on the lake [0] and aerial coordination at actual fires than anything else. They're assets to the city.
[0] Chicago has just about the same amount of coastline as SF - from Mussel Rock Park all the way around to Brisbane is almost exactly the same distance as the Indiana state line to Evanston.
I just picked out a few cities - Chicago [0], NYC [1], and Wichita [2] and it turns out that they all spend very similar amounts per FTE (105-120k). I tried to find the online budget for my hometown PD, but couldn't.
Also, you should budget 25-50% of your project time and effort on getting the legacy system "ready" for a migration.