Re: garage remote jamming

["Nomen Lapetos" <nospam@xxxxxxxxxx>]

"Richard Revis" <richard.revis@xxxxxxxxxxxxxxxxxxx> wrote in message
news:45f13815$1_1@xxxxxxxxxxxxxxxxxxxxxxxxx
> "Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote in message
> news:WoSdnfla97CuGXXYnZ2dnUVZ_tLinZ2d@xxxxxxxxxx
>
>> Would it work if more than one of those frequencies were deliberately
>> jammed?
>
> <delurk>
>
> It depends on how expensive your kit is.
>
> Assuming you have a suitably powerful* frequency agile transmitter then
> jamming problem is not easy.
>
> You can either:
>
> Jam every frequency the transmitter is using; If there are up to 20
> frequencies you need 20 times as much power as jamming a single frequency
> for example.
>
> Hop jamming frequencies when you detect that he has changed transmitting
> freqnecy, which means that he can transmit in the interval required for
> you to catch up. If the hopping is fast enough you may never catch up.
>
> Attempt to guess which frequency he will use next.  If this is essentially
> unguessable - usin a cryptographic RNG or sufficiently complex (and
> unrepeated) predetermined pattern for example - then it's very unlikley
> you can do this.

you don't have to do any of that, there are other ways, knowledge of a
specific frequency is un-necessary, just the band.