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In order to work well, a jamming signal must be well-correlated with the signal it is trying to jam. In the case of sine-wave modulated signals, it's easy to detect the signal one wishes to jam, to infer that it's narrowband (and, hence, riding on a real or suppressed sine-wave carrier), to infer its bandwidth, and from there to choose a suitable jamming ...


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The aim is to get SINR of the desired receiver low. Take a high power signal and spread it in the desired bandwidth. For ex: take any bit sequence and spread it in a bandwidth using CDMA like pseudo noise sequence. The bandwidth in which the sequence is spread will depend upon the chipping rate of the pseudo noise sequences. If the power of the interferer ...


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Almost any kind on in-band interference (like Gaussian noise) will mess up the GSM signal and prevent its correct reception. Note, however, that: Transmitting on the GSM band without a license is illegal in many locations. Tampering with cell phone operation in general is also illegal. If you insist on doing this, one approach would be to set up a GSM base ...


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You could use an antenna array to focus the transmission to the intended receiver only and to send a more powerful jamming signal to all other directions.


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Signal integrity is a full area of electrical engineering and signal engineering. A few examples : To protect a propagating signal in free-space you can emit it louder (=more transmitting power, hence increasing signal to noise ratio (SNR)). Numerical transmissions often include error correcting codes. To protect propagating signals in cables, most of them ...


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