Method and safety module for receiving two signals

Abstract

The invention relates to a method for creating an output bit stream (24) for a first signal (s1) of a first carrier frequency by means of a security module (10). According to the method, the security module (10) receives an input signal (s) comprising a first signal (s1) and a second signal (s2) of a second carrier frequency. The first and second signals (s1, s2) are received together. The security module (10) demodulates the input signal (s) by means of a first non-linear component (18), wherein the first non-linear component outputs a first baseband signal (20a). Furthermore, a first bit stream (20b) is generated from the baseband signal (20a), and the first bit stream (20b) is fed to the output logic (13). A mixed signal (21) is formed having a first signal (s1) at a first carrier frequency, a second signal (s2) at a second carrier frequency and a mixing product (22) at an intermediate frequency. The mixed product (22) is demodulated by a second non-linear component (144), the second non-linear component is used to output a second baseband signal (22a), and the second baseband signal is used to combine with the first A signal (s1) is associated to generate a second bit stream (23). The output logic (13) establishes an output bit stream (24) for the first signal (s1), wherein the output logic (13) selects either the first bit stream (20b) or the second bit stream (23) as the output bit stream for the first signal output bitstream.

Description

technical field [0001] The invention relates to a method and a system for establishing an output bit stream for a first signal of a first carrier frequency by a security module and the security module. [0002] In particular, the invention relates to a method for establishing an output bit stream by a security module for a first signal of a first carrier frequency. The security module receives an input signal including a first signal and a second signal at a second carrier frequency. The input signal is demodulated by means of a first non-linear component, wherein the first non-linear component outputs a first baseband signal. A first bitstream is generated from the first baseband signal. Feeds the first bit stream to the output logic. A mixed signal is formed from the first signal and the second signal, wherein the mixed signal includes a mixed product of the first signal at the first carrier frequency, the second signal at the second carrier frequency, and the intermediat...

AI Technical Summary

Problems solved by technology

State-of-the-art UHF-RFID transponders cannot separate UHF-RFID signals and decode them

Especially once the amplitude of the GSM signal exceeds a certain limit relative to the UHF-RFID signal, the UHF-RFID transponder and the UHF-RFID sending / receiving device cannot communicate

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