Communication controller for an active transponder
First Claim
1. Method for processing of encoded information by a battery-powered active transponder, provided for the application within a transponder system for the wireless payment of road toll, comprising:
- receiving modulated microwave radiation of preset frequency by the transponder over the antenna and for obtaining an input signal demodulated for obtaining a binary input data sequence, feeding said binary input data sequence to a digital processor (microcontroller) operated by a processing clock of preset clock frequency for decoding and generating of a binary output data sequence, forming an output signal from an answer to the received input signal within a certain duration and transmitting over the antenna of the transponder, characterized in that for reducing the load of the battery of the transponder by the pulse-like occurring current demand of the processor with at the same time a relative short duration between the receiving of the input signal and the irradiating of the output signal data, the decoded input data sequence are processed by the processor parallel and with a relative low clock frequency.
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Abstract
A method for processing of encoded information by a battery-powered active transponder is disclosed for the application within a transponder system for the wireless payment of road toll having the steps of receiving modulated microwave radiation of preset frequency by the transponder over the antenna and for obtaining an input signal demodulated for obtaining a binary input data sequence, feeding said binary input data sequence to a digital processor (microcontroller) operated by a processing clock of preset clock frequency for decoding and generating of a binary output data sequence, and forming an output signal from an answer to the received input signal within a certain duration.
25 Citations
9 Claims
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1. Method for processing of encoded information by a battery-powered active transponder, provided for the application within a transponder system for the wireless payment of road toll, comprising:
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receiving modulated microwave radiation of preset frequency by the transponder over the antenna and for obtaining an input signal demodulated for obtaining a binary input data sequence, feeding said binary input data sequence to a digital processor (microcontroller) operated by a processing clock of preset clock frequency for decoding and generating of a binary output data sequence, forming an output signal from an answer to the received input signal within a certain duration and transmitting over the antenna of the transponder, characterized in that for reducing the load of the battery of the transponder by the pulse-like occurring current demand of the processor with at the same time a relative short duration between the receiving of the input signal and the irradiating of the output signal data, the decoded input data sequence are processed by the processor parallel and with a relative low clock frequency. - View Dependent Claims (2, 3, 4, 5)
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- 6. Communications controller (17) for a battery-powered active transponder provided for the application within a transponder system for the wireless payment of road toll, whereby the transponder over an antenna receives modulated microwave radiation of preset frequency for obtaining an input signal which is demodulated for obtaining a binary input data sequence, which then is fed to a digital processor (17) (microcontroller) operated by a processing clock of preset clock frequency for decoding and generating of a binary output data sequence, from which within a certain duration as an answer to the received input signal an output signal is formed, which is transmitted over the antenna of the transponder, characterized by a plurality of processor modules (19-22) of the processor (17) which are integrated to a processing unit realizing the parallel occurring processing of data of the decoded input data sequence and are operated by a timing generator (symbol clock retrieving circuit 18) with a relative low clock frequency of the processing clock rate.
Specification