Abstract: In an embodiment a method for recovering an error state of an integrated circuit card, wherein the integrated circuit card is coupled to a transmitter device via a serial communication interface including at least a serial clock signal line on which a serial clock signal is transmittable from the transmitter device to the integrated circuit card, wherein the method includes upon detecting the error state, embedding, by the transmitter device, a reset signal in the serial clock signal; sending, by the transmitter device, the serial clock signal as reference clock signal on the serial clock signal line to the integrated circuit card, the reset signal representing a variation of parameters of the serial clock signal; checking, by the integrated circuit card, a presence of the variation of parameters of the serial clock signal; and upon checking the presence of the variation of parameters, performing, by the integrated circuit card, a transition from the error state to a reset state.

Abstract: An data transmission adjustment system that comprises a server and a plurality of data transmission devices within a sensing region. The server adapts to receive a sensed data from at least one data transmission device, define a timeline, divide the timeline into a plurality of monitoring periods, calculate a ratio of the number of the monitoring periods that have received the sensing data from the data transmission device within the sensing region or not to the number of all the monitoring periods, and broadcast at least one message to the data transmission devices within the sensing region according to said ratio.

Abstract: A method and system for providing a network protocol for utility services are disclosed are disclosed. In one embodiment, a computer-implemented method determines whether a measured real signal strength differs from a an accepted real signal strength by a configurable control limit parameter. In the event the measured real signal strength exceeds either an upper or lower bound based upon the configurable control limit parameter a determination is made whether there has been an unacceptable number of measured real signal strengths that exceed either an upper or lower bound based upon the configurable control limit parameter. In the event there has been an unacceptable number of measured real signal strengths that exceed either an upper or lower bound, which may include reaching or exceeding a configurable out of bound incidence limit, then a determination is made to calculate a new accepted real signal strength.

Abstract: The present invention relates to a method of validating a number comprising a plurality of digits, the number having a maximum value, each digit being successively entered by a user during several stages. The method includes a test stage activated when the number of digits entered is equal to that of the maximum value minus a unit. This test consists in comparing the most significant digit entered with the most significant digit of the maximum value. The test validates the set of digits entered when the most significant digit entered is greater than the most significant digit of the maximum value. The invention also relates to a device capable of implementing the method.

Abstract: A communications receiver includes a digital counter to count transitions of a carrier signal subject to on/off keying.

Abstract: A folder type mobile telephone and control method therefor are provided which utilize an auxiliary display unit viewable whether the folder is opened or closed. The folder type mobile telephone includes an auxiliary display unit and a main body having a main display unit. The folder type mobile telephone includes an opening at a position corresponding to the auxiliary display unit. The folder type mobile telephone may include a wheel button formed at one side of the main body to input user commands to the auxiliary display unit. A transparent window may be formed at the opening to protect the auxiliary display unit. Regardless of whether the folder is opened or closed, a user can view, and control the auxiliary display unit via wheel button inputs. Since the auxiliary display unit is formed on the main body, the relative thickness of the folder can be reduced to make the folder type mobile telephone compact.

Abstract: The invention provides an apparatus and a method for determining the frequency of a radio frequency signal. The coherency of a received signal is determined and only the frequency of a coherent signal is determined. Zero amplitude transitions of coherent signals are counted in respective time periods. If the counts in each time period agree within a quantization error, the accumulated counts for a fixed time period are employed to determine a frequency. The frequency determining apparatus and method are particularly useful with a frequency agile radio receiver for detecting the presence of radio frequency signals from nearby mobile and stationary transmitters. Upon determination of the frequency of the nearby transmitter, the channel of transmission can be determined from a memory within the receiver and the receiver can be tuned to monitor the transmission. Additional tests to verify the frequency determination may be applied using squelch and window detector circuits of the radio receiver.

Abstract: A broadband receiver exhibiting reduced interference to a frequency counter caused by a local oscillator.

Abstract: A system and method for receiving output signals from each receiver of multiple receivers, the output signals generated based on receipt of a same transmission; incrementing a count value associated with each receiver based on the output signals; and determining whether a fault in a receiver exists based on the associated count values of the receivers.

Abstract: An apparatus for coarse compensation of a direct current (DC) offset in a direct to baseband receiver architecture utilizes a serial analog to digital converter (ADC), such as a Delta-Sigma converter, to convert the received signal to digital form. The output of the ADC is sampled for a predetermined number of samples and a counter coupled to the ADC is incremented each time the sample generated by the ADC is a logic one. The counter is not incremented if the sample from the ADC is a logic zero. After the predetermined number of samples is obtained, the counter value is indicative of the DC offset in the received signal. The counter value may be converted by a code converter to a correction value for easy operation of a digital to analog converter (DAC). If the number of samples from the ADC is a power of two, the code converted may be readily implemented by simply inverting the most significant bit (MSB) from the counter to thereby generate a twos complement version of the counter value.

Abstract: A method and apparatus provide for monitoring radio frequency signals and, in conjunction with the monitoring, determining frequency of a received dominant radio frequency signal. Zero amplitude transitions of the signal are counted in primary and secondary sampling periods to determine frequency and frequency stability. The method and apparatus can be used to tune to radio frequency signals having frequencies in a list of frequencies to be monitored and detecting signals in the radio frequency spectrum on other frequencies. The monitoring and scanning may occur simultaneously, sequentially, or in any order or sequence. The frequencies of dominant signals received are determined and added to the list for monitoring. The receiver may be tuned to a frequency determined immediately upon determination of the frequency determined, after storage of the frequency determined, only after a signal on the currently monitored frequency terminates, or upon other conditions.

Abstract: The invention provides an apparatus and a method for determining the frequency of a radio frequency signal. The coherency of a received signal is determined and only the frequency of a coherent signal is determined. Zero amplitude transitions of coherent signals are counted in respective time periods. If the counts in each time period agree within a quantization error, the accumulated counts for a fixed time period are employed to determine a frequency. The frequency determining apparatus and method are particularly useful with a frequency agile radio receiver for detecting the presence of radio frequency signals from nearby mobile and stationary transmitters. Upon determination of the frequency of the nearby transmitter, the channel of transmission can be determined from a memory within the receiver and the receiver can be tuned to monitor the transmission. Additional tests to verify the frequency determination may be applied using squelch and window detector circuits of the radio receiver.

Abstract: Monitoring and/or alarm device and process including a central unit, at least one intrusion detection peripheral facility, signalling elements and radio link elements allowing radio links on several redundant channels between the central unit and at least one intrusion detection peripheral facility, via which channels this peripheral facility is able to transmit signals to this central unit and wherein elements check the capacity or availability of each of the link channels to transmit the expected signals, elements count the number of available channels and/or the number of unavailable channels and transmission elements transmit to the signalling elements a control signal corresponding to the number of available channels and/or to the number of unavailable channels so as to selectively activate these signalling elements as a function of the state of the control signal.