Abstract: The present invention relates to a circuit arrangement (300) for generating non-overlapping and immune-to-1/f-noise signals as has been described. A break-before-make (BBM) circuit ensures that the differential I/Q signals (LO—0, LO—90, LO—180, LO—270), driving the transistors (M11, M12, M21, M22) of mixers (16A, 16B) in an RF receiver (200), are non-over-lapping for having at any time only one of these transistors turned on. The duty cycle of each driving signal is measured, and the difference (?) in the duty cycle corresponding to two subsequent LO phases is determined through a respective differential amplifier (38A-38D). Each differential amplifier is configured to have a current output (LT—0, LT—90, LT—180, LT—270), which is then fed back to the input of the input buffer (30A-30D) corresponding to the first LO phase in order to adjust its logic threshold (LT) level and make the difference (?) equal to zero.

Abstract: A contact allocation method for a subscriber smart card (300) in a mobile terminal (100) fitted with said card, the mobile terminal including at least first and second electronic modules (130, 140) suitable for communicating with the subscriber smart card (300) using respective first and second communications protocols. To enable the way in which the contacts of the subscriber smart card (300) are allocated to be managed dynamically, the card is connected to the first and to the second electronic modules (130, 140) in alternation by selectively connecting at least one contact (C4) of said card to the first or to the second electronic module (130, 140).

Abstract: In a receiver of a UMTS telecommunication system a process for performing the Outer Loop power control in a User Equipment is provided. The receiver includes an improved outer loop power control mechanism that estimates a Signal to Interference target (SIRtarg) based on a Block Error Rate target (BLERtarg) received from a base station. The outer loop control mechanism estimates a BLER value (BLERest) based on a number of received blocks and then adjusts a SIR target value (SIRtarg) based on the relationship between BLERtarg and BLERest. Meanwhile, simultaneously in parallel, the outer loop power control mechanism monitors for a potential convergence of a first SIR value with the SIRtarg and upon detection of such potential convergence applying a correction to SIRtarg.

Abstract: A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large frequency offsets that are associated with less expensive reference frequency crystals. The system employs a multi-mode filter including an FB filter and a channelization filter. In one embodiment, the FB filter is employed until an FB is located and then, once the FB is located, the channelization filter is employed to receive signals.

Abstract: A system and method for packet-based communications is performed by implementing arbitrated packet-based communications. According to an example embodiment, packet-based data is arbitrated and output with verification data. For each arbitrated packet stream, verification data is generated in response to detecting an end of frame (EOF) symbol in the arbitrated packet stream, and the verification data is added to the packet stream. A merged packet stream is provided at an output, the merged packet stream including the plurality of arbitrated packet streams with verification data added thereto.

Abstract: A method of performing software validation testing on large electronic systems applies Usage Concepts specially modelled as Markov chains to forrealize the expected use of the system, to define the system behavior, and to introduce statistical measurements. The functional requirements of the software system are defined in a Markov chain by identifying a plurality of states through which the software system transitions when performing the functional requirements. Stimuli and responses which cause the software system to transition from one state to another are identified, and the probability of each state transition is calculated. Usage cases beginning at an invocation state and ending at a termination state of the software system are defined and listed in order of descending probability of occurrence in a Usage Profile. The Usage Profile, stimuli, and responses are automatically compiled into an automated test program, and associated test equipment is automatically programmed to generate a set of test cases.