Abstract: An integrated circuit bus for the transmission of a serial data signal, to be used in integrated circuits, wherein the data is clocked only to one addressed register, and thus cross-talk is reduced. In the bus all information signals are contained in one signal. The data transmission is based on pulses of different lengths corresponding to different states.

Abstract: In the booster (20) of a cellular radio telephone (20) the diversity reception is arranged so that the quality, e.g. the level, of the received and amplified (Rx1, Rx2) signal is detected (A1, A2), the better signal is selected by a logic (DP), and the selected better signal is connected (SWb) to the connection (C1) of the cellular radio telephone's antenna cable (AC). The arrangement includes a circuit (TF, DP) for receiving timing information from the cellular radio telephone in order to synchronize the operation of the cellular radio telephone and the booster.

Abstract: A circuit board assembly including a shielding housing mounted on a circuit board (1), the shielding housing being intended for radio-frequency shieldings. The shielding housing (3) having a wall inclined at an angle .alpha. to a plane orthogonal to the plane of the circuit board. The housing of the circuit board assembly being suitable for at least a partial embedding into an exterior wall of an electronic apparatus.

Abstract: A double dwell, maximum likelihood, serial sliding acquisition system (10) employs two thresholds which are a function of maximum likelihood thresholds, and not predetermined optimal thresholds. The two thresholds have values that are signal dependent, and are obtained in real time from a correlation of a received PN signal and a locally generated PN sequence during the acquisition process. The acquisition system continuously monitors the reliability of the detected signal. As a result, the decision making process is continuously performed so as to terminate the acquisition process whenever the detected signal is determined to be reliable. The acquisition system employs a principle that an optimal threshold level, in the power domain, is 6 dB lower than that of the maximum likelihood signal.

Abstract: The object of the invention is a circuit for monitoring the power of a transmitter amplifier. In the solution according to the invention, the detected DC voltage level (V.sub.det) corresponding to the output power is compressed at high output levels by using as the coupling capacitance a capacitance diode (7) such that the capacitance of this component, and thereby the tightness of the coupling, diminishes as the detected voltage level increases. The invention can be employed, for example, in the power control of a mobile phone's transmitter.

Abstract: Disclosed herein are methods and apparatus for improving the quality of synthesized speech that is transmitted through a channel that is susceptible to transmission errors. In a presently preferred embodiment of the invention a speech signal is assumed to be first encoded using a Linear Predictive Coding (LPC) technique prior to transmission. The parameters that describe the short-term spectral behavior of the speech signal are received and then applied to and processed by a non-linear median processing block only on an occurrence of a predetermined number of transmission errors in the received LPC speech signal. The median-processed short term speech parameters are subsequently employed, together with a received excitation signal, in a synthesis filter to synthesize a speech signal of improved quality over what would be obtained if the short term speech parameters were not median processed to compensate for the transmission errors.

Abstract: The inventive data decoding system provides 3/5 voting on data blocks (1 . . . 11) received in a frame. A counter circuit of the system counts the bits in the data blocks and raises a repeat flag (RFLAG) at the end of each data block. The RFLAG signal causes an interrupt in a controlling processor, enabling the processor to monitor and control the receiving synchronism. The inventive procedure can be used on Forward Control Channel (FOCC) and Forward Voice Channel (FVC) channels in the Total Access Communication System (TACS) or the Advanced Mobile Phone Services (AMPS) mobile phone systems.

Abstract: A circuit arrangement is disclosed for reducing the adverse effects of interference in a signal of interest. The circuit arrangement includes a matched filter for receiving the signal of interest and a median filter coupled to the output of the matched filter. The median filtered output signal of the matched filter is utilized to remove interference, to calculate the threshold level, or to estimate the interference level at the output of the matched filter.

Abstract: In a method according to the invention the tuning information determined by a measuring computer (20) is stored in the memory of the radio telephone (1). In operation the microprocessor (10) receives from the sensors (14) information e.g. about the temperature, according to which it selects from its memory tuning data and adjusts signal levels and deviations through logic controlled amplifiers (16, 17). The tuning can be made automatically, without opening the casing of the radio telephone.

Abstract: In a decoding system according to the invention, a digital signal received from an AWGN channel interfered by pulse interferences is so decoded (8) that the AGC control signal (10) of the RF/IF circuits of the reception is produced by median filtering (21) for the essential removal of the effect of pulse interferences, and that the interference is measured using a linear metric, whereby an external interference estimation circuit (30) is preferred.