Abstract: A cellular mobile radio systems includes fixed stations and mobile stations, a radio cell being subdivided into sub-cells and each sub-cell being assigned its own allocation of radio channels. The values of radio parameters of the fixed stations are measured and evaluated for assigning a mobile station to a sub-cell. To achieve an additional increase of the radio channel capacity of such system, a position vector is assigned to each respective mobile station which is derived from the measured parameters. A mobile station is then assigned to a specific sub-cell on the basis of its position vector.

Abstract: A wrist instrument has an expandable strap for use in securing the instrument about a wearer's wrist. The expandable strap has a strap casing or a sheath on each end and an interconnecting member attached to the strap casings. The interconnecting member includes a non-expandable section and at least one elastic member housed in one of the strap casings. The elastic member is attached to both the strap casing housing it and the non-expandable section of the interconnecting member such that when a pulling force is exerted on the interconnecting member, the elastic member expands within the strap casing to allow the strap to accommodate different wrist sizes without exposing the elastic member to view.

Abstract: A system for transferring data from a CRT (cathode ray tube) video display monitor on a personal computer to a portable information device such as a multifunction electronic wristwatch. The CRT video display has a video signal generator providing raster scanning of the screen and a program for formatting the binary coded data into blocks of serial data bits, with start bit and stop bit. The blocks of data are supplied to the video signal generator in synchronism with raster scanning of the screen so as to provide an integral number of one or more blocks of data for each vertical frame, and modulated to vary the brightness of the screen and provide scan line segments providing light pulses corresponding to presence or absence of binary coded transmitter pulses. The scan line segments commence at selected screen coordinate locations, such that each successive scan line segment representing a data bit commences at a different temporal position along the scan line than the preceding scan line segment.

Abstract: A slot selection algorithm for use in a multi-slot TDMA communications system which has provision for transmissions requiring a single time slot or a double time slot. The algorithm requires that whenever possible a transmission requiring a single time slot is allocated to an acceptable, but not necessarily the best, inactive time slot which is located adjacent to an active time slot in a TDMA frame. By so doing the number of inactive time slots available for double time slot transmissions may be increased.

Abstract: A liquid crystal display is provided using a flat panel of microlamps being formed from gas discharge display structures and made by the method of making the same utilizing integrated circuit fabrication techniques. The flat panel of microlamps is formed into an array for providing light to individual pixels, or a small number of pixels, in a liquid crystal display. Such microlamp lighting can increase the illumination of LCDs.

Abstract: A radio communication system comprises at least a base station which is remote from a concentrator to which it is linked by a channel. The base station is intended to exchange via a radio link, at a first rate, radio frames with terminals while the radio frames are multiplexed on a channel frame to be transported by the channel at a second rate. In accordance with the invention, multiplexing is effected to minimize a resulting delay, to maximize a permitted transmission delay and thus maximize the range of base stations.

Abstract: An analogue signal coder including circuitry for digitizing the analogue signal, deriving a long term correlation coefficient for the analogue signal and for deriving a number of short term coefficients. The coder also includes circuitry for deriving an excitation sequence which can be used to synthesize an approximation to the analogue signal. The circuitry for deriving a long term coefficient derives a plurality of sums of products of samples of the digitized signal and interpolates the sums of products. The long term correlation coefficient is derived from the interpolated plurality of sums of products with fractional resolution and reduced computational complexity.

Abstract: A wristwatch is set by optically transmitting time of day information from a wall clock or table clock to an optical sensor in the wristwatch. The time information is optically transmitted as sequential light pulses by controlling a light source, such as a light emitting diode (LED) in the wall clock or table clock.

Abstract: A receiver including two sigma delta modulators used to convert a pair of analog quadrature signals into digital quadrature signals. In such sigma delta modulators the quantization noise is shifted into a frequency region in which no signal is present. A cross coupling between the filters is provided to improve the noise reduction without increasing the order of the filters. By providing the cross coupling, it is possible to obtain complex poles and zeros in the noise transfer function which do not have to appear in complex conjugate pairs which results in an increase of the noise suppression in a specified frequency range.