Abstract: A system for efficient routing in a multiple hop wireless communication network comprising a plurality of network nodes is presented. The system acquires quality information indicating link status between the infrastructure nodes. The link quality information is used in a route determination process in the infrastructure nodes using a predictive procedure. The link quality information includes information about a time varying information of the link status. The predictive procedure uses the time varying information of link status, and a router data packets according to the determined route.

Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The routing method comprise the steps of providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining an appropriate route according to said link status information with respect to traffic content, and routing traffic according to said determined appropriate route.

Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The invention is characterized in that data packets are routed over transmission paths using the following steps providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining possible routes with essentially similar link quality status for said data packet, and routing said data packet via the determined routes.

Abstract: The present invention relates to a system for efficient routing in a multiple hop wireless communication network comprising a plurality of network nodes is presented. The system comprises means (3001) for acquiring quality information indicating link status between said infrastructure nodes, means (3002) for using said link quality information in a route determination process in the infrastructure nodes using a predictive procedure, said link quality information containing information about a time varying information of said link status; and said predictive procedure uses said time varying information of link status in the predictive procedure; and routing means (101) for routing data packets according to a determined route.

Abstract: The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The invention is characterized in that data packets are routed over transmission paths using the following steps providing link status information by acquiring link status quality between nodes in the network, updating a routing element (101) with said link status information, determining possible routes with essentially similar link quality status for said data packet, and routing said data packet via the determined routes.

Abstract: The present invention relates to an improved radio resource management in a telecommunication network. This is achieved by means of improving the information that is provided to the responsible resource management units. Such improvement is achieved by collecting various types of information from various sources and by refining said information in order to achieve an increased predictability of parameters that determine the resource needs of the network.

Abstract: A matched filter requiring no high-speed processor and which consumes less power is disclosed. Partial filters 301–30N obtained by dividing number of matched filter taps by N are provided with a controller 341 for controlling which partial filters are enabled. The controller 341 is supplied with maximum amount of delay of an input signal and with symbol timing. On the basis of the maximum amount of delay, the controller 341 enables only the minimum number of partial filters 301–30n that are capable of executing an amount of computation that is required in one symbol period. The enabled partial filters are used multiple number of times per symbol period and the output, each time, integrated sample by sample. Since the disabled partial filters will not operate, it is possible to reduce power consumption and computation time.

Abstract: Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.

Abstract: A temperature control simulation method and apparatus for forming a temperature system simulation model on a computer, provide substantially the same response or simulation characteristics as a temperature change in an actual furnace, whereby a temperature control algorithm can be developed and the method or manner of manipulating the temperature control can be learned without using an actual furnace. A transfer function is determined which represents a relationship between a heater input and a temperature output. A temperature control simulation for a heating furnace is executed using the transfer function of a heating furnace as a transfer function that a temperature system simulation device uses.

Abstract: A mobile station (mobile communication unit) receives system software from a base station via an antenna and a transmitter/receiver, and stores the received system software in a memory. A digital signal processor in the mobile station then performs communication processing according to the system software stored in the memory. By transmitting various system software from the base station, the single mobile station can easily be adapted to different communication principles. The base station also receives system software from a center via a public exchange network, and stores the received system software in a memory. A digital signal processor in the base station then performs communication processing according to the system software stored in the memory.

Abstract: A first searcher searches a first channel (e.g., a broadcast channel), a second searcher searches a second channel (e.g., a traffic channel), and the second searcher uses information from the first searcher to search the second channel. In one aspect of the invention, the first searcher generates a delay profile for the first channel. A second searcher uses the delay profile to generate a set of taps for the second channel. In another aspect of the invention, the first searcher is configured to find a maximum correlation value (or a set of maximum correlation values). The second searcher shifts a search finger by an amount equal to the delay corresponding to the maximum correlation value(s). The second searcher can also shift a code corresponding to the second signal by an amount equal to the sum of the delay corresponding to the maximum correlation value(s) and a predetermined value.

Abstract: A despreading circuit which can reduce a circuit scale and power consumption is described. The circuit includes an A/D converter which converts a CDMA modulated analog signal to a digital signal of N bits, and a searcher which defects a synchronization phase from high-order small bits of the N bits and outputs synchronozation phase information to a control circuit. The control circuit transmits a signal for allowing despreading to be performed to a sliding correlator based on the phase information. The sliding correlator despreads the N bit digital signal outputted by the A/D converter and outputs the resulting correlation output as a despreading signal.

Abstract: A semiconductor producing apparatus is capable of quickly and accurately changing a controlled variable to a target value to thereby make the controlled variable quickly follow the target value. Moreover, the controlled variable and target value can be adjusted automatically, thus improving the productivity of a process. The semiconductor producing apparatus includes a PID adjustment section to which a target value and a detected control value are inputted through an adder, a pattern generation section having an approximate function for calculating a pattern output and making it possible to change the pattern output in accordance wit parameter values of the approximate function, and a switcher for switching between an output including at least an output of the pattern generation section and an output of the PID adjustment section to thereby generate an output.

Abstract: There is disclosed a despreading circuit which can reduce a circuit scale and power consumption. In the despreading circuit of the present invention, A/D converter converts a CDMA modulated analog signal to a digital signal of N bits, a searcher detects a synchronization phase from high-order small bits of the N bits and outputs synchronization phase information to a control circuit, the control circuit transmits a signal for allowing despreading to be performed to a sliding correlator based on the phase information, and the sliding correlator despreads the N bit digital signal outputted by the A/D converter and transmits the resulting correlation output as a demodulated signal to the outside.

Abstract: The present invention intends to provide a receiver which receives a signal by switching a plurality of communication systems, wherein a circuit scale is reduced to intend to the miniaturization of a device. The receiver converts a received signal to a base band signal by a local oscillation frequency based on the selected communication system by a mixer, limits a band by an LPF through which signals of all communication systems can pass, performs a band limitation based on the communication system by weighting with a tap coefficient based on the selected communication system to synthesis by a transversal filter, and demodulates a signal by a demodulation system based on the selected communication system by a demodulating unit.

Abstract: A matched filter for use in a radio telephone receiver that receives Code Division Multiple Access (CDMA) signals. The matched filter produces precombinations of input values to significantly reduce the number of multiplication and addition operations, compared to conventional matched filters, required to produce a correlation value. This reduced number of required operations, along with a reduced number of delay elements required to despread CDMA signals, significantly reduces the overall power consumption of the matched filter. The use of such a matched filter in a device like a cellular phone, for example, would thus lead to longer battery life.

Abstract: Mobile radio communications apparatus having a plurality of transmitting antennas for performing transmission upon selecting whichever of these plurality of antennas is appropriate, wherein the appropriate antenna can be selected even in a case where an object that influences antenna characteristics is in close proximity to the antenna is disclosed. The level of reflected-waves from whichever of the antennas 3, 4 has been selected by a switch 44 is measured by a reflected-wave measurement circuit 48. If the amount of level variation exceeds a predetermined value, the other antenna is used by changing over the switch 44.

Abstract: A matched filter requiring no high-speed processor and which consumes less power is disclosed. Partial filters 301-30N obtained by dividing number of matched filter taps by N are provided with a controller 341 for controlling which partial filters are enabled. The controller 341 is supplied with maximum amount of delay of an input signal and with symbol timing. On the basis of the maximum amount of delay, the controller 341 enables only the minimum number of partial filters 301-30n that are capable of executing an amount of computation that is required in one symbol period. The enabled partial filters are used multiple number of times per symbol period and the output, each time, integrated sample by sample. Since the disabled partial filters will not operate, it is possible to reduce power consumption and computation time.

Abstract: Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.

Abstract: A despreading circuit which can reduce a circuit scale and power consumption is described. The circuit includes an A/D converter which converts a CDMA modulated analog signal to a digital signal of N bits, and a searcher which detects a synchronization phase from high-order small bits of the N bits and outputs synchronization phase information to a control circuit. The control circuit transmits a signal for allowing despreading to be performed to a sliding correlator based on the phase information. The sliding correlator despreads the N bit digital signal outputted by the A/D converter and outputs the resulting correlation output as a despreading signal.