Abstract:
A traffic condition monitoring system, provided in a base station installed by a side of a road for monitoring a traffic condition based upon communication signals transmitted from mobile terminals in a plurality of vehicles traveling on the road, includes a receiver part operable to receive the communication signals transmitted from the mobile terminals in the respective vehicles to output received signals, a speed/direction estimation part operable to estimate traveling speeds and traveling directions of the respective vehicles based upon the received signals, and a traffic condition analysis part operable to determine effective traveling speeds of the respective vehicles in each traveling direction, to calculate an average traveling speed of a group of vehicles in each traveling direction, and to analyze a traffic condition in each traveling direction based upon the average traveling speed of the group of vehicles in each traveling direction.
Abstract:
An electronic circuit module includes a circuit board provided with the connector section, electronic parts provided on a mounting surface of the circuit board, a metallic board provided with a bonding section, which is superimposed on a part of the mounting surface of the circuit board, and an extension section which extends from the circuit board and is formed with the fixing through holes, a connection member that connects the circuit board to the metallic board, and a shim member superimposed at the same side as the circuit board with respect to the extension section of the metallic board, and having a thickness substantially identical to a thickness of the circuit board.
Abstract:
Disclosed is a CDMA receiver including a delay profile generating unit for generating a plurality of delay profiles in time slots; path detecting units for detecting paths from the plurality of delay profiles; delay spread calculating units for calculating delay spreads based upon the detected paths; a finger-number-allocation calculating unit for calculating a number of fingers to be allocated based upon number of detected paths and delay spreads; and finger allocating units for allocating fingers to the detected paths from the number of fingers to be allocated as calculated by the finger-number-allocation calculating unit.
Abstract:
A switching circuit (112) is controlled by an in-slot interface-noise-power-control output circuit (115) to output an in-slot interface noise power (107-n) to a past-slot interference-noise-power memory (110), if there is no estimated value for an interference noise power of finger n of one slot before. If the interference noise power of the one slot before is not estimated and yet there exists an interference noise power which has been once estimated, the past-slot interference-noise-power memory (110) stores therein an interference noise power in a last slot which has been valid. An inter-slot averaging processing is performed between the interference noise power (111-n) from the past-slot interference-noise-power memory (110) and an estimated value (107-n) for the interference noise power in the current slot.
Abstract:
A communication terminal device includes a wireless LAN module configured to search a plurality of communication channels by channel scanning in order to find a communication channel available for communication and configured to perform wireless communication using the found communication channel through a wireless LAN. In a search process by channel scanning for searching for the communication channel available for communication, if the communication channel available for communication is not found within a predetermined time period from the beginning of the search process, the wireless LAN module stops the search process, and an operation mode of the wireless LAN module is shifted from a normal operation mode to a power-saving mode.
Abstract:
A switching circuit (112) is controlled by an in-slot interface-noise-power-control output circuit (115) to output an in-slot interface noise power (107-n) to a past-slot interference-noise-power memory (110), if there is no estimated value for an interference noise power of finger n of one slot before. If the interference noise power of the one slot before is not estimated and yet there exists an interference noise power which has been once estimated, the past-slot interference-noise-power memory (110) stores therein an interference noise power in a last slot which has been valid. An inter-slot averaging processing is performed between the interference noise power (111-n) from the past-slot interference-noise-power memory (110) and an estimated value (107-n) for the interference noise power in the current slot.
Abstract:
A method for accessing an access point (AP) in a wireless LAN and a station are provided, in which the station determines current country and more effectively and quickly performs access to an AP when accessing the AP in a worldwide roaming environment. The method manages a plurality of profiles by grouping them for each country, and attempts to access systematically and automatically access points, which are set in the multiple profiles included in the profile groups of each country based on the country information in a beacon received from an AP. The country information and the profile information may be stored in a memory, and the access to the AP is performed based on the stored information, when next accessing an access point.
Abstract:
The N peaks are selected from a delay profile in order starting from the highest peak involved in the delay profile, the path level and path timing are determined for each of the selected peaks, and the identical paths individually responsible for different delay profiles are detected by comparing the path timings calculated for the preceding time and the path timings calculated for the present time. Based of the path levels calculated for the preceding time and the path levels calculated for the present time, averaged path levels are computed on a path-by-path basis for the present time, a predetermined threshold is applied to the computed average path levels, and the paths to be allocated to the fingers are selected. Of the path timings that have been obtained for respective selected paths, the latest path timings are allocated to the fingers as synchronization timings.
Abstract:
A traffic condition monitoring system, provided in a base station installed by a side of a road for monitoring a traffic condition based upon communication signals transmitted from mobile terminals in a plurality of vehicles traveling on the road, includes a receiver part operable to receive the communication signals transmitted from the mobile terminals in the respective vehicles to output received signals, a speed/direction estimation part operable to estimate traveling speeds and traveling directions of the respective vehicles based upon the received signals, and a traffic condition analysis part operable to determine effective traveling speeds of the respective vehicles in each traveling direction, to calculate an average traveling speed of a group of vehicles in each traveling direction, and to analyze a traffic condition in each traveling direction based upon the average traveling speed of the group of vehicles in each traveling direction.
Abstract:
A channel estimation circuit (12) of an individual CH path demodulation unit (1A-1L) performs a channel estimation from an individual CH. A channel estimation value correction circuit (22) of a shared CH path demodulation unit (2A-2L) then corrects a reception power fluctuation due to uplink transmission power control which is caused by the timing offset between the individual CH and the shared CH. The resultant data is used for the demodulation by a shared CH demodulation circuit (23).