Ericsson Mobile Communications

About: Ericsson Mobile Communications is a based out in . It is known for research contribution in the topics: Terminal (electronics) & Signal. The organization has 1729 authors who have published 2689 publications receiving 61103 citations.

A time and frequency synchronization scheme for multiuser OFDM

Abstract: We present a multiuser synchronization scheme for tracking the mobile's uplink time and frequency offsets. It uses the redundancy introduced by the cyclic prefix and does not need additional pilots. We show performance results of an orthogonal frequency division multiplexing (OFDM)-based radio interface based on the universal mobile telecommunication system (UMTS) parameters. For a UMTS-typical mobile channel environment, the performance of a coherent system employing the scheme is virtually indistinguishable from the performance of a perfectly synchronized system. In a differentially modulated system, synchronization errors decrease the system performance by about 0.7 dB compared to a perfectly synchronized system.

On the use of MOS varactors in RF VCOs

Abstract: This paper presents two 1.8 GHz CMOS voltage-controlled oscillators (VCOs), tuned by an inversion-mode MOS varactor and an accumulation-mode MOS varactor, respectively. Both VCOs show a lower power consumption and a lower phase noise than a reference VCO tuned by a more commonly used diode varactor. The best overall performance is displayed by the accumulation-mode MOS varactor VCO. The VCOs were implemented in a standard 0.6 /spl mu/m CMOS process.

Power transmission control device, power reception control device, non-contact power transmission system, power transmission device, power reception device, and electronic instrument

Abstract: A power reception device transmits authentication information (e.g., start code, manufacturer ID, product ID, rated power information, and resonance characteristic information) to a power transmission device before starting normal power transmission by a non-contact power transmission system. The power transmission device performs instrument authentication based on the received authentication information, and regulates the maximum transmission power is regulated to conform to a power-reception-device side rated power. The power transmission device then performs normal power transmission.

Information processing apparatus, information processing method, information processing program, and mobile terminal device

Abstract: An information processing apparatus includes a content detector portion, a display controller portion, an operation state detector portion, and a popup display controller portion. The content detector portion detects contents belonging to a same time range from different types of contents each including time information. The display controller portion collects the contents belonging to the same time range and having been detected by the content detector portion. In addition, the display controller portion then displays, on a display portion along a time series, content-related graphical information of the respective contents collected in units of the respective time range used when collecting the respective contents, and displays on the display portion a selector serving to select a desired content from among respective contents displayed through the content-related graphical information. The operation state detector portion detects an operation state of an operation portion serving to perform an operation of moving the selector. In accordance with time information of a content selected by the selector when a predetermined operation state of the operation portion is detected by the operation state, the popup display controller portion detects a content having past time information with respect to the time information of the selected content, and popup displays content-related graphical information of the detected content on the display portion.

Method and system for detecting movement of an object

Abstract: A system, method and computer application for electronic equipment (10) having a contact-less user input device that is capable of detecting and/or sensing user movement (e.g., gestures) and controlling one or more parameters associated with the electronic equipment and/or being executed on the electronic equipment based at least in part on the detected and/or sensed user movement is disclosed. A predetermined movement may be detected by the movement detection circuitry (20) (e.g., camera, infrared sensors, etc.) and a corresponding user controllable feature or parameter of the electronic equipment and/or application program may be controlled based upon the detected predetermined movement. The controllable feature may vary based upon the type of application being executed by the electronic equipment and velocity and/or acceleration of the object being detected.