Showing papers by "Motorola published in 2011"

Positioning Reference Signal Assistance Data Signaling for Enhanced Interference Coordination in a Wireless Communication Network

Abstract: A method in a wireless communication terminal is disclosed. The method includes receiving a first signal including a desired second signal and an interference component, wherein the interference component includes at least a third signal transmitted in an Almost Blank Subframe (ABS) by a neighbor cell, and configuring the wireless communication terminal to employ interference reduction to process the first signal based on a configuration of the interference component.

Interference mitigation in a device having multiple radios

Abstract: A wireless terminal that supports operation on a first wireless technology and operation on a second wireless technology performs a first set of measurements on a received signal on first operating frequency of the first wireless technology, wherein the first set of measurements are performed during time periods that overlap time periods during which the wireless terminal transmits signals of the second wireless technology. The terminal also performs interference avoidance to avoid interference from transmissions of signals of the second wireless technology to reception of signals of the first wireless technology if the first set of measurements indicates interference due to transmission of signals of the second wireless technology by the wireless terminal.

Interference measurements in enhanced inter-cell interference coordination capable wireless terminals

Abstract: A wireless communication terminal is disclosed The terminal includes a transceiver coupled to a processor configured to estimate a signal power associated with a second transmission from a second base station, wherein the second transmission is part of a signal received at the terminal wherein the signal includes a first transmission from a first base station and the second transmission from the second base station The processor is also configured to estimate a Receive Signal Strength Indicator (RSSI) of the received signal, and to subtract the signal power associated with the second transmission from the estimated RSSI to obtain a modified RSSI

Electronic apparatus having microphones with controllable front-side gain and rear-side gain

Abstract: An electronic apparatus is provided that has a rear-side and a front-side, a first microphone (420) that generates a first signal (421), and a second microphone (430) that generates a second signal (431). An automated balance controller (480) generates a balancing signal (464) based on an imaging signal (485). A processor (450) processes the first and second signals (421, 431) to generate at least one beamformed audio signal (452, 454), where an audio level difference between a front-side gain and a rear-side gain of the beamformed audio signal is controlled during processing based on the balancing signal.

Electronic apparatus for generating beamformed audio signals with steerable nulls

Abstract: An electronic apparatus (100) is provided having a front side and a rear side oriented in opposite directions along a first axis, and a right-side and a left-side oriented in opposite directions along a second axis that is perpendicular to the first axis. A null control signal (565) is generated based on an imaging signal (585). A first microphone (530) located near the right-side of an electronic apparatus generates a first signal, and a second microphone (520) located near the left-side of the electronic apparatus generates a second signal. The first and second signals are processed, based on the null control signal, to generate a right beamformed audio signal (552) having a first directional pattern having at least one first null, and a left beamformed audio signal (554) having a second directional pattern having at least one second null. A first angular location (α) of the at least one first null and a second angular location (β) of the at least one second null are steered based on the null control signal.

Method and precoder information feedback in multi-antenna wireless communication systems

Abstract: A method for two component feedback in wireless communication systems is disclosed, with a wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix has at least two columns, the wireless communication device sending a second representation of a second matrix chosen from a second codebook, and the base station obtaining a precoder from the first representation and the second representation.

Iq imbalance image compensation in multi-carrier wireless communication systems

Abstract: A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition.

Wireless communication device, wireless communication system, and method of routing data in a wireless communication system

Abstract: A wireless communication system (5) comprises a wireless communication device 40 adapted to communicate an IP flow (35) simultaneously over multiple heterogeneous network access interfaces (46, 48). A flow combine and split function in the network combines the multiple IP sub-flows for communication with another network node such as an application server (44). A wireless communication device for use in such a system, and a method of routing data in such a system are also provided.

Enhanced Inter-cell Interference Coordination for Heterogeneous Networks in LTE-Advanced: A Survey

Abstract: Heterogeneous networks (het-nets) - comprising of conventional macrocell base stations overlaid with femtocells, picocells and wireless relays - offer cellular operators burgeoning traffic demands through cell-splitting gains obtained by bringing users closer to their access points. However, the often random and unplanned location of these access points can cause severe near-far problems, typically solved by coordinating base-station transmissions to minimize interference. Towards this direction, the 3rd generation partnership project Long Term Evolution-Advanced (3GPP-LTE or Rel-10) standard introduces time-domain inter-cell interference coordination (ICIC) for facilitating a seamless deployment of a het-net overlay. This article surveys the key features encompassing the physical layer, network layer and back-hauling aspects of time-domain ICIC in Rel-10.

Methods and apparatus for a user interface configured to display event information

Abstract: An embodiment of a user interface of an electronic device is configured to display user interface elements along a timeline. Each displayed user interface element is associated with an event that is characterized by one or more event attributes. The event attributes include a temporal attribute (e.g., a date and/or time). Each user interface element is relatively positioned along the timeline based on its temporal attribute, and each user interface element is displayed with a visual representation of a set of its associated event attributes. The displayed set of event attributes for a particular user interface element is determined based on a position of the user interface element along the timeline and/or a spatial zoom level at the time. The spatial zoom level and/or position along the timeline of each user interface element may be modified based on user inputs.

Display device, corresponding systems, and methods therefor

Abstract: A display system includes a display and a control circuit operable with the display. The display is configured to provide visual output having a presentation orientation. When user input is received, the control circuit can alter the presentation orientation from an initial orientation in response to user input. When non-user events or device events are detected, the control circuit can revert the presentation orientation to the initial orientation in response to the non-user event or device event. Where the presentation orientation has a user input configuration associated therewith, the user input configuration can either be altered with the presentation orientation or retained in an initial disposition.

Method and apparatus in wireless communication systems

Abstract: An apparatus and a method therein include selecting a size of a soft buffer memory partition per component carrier in a Carrier Aggregation scenario. The method supports multiple carriers to select a size of a soft buffer memory partition, the partition associated with receiving data on at least one component carrier, the multi-carrier system comprising at least two component carriers, each component carrier is associated with a configured bandwidth, the apparatus comprising the processor configured to select a size of a soft buffer memory partition for the first component carrier based at least in part on a first total number of soft channel bits, a first number associated with hybrid automatic retransmit request processes, and the configured bandwidth of the first component carrier.

Inter-Modulation Distortion Reduction in Multi-Mode Wireless Communication Terminal

Abstract: A method in a multimode wireless communication device that communicates using a first radio access technology in a first mode and using a second radio access technology in a second mode is disclosed. The device determines a state of the first radio access technology, indicates to the second radio access technology a state of the first radio access technology, and adjusts a maximum transmit power limit associated with either the first radio access technology or the second radio access technology based on the state of the first radio access technology.

Method and Apparatus for Multi-Radio Coexistence with a System on an Adjacent Frequency Band Having a Time-Dependent Configuration

Abstract: A method (500) and apparatus for multi-radio coexistence has a victim user equipment (UE) that receives (515) a sequence of subframes at a first transceiver from a serving base station, measures (520) channel state on the subframes to obtain channel state measurements, determines (530) a high-low interference pattern based on the channel state measurements, and transmits (550) to the serving base station a report that includes an indicator related to the high-low interference pattern. The method can include the victim UE receiving (610) an aggressor reference waveform (ARW) from the second transceiver, determining (620) spatial characteristics of the second transceiver from the ARW, and configuring (630) its antenna system based on the spatial characteristics. The method can have the victim UE determining (640) second transceiver characteristics from the ARW and transmitting (650) information regarding the second transceiver characteristics to its serving base station.

Reference signal for a control channel in wireless communication network

Abstract: A wireless communication terminal receives a first set of pilot signal resource elements and control information in spatial layers in a first resource block in a subframe and a second set of pilot signal resource elements and data in spatial layers in a second resource block in the subframe, wherein the first and second resource blocks span a set of time symbols in a sub-frame, the first resource blocks span a first set of frequency carriers in the sub-frame, and the second resource blocks span a second set of frequency carriers in the sub-frame The terminal decodes the spatial layers in which the control information is received using the first set of pilot signal resource elements The terminal also decodes the spatial layers in which the data are received in the second resource block using the second set of pilot signal resource elements

Agile Model-Driven Development in Practice

Abstract: This article presents practical experiences and lessons learned in defining and implementing an agile model-driven development process using the MDD tools chain. This process and its implementation inherit the merits of scrum, extreme programming, and the Unified Software Development Processes. The experience data demonstrates that combining MDD practices with agile development process can significantly reduce software development cycle time and increase productivity and quality.

System for enabling reliable skin contract of an electrical wearable device

Abstract: A system for enabling reliable skin contact of an electrical wearable device associated with physiological information detected by the wearable device. The system includes a wearable tightness detector powered by a power supply for the wearable device, and a controller for monitoring electrical signals emanating from the power supply and the wearable tightness detector. Also, at least two thermocouples electrically coupled to the wearable tightness detector, along with at least two skin contact modules electrically coupled to the wearable tightness detector. The at least two thermocouples provide the physiological information detected by the wearable device in relation to a subject. An adjustable wearable band is included in the system. The tightness of the wearable band is detected by the wearable tightness detector and an output signal from the at least two thermocouples to ensure reliable physiological information from the subject during the subject's wearing of the wearable device.

Methods and Devices for Clothing Detection about a Wearable Electronic Device

Abstract: A method in a wearable electronic device of detecting clothing includes: detecting whether the wearable electronic device is coupled to a user, determining whether the wearable electronic device is covered, and adjusting one or more device settings of the wearable electronic device. A secondary check can perform an additional determination of whether the wearable electronic device is covered with clothing. One or more sensors, such as a skin sensor, a tension sensor, an infrared sensor, or microphones, can be used to execute the steps in the wearable electronic device.

Promoting intergenerational communication through location-based asynchronous video communication

Abstract: We describe the design and field evaluation of the Serendipitous Family Stories system, a web and mobile service that allows for videos to be saved in user-specified real-world locations, shared with friends and family, and then serendipitously discovered as those people approach the location of a story. Through a twenty-participant field evaluation, we discovered how this new form of location-based asynchronous communication can be used to strengthen family relationships by encouraging communication across generations and enhancing users' relationships with everyday places in their lives.

Design and Evaluation of Identifiable Key-Click Signals for Mobile Devices

Abstract: As touch based input becomes more popular in mobile devices, there is an increasing need for haptic feedback on key-less input surface. Four experiments were conducted to design and evaluate identifiable emulated key-click signals using a piezoelectric actuator. Experiments I and II assessed the information transmission capacity for the amplitude, frequency, and number of cycles of raised cosine waveforms used to drive the piezo actuators under fixed- and roving-background conditions, respectively. Experiment III estimated the total information transfer for all three parameters. The results were used to reduce the number of stimulus alternatives in the key-click signal set with the goal to achieve perfect identification performance. Experiment IV verified that up to 5 to 6 identifiable key-click signals could be achieved with the experimental setup. The present study outlines an information theoretic approach to conducting identification experiments to guide the design of and to evaluate a perfectly identifiable stimulus set. The methodology can be applied to other applications in need of perceptually identifiable stimulation patterns.

Methods and devices for determining user input location using acoustic sensing elements

Abstract: Methods and devices are provided for determining location of an input on a surface of a device using an acoustic sensing element. An exemplary method begins by determining an anticipated acoustic response resulting from an output generated by a component of the device at the acoustic sensing element. The method continues by subtracting the anticipated acoustic response from a measured acoustic response at the acoustic sensing element to obtain a nominal acoustic response, and determining the location of the input based on the nominal acoustic response.

System and methods for adaptive antenna optimization

Abstract: A method (600) and devices for enhancing the performance of one or more antennas (440) is provided. A control circuit (104) assesses performance of an antenna (101) in a plurality of bands, such as a receive band and a transmit band. The control circuit (104) then selects one of the bands, e.g., a lesser performing band, as a “selected band” for which the antenna (101) will be optimized. The control circuit (104) can then adjust an adjustable impedance matching circuit (103) coupled to the antenna (101) to improve the efficiency of the antenna (101) in the selected band and can adjust a resonance of the antenna (101) to further improve an efficiency of the antenna (101) in the selected band.

Idle State Interference Mitigation in Wireless Communication Network

Abstract: A method in a mobile station for ranking cells in order to perform reselection from a serving cell to a second cell is disclosed. The method includes detecting a second cell that the mobile station is not allowed to access, determining resources used for transmission of a signal of the second cell, and applying a reselection bias if the resources used for transmission of the signal of the second cell do not substantially overlap resources used for transmission of a signal of the serving cell.

Method and apparatus for providing user equipment access to tv white space resources by a broadband cellular network

Abstract: A broadband cellular network (BCN) provides a user equipment (UE) access to TVWS resources. The BCN authorizes the UE to access TVWS resources by conveying a mobile device identifier received from the UE, and a cell identifier associated with the UE's coverage area, to a Federal Communications Commission (FCC)-certified Database and receiving, from the Database, and storing an FCC ID associated with the UE and a set of available TVWS resources. The BCN then conveys, to the UE via a broadband cellular technology, a channel resource information element (CRIE) that includes the cell identifier and identifies the set of available TVWS resources. Subsequently, the BCN re-authorizes the UE to access TVWS resources based on the stored FCC ID and without re-conveying the mobile device identifier to the Database. The BCN further utilizes broadband cellular technology procedures to provide a “virtual” contact verification signal (VCVS) to the UE.

Method and apparatus for activating a function of an electronic device

Abstract: A method and apparatus for activating a function of the electronic device is disclosed herewith. The method includes detecting a first input by a motion sensor. Further, the method activates a touch sensor of the electronic device in response to detecting the first input. The method then detects a second input by the motion sensor within a predetermined time period from the first input. Next, the method determines, in response to detecting the second input, whether contact has occurred at the touch sensor and activates a function of the electronic device in response to determining that contact has occurred at the touch sensor when the second input is detected.

Method for facilitating access to a first access nework of a wireless communication system, wireless communication device, and wireless communication system

Abstract: A method for facilitating access to a first access network (110) of a wireless communication system (100) comprises authenticating (300) a wireless communication device (102) with a second access network (104) and generating temporary access credentials using access information provided by the second access network (104). The wireless communication device (102) then transforms (302) the temporary access credentials and an identifier of the first access network (110) to provide first transformed access credentials which are transmitted (304) for performing authentication with the first access network (110). The identifier of the first access network (110) is provided to the second access network (104) which generates (308) second transformed access credentials using the identifier of the first access network (110) and the temporary access credentials. Authentication is performed (310) with the first access network (110), which includes comparing the first transformed access credentials with the second transformed access credentials and allowing access to the first access network (110) when the first transformed access credentials and the second transformed access credentials are substantially the same. A wireless communication device, and a wireless communication system are also disclosed and claimed.

Reference sequence construction for fast cell search

Abstract: A method and apparatus for fast cell search based on a chirp reference signal transmission is disclosed herein. A primary synchronization channel (P-SCH) and two secondary synchronization channels (S-SCH1 and S-SCH2) will be utilized. S-SCH1 will comprise a reference sequence having a first index value and S-SCH2 will comprise a reference sequence having a second index value. S-SCH1 and S-SCH2 will be scrambled with a first and a second scrambling code, respectively. The second scrambling code will be based on the first index value.

Method and apparatus for robust heart rate sensing

Abstract: A heart rate sensing system ( 300 ) includes a light source ( 112, 310, 1008, 1110 ) a light detector ( 114, 1010, 1112 ) and a pressure sensor ( 116, 1012, 1114 ) held by a compressible comformable resilient pad ( 110, 1006, 1108 ) against a wearers body ( 202 ). A signal from the pressure sensor is used to alter the amplitude of a signal detected by the light source in order to reduce motion artifacts. The system can be incorporated into an article, such as an ear cuff ( 100 ), an audio headset ( 1000 ) or a set of headphones ( 1100 ), that is suitable for use by an active user.

Apparatus and method for communicating and processing a reference signal based on an identifier associated with a base station

Abstract: A wireless communication device receives at least a section of a subframe from a base station in a wireless communication system. The subframe includes transmission resources multiplexed onto subcarriers of orthogonal frequency division multiplexed (OFDM) symbols. A first set of OFDM symbols includes a reference signal and at least a second set of OFDM symbols includes information other than the reference signal (e.g., channel-coded data). The wireless device determines which OFDM symbols of the subframe constitute the first set of OFDM symbols based on an identifier associated with a base station that transmitted the subframe. The wireless device may then process the reference signal from the OFDM symbols that are determined to be the first set of OFDM symbols. The wireless device may also determine which OFDM symbols of the subframe constitute the second set of OFDM symbols and process non-reference signal information from OFDM symbols of the second set.