Qualcomm

About: Qualcomm is a company organization based out in Farnborough, United Kingdom. It is known for research contribution in the topics: Wireless & Signal. The organization has 19408 authors who have published 38405 publications receiving 804693 citations. The organization is also known as: Qualcomm Incorporated & Qualcomm, Inc..

A Portable FMCW Interferometry Radar With Programmable Low-IF Architecture for Localization, ISAR Imaging, and Vital Sign Tracking

Abstract: This paper presents a portable radar system for short-range localization, inverse synthetic aperture radar imaging, and vital sign tracking. The proposed sensor incorporates frequency-modulated continuous-wave (FMCW) and interferometry (Doppler) modes, which enable this radar system to obtain both absolute range information and tiny vital signs (i.e., respiration and heartbeat) of human targets. These two different operation modes can be switched through an on-board microcontroller. To simplify the system, the proposed radar utilizes the audio card of a laptop to sample the baseband signal. The FMCW mode of the radar uses operational-amplifier-based circuits to generate an analog sawtooth signal and a reference pulse sequence (RPS). The RPS is locked to the sawtooth signal to obtain coherence for the radar system. For the interferometry mode, a low-intermediate-frequency modulation method is implemented to avoid the slow vital signs from being distorted by the high-pass filter of the audio card. Several experiments were carried out to reveal the capability and distinct operational features of the proposed portable hybrid radar. The experiments also showed that the system can easily detect glass, which is usually difficult to identify for optical-based sensors. In addition, 2-D scanning in a complex environment revealed that the proposed radar was able to differentiate human targets from other objects. Moreover, ISAR images were used to isolate moving human targets from surrounding clutter. Finally, the proposed radar also demonstrated its ability to accurately measure vital signs when a human subject sits still.

Method and apparatus for the remote monitoring and configuration of electronic control systems

Abstract: A system for communication between a fleet of vehicles (12, 14) and a central base station (22), where each of the vehicles includes one or more vehicle subsystems (31A, 31B) connected to a vehicle data link (32), is disclosed herein. Within each vehicle (12), message packets generated by vehicle subsystems (31A, 31B) are placed upon the vehicle data link (32). Each message packet includes header information identifying a given vehicle and subsystem thereof. The message packets are transmitted from the fleet of vehicles (12, 14) to the central base station (22), and routed within the central base station (22) based on the header information. Control information and the like may also be transmitted by the central base station (22) for receipt by various vehicle subsystems (31A, 31B) within selected ones of the fleet vehicles (12, 14). Each message packet generated by the central base station (22) includes header information identifying at least a particular fleet vehicle (12) and vehicle subsystem (31A). This allows each message packet to be retrieved by the specified vehicle subsystem (31A) by way of the vehicle data link (32).

Capacity-achieving ensembles for the binary erasure channel with bounded complexity

Abstract: We present two sequences of ensembles of nonsystematic irregular repeat-accumulate (IRA) codes which asymptotically (as their block length tends to infinity) achieve capacity on the binary erasure channel (BEC) with bounded complexity per information bit This is in contrast to all previous constructions of capacity-achieving sequences of ensembles whose complexity grows at least like the log of the inverse of the gap (in rate) to capacity The new bounded complexity result is achieved by puncturing bits, and allowing in this way a sufficient number of state nodes in the Tanner graph representing the codes We derive an information-theoretic lower bound on the decoding complexity of randomly punctured codes on graphs The bound holds for every memoryless binary-input output-symmetric (MBIOS) channel and is refined for the binary erasure channel

Location based service (lbs) system and method for creating a social network

Abstract: A system and method for providing a location based service to create a social network, comprising activating a feature from a wireless terminal, registering from the wireless terminal with a location based service associated with the feature, creating a profile of a user of the feature, and displaying candidates based on the profile and based on the geographic location of the candidates. A Global Positioning System (GPS) may be used to geographically locate active users of a feature. An activity map may be associated with a feature, the activity map displaying active users of the feature.

Method and apparatus for handoff between different cellular communications systems

Abstract: A method and system for performing an intersystem handoff of communication with a mobile station between base stations of first and second cellular systems is disclosed herein. At the mobile station, a quantifiable parameter of a signal transmitted by a second base station of the second system is measured. When the measured value of the quantifiable parameter passes through a first predetermined level, the mobile station communicates a signal quality message via a first base station of the first system to a first mobile switching control station. A channel request message is then communicated from the first mobile switching control station to a second mobile switching control station within the second system. At the second base station, a quantifiable parameter of the signal received from the mobile station is also measured. The second base station establishes communication with the mobile station when the measured value of the quantifiable parameter passes through a predetermined level. Alternately, the signal strength of a first pilot signal transmitted by the first base station is measured at the mobile station. A handoff request message is then sent to the second base station when the measured signal strength of the first pilot signal becomes less than a second predetermined level, thereby mobile station communication to be established. The provision of a voice link between the mobile switching control stations allows for the forwarding of an existing connection between the first and second cellular systems, and enables the performance of soft intersystem handoffs.