Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Antenna tuning on an impedance trajectory

Abstract: A method, transceiver integrated circuit (IC), and communications device for generating antenna tuning states derived from a pre-established trajectory of tuning states to adjust a detected signal level towards a preset, given value. A tuning state generation (TSG) controller determines whether a detected signal level matches a given value. If the detected signal level does not match the given value, the TSG controller selects an initial preset tuning state from a pre-established trajectory corresponding to a pre-identified operating condition that best matches a current operating condition. The TSG logic forwards the initial preset tuning state to the antenna tuner to trigger impedance transformation. Following generation of the initial preset tuning state, the controller receives an updated detected signal level. If the updated detected signal level fails to match the given value, the controller generates an incremental tuning state that is interpolated between the initial and a final preset tuning states.

Programmable wireless electrode system for medical monitoring

Abstract: A wireless, programmable system for bio-potential signal acquisition (e.g., electrocardiogram (ECG) data) includes a base unit and a plurality of individual wireless, remotely programmable transceivers that connect to patch electrodes. The base unit manages the transceivers by issuing registration, configuration, data acquisition, and transmission commands using wireless techniques. Bio-potential signals from the wireless transceivers are demultiplexed and supplied via a standard interface to a conventional monitor for display.

Incremental redundancy hybrid ARQ schemes based on low-density parity-check codes

Abstract: We study the throughput of hybrid automatic retransmission request (H-ARQ) schemes based on incremental redundancy (IR) over a block-fading channel. We provide an information-theoretic analysis assuming binary random coding and typical-set decoding. Then, we study the performance of low-density parity-check (LDPC) code ensembles with iterative belief-propagation decoding, and show that, under the hypothesis of infinite-length codes, LDPCs yield almost optimal performance. Unfortunately, standard finite-length LDPC ensembles incur a considerable performance loss with respect to their infinite-length counterpart, because of their poor frame-error rate (FER) performance. In order to recover part of this loss, we propose two simple yet effective methods: using a modified LDPC ensemble designed to improve the FER; and using an outer selective-repeat protocol acting on smaller packets of information bits. Surprisingly, these apparently very different methods yield almost the same performance gain and recover a considerable fraction of the optimal throughput, thus making practical finite-length LDPC codes very attractive for data wireless communications based on IR H-ARQ schemes.

Anchoring method for flow formed integrated circuit covers

Abstract: A flow formed encapsulated integrated circuit package (100) includes a printed circuit substrate (160) having upper and lower opposed surfaces and one or more anchor holes (150) The one or more anchor holes (150) have an upper aperture in the upper surface and a lower aperture in the lower surface One or more integrated circuit die (130) are electrically and mechanically attached to the upper surface of the substrate (160) In addition, a solder resist mask (190) is attached to the lower surface of the substrate which covers the aperture of the one or more anchor holes (150) Flow formed material (110) is formed around the integrated circuit die (130) so as to encapsulate the one or more integrated circuits (150), the flow formed material (110) covering at a least a portion of the upper surface of the printed circuit substrate (160) and extending substantially into the anchor hole (150)

Transponding tag and method

Abstract: A transponding tag (14) and method for responding with a unique code signal (18) when it receives an interrogation signal (16) The tag (14) waits a random duration before responding to avoid interference with response code signals (18) from other tags (14) The tag (14) includes two antennae (22, 24) formed on opposing sides of a dielectric planar substrate (20) A protective coating (52) and printed indicia (72) overlie the antennae An electrical circuit (34), decoupling capacitor (44) and inductive pickup coil (46) are embedded within the substrate (20) The electrical circuit (34) and capacitor (44) reside between the antennae (22, 24) to receive RF shielding from the antennae and to reduce thickness of the tag (14) A capacitance exists between the antennae (22, 24) This capacitance stores DC electrical energy for the electrical circuit (34) The tag (14) is programmed through a modulated magnetic field detected at the inductive pickup coil (46)