Institution
Motorola
Company•Schaumburg, Illinois, United States•
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.
Papers published on a yearly basis
Papers
More filters
•
16 Feb 1994TL;DR: In this paper, a method and apparatus for encoding and decoding to facilitate coherent communication is provided, in which reference symbols are inserted into a stream of input data symbols to form a reference coded stream of data symbols.
Abstract: A method and apparatus is provided for encoding and decoding to facilitate coherent communication. In encoding, reference symbols are inserted into a stream of input data symbols (110) to form a reference coded stream of input data symbols (114). Subsequently, the reference coded stream of input data symbols are prepared for transmission over a communication channel by spreading the reference coded stream of input data symbols with a spreading code prior to transmission over the communication channel. In decoding, a received communication signal (120) is despread with a spreading code to derive a stream of reference samples (132) and a stream of data samples (138). The channel response is estimated by utilizing the stream of reference samples (132). Finally, an estimated data symbol is detected from the stream of data samples (138) by utilizing the estimated channel response.
134 citations
•
21 Dec 2005Abstract: A method and apparatus are provided for authenticating a first node M 220M in an ad hoc network 200. Node I 220I can receive a request from node M 220M to join the ad hoc network 200. This request includes, among other things, a biometric input associated with a first user of the node M 220M. Before the node M 220M is permitted to join the ad-hoc network, Node I 220I can authenticate the first user based on the biometric input by determining whether the biometric input matches biometric codes stored in Node I 220I.
134 citations
•
29 Jul 2003TL;DR: In this article, a handoff from a first Internet Protocol (IP) connection to a second IP connection for a time critical communication is disclosed, which includes communicating (905) between a first wireless station ( 219) and a second station (331) using the first IP connection and a first IP address (223) for the first WSN for the wireless station, setting up (907) the second IP connections with a second WSN and determining (915) that the second connection should be the primary connection.
Abstract: A method (900) of and wireless communications unit (800) for effecting a handoff from a first Internet Protocol (IP) connection(221) to a second IP connection (331) for a time critical communication is disclosed. The method includes communicating (905) between a first wireless station ( 219) and a second station (331) using the first IP connection and a first IP address (223) for the first wireless station; setting up (907) the second IP connection with a second IP address for the first wireless station, the first IP connection being a primary connection and the second IP connection being a secondary connection; determining (915) that the second IP connection should be the primary connection; and changing (917) the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages.
134 citations
••
TL;DR: It is demonstrated that significant increases in system capacity are possible using DSA in the indoor situations that were tested and suggested that dynamic slot allocation is possible at the frequency considered, provided turnaround times are in the low-to-mid tens of milliseconds.
Abstract: We introduce and study the use of dynamic slot allocation (DSA) in packet-switched space-division-multiple-access (SDMA) systems. In conventional SDMA, a smart antenna is used at the basestation to simultaneously communicate with multiple stations on the same frequency channel. When dynamic slot allocation is added, the basestation uses uplink channel measurements to intelligently construct future SDMA/TDMA frames. It is shown that under a simple minimum signal-to-interference-plus-noise ratio (SINR) constraint, the problem of performing optimal dynamic slot allocation is NP-complete. Heuristic slot allocation algorithms are introduced which are capable of greatly increasing SDMA/TDMA frame capacity compared with a random allocation of stations. The paper uses both theoretical results and measured data from an experimental testbed to characterize the performance of dynamic slot allocation. The experimental system operates at a carrier frequency of 1.86 GHz and uses an eight-element circular antenna array. It is demonstrated that significant increases in system capacity are possible using DSA in the indoor situations that were tested. Dynamic slot allocation requires the channel to be essentially constant from the time that channel measurements are made until the SDMA/TDMA frame is transmitted. We also present channel measurements which show the effects of channel time coherence in the presence of indoor pedestrian movement. This and other results we have taken suggest that dynamic slot allocation is possible at the frequency considered, provided turnaround times are in the low-to-mid tens of milliseconds.
134 citations
•
05 Jul 1991TL;DR: A distributed polishing head assembly as discussed by the authors has a flexible membrane and a plurality of periodic polishing pads that are attached to the flexible membrane, and the polishing pad is made from a flat semiconductor wafer that has been sawed into small pieces.
Abstract: A distributed polishing head assembly (17) has a flexible membrane (14), and a plurality of periodic polishing pads (12) that are attached to the flexible membrane (14). The polishing pads (12) are made from a flat semiconductor wafer that has been sawed into small pieces. The polishing head is rubbed against a semiconductor wafer (10) in order to planarize the wafer (10).
134 citations
Authors
Showing all 27298 results
Name | H-index | Papers | Citations |
---|---|---|---|
Georgios B. Giannakis | 137 | 1321 | 73517 |
Yonggang Huang | 136 | 797 | 69290 |
Chenming Hu | 119 | 1296 | 57264 |
Theodore S. Rappaport | 112 | 490 | 68853 |
Chang Ming Li | 97 | 896 | 42888 |
John Kim | 90 | 406 | 41986 |
James W. Hicks | 89 | 406 | 51636 |
David Blaauw | 87 | 750 | 29855 |
Mark Harman | 83 | 506 | 29118 |
Philippe Renaud | 77 | 773 | 26868 |
Aggelos K. Katsaggelos | 76 | 946 | 26196 |
Min Zhao | 71 | 547 | 24549 |
Weidong Shi | 70 | 528 | 16368 |
David Pearce | 70 | 342 | 25680 |
Douglas L. Jones | 70 | 512 | 21596 |