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.

Bulletin board resource for communication system access

Abstract: A bulletin board communication resource (206) provides a message to communication units (104) regarding available communication systems (101, 102, and 103) in a particular geographic area. The bulletin board resource also supports registration of the communication unit with one or more of these systems as selected by the communication unit.

Dynamic random access memory

Abstract: A DRAM is operated based upon an external clock input, a column enable, and a row enable. The DRAM is accessed and row and column addresses are latched into buffers based upon the clock input.

Method for capping copper in semiconductor devices

Abstract: A silicon nitride layer (34) has improved adhesion to underlying copper interconnect members (30) through the incorporation of an intervening copper silicide layer (32). Layer (32) is formed in-situ with a plasma enhanced chemical vapor deposition (PECVD) process for depositing silicon nitride layer (34). To form layer (32), a semiconductor substrate (12) is provided having a desired copper pattern formed thereon. The copper pattern may include copper interconnects, copper plugs, or other copper members. The substrate is placed into a PECVD reaction chamber. Silane is introduced into the reaction chamber in the absence of a plasma to form a copper silicide layer on any exposed copper surfaces. After a silicide layer of a sufficient thickness (for example, 10 to 100 angstroms) is formed, PECVD silicon nitride is deposited. The copper silicide layer improves adhesion, such that silicon nitride layer is less prone to peeling away from underlying copper members.

Interference control, sinr optimization and signaling enhancements to improve the performance of otdoa measurements

Abstract: A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals The wireless terminal can perform OTDOA measurements subsequent to the reception of the command on a carrier frequency different from the serving cell carrier frequency A base station transmitter can jointly schedule a reference signal transmission from a plurality of base station transmitters for the purpose of OTD estimation enhancement, and transmit identical reference signals from the plurality of base station transmitters, the reference signals being identical both in the signal sequence and time-frequency resources used for transmission

Method and apparatus in a two-way wireless communication system for location-based message transmission

Abstract: A table (328) is created (402) for mapping, for ones of a plurality of portable subscriber units (122), a plurality of message types to a corresponding plurality of locations A message matching one of the plurality of message types is then received (404) by a controller (112), the message intended for a portable subscriber unit In response, the controller and the portable subscriber unit cooperate to determine (406) the location of the portable subscriber unit The controller sends (428) the message to the portable subscriber unit when the location matches one of the plurality of locations corresponding to the one of the plurality of message types