Abstract:
PROBLEM TO BE SOLVED: To provide adequately accurate channel estimate for use with a decision feedback equalizer (DFE).SOLUTION: A channel estimator is configured to determine channel estimate parameters indicative of characteristics of a wireless communication channel on the basis of a received signal comprising a known transmitted signal and a noise signal. The channel estimator is configured to apply, to the received signal, a frequency domain representation inverse of a combination of a known signal factor as a function of frequency and a noise factor.
Abstract:
PROBLEM TO BE SOLVED: To provide a system and a method for acquiring signal acquisition auxiliary data.SOLUTION: The signal acquisition auxiliary data is acquired for a receiving device like a radio location place-supported position determination device which retrieves a signal from an arbitrary source like a satellite body and a base station. The data can be acquired from data acquired before based upon evaluation of change in parameter like time and position which possibly exerts a bad influence on validity. In some case, the data can be adjusted for the change in parameter. When acquisition auxiliary data provided by, especially, a remote entity includes a more distinct parameter than a generally provided one, data which is made more accurate can be calculated by a receiver using a partial measured value of a signal set. As long as a movement of a mobile station which cannot be corrected is detected and validity of previous data is kept, new data need not be acquired until the validity of the previous data expires because of a limit of extrapolation of time using a Doppler coefficient.
Abstract:
PROBLEM TO BE SOLVED: To provide global navigation satellite systems which can determine a position location for a mobile station based on satellite signals transmitted from two or more satellite systems.SOLUTION: Each of first and second navigation satellite systems (NSS) is suitable for operating, respectively, by first and second specifications. Each of a plurality of first and second SVs is adapted to be identified, respectively, by a plurality of first and second unique corresponding identifiers (ID). A processor is suitable for receiving and identifying a plurality of first communication signals to be transmitted from the plurality of first SVs according to the plurality of first unique corresponding IDs, and is adapted to receive and identify the plurality of second communication signals to be transmitted from the plurality of second SVs according to the plurality of second unique corresponding IDs. The processor is adapted to determine position location information according to reception and identification of the plurality of first communication signals and the plurality of second communication signals.
Abstract:
PROBLEM TO BE SOLVED: To predict future GPS signal navigation data.SOLUTION: An apparatus includes: a processor capable of determining whether a subframe is an almanac subframe which sets a timehead, adds it to a TOW, sets a TLM message based on a value of the TOW, and generates a CRC for a predicted subframe; and a memory for storing the predicted subframe. The memory varies in size based on the number of the predicted subframes. The processor is further capable of calculating a position of the predicted subframe in the memory, setting a valid flag, and determining whether the value of the TOW is less than the number of seconds in a week.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for data and pilot structure supporting equalization. SOLUTION: Guard intervals are appended so that each data block has a guard interval at the beginning of the data block and a guard interval at the end of the data block. A pilot is appended to each aggregation in at least one data block. The data blocks, pilot, and guard intervals may be sent using various slot structures and are processed for transmission. Processing may include mapping the data blocks to at least one physical channel, channelizing the data blocks for each physical channel by using a channelization code, combining all physical channels, and scrambling the combined data, pilot, and guard intervals by using a scrambling code. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and device for mobile station hashing to a frequency of communication system. SOLUTION: Two-level hashing is used in which a mobile station is assigned to a frequency band and then assigned to a specific frequency within the frequency band. In one embodiment, a weight is assigned to a frequency, and the mobile station can be hashed to the weighted frequency. Weighting allows a non-uniform distribution of mobile stations in a frequency for optimizing system operation parameters. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a system and method for shortening the time needed to fix the position of an integrated GPS/wireless terminal unit in acquiring GPS satellite signals from the GPS satellite constellation. SOLUTION: The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine a duplexing configuration (e.g., frequency division duplexing (FDD) or time division duplexing (TDD)) of a carrier based on one or more synchronization signals. The UE may then receive a master information block (MIB) on the carrier, and may interpret one or more fields of the MIB based on the duplexing configuration of the carrier. The configuration dependent fields may include a special subframe field, a system information location field, or both. In some cases, such as in a TDD configuration, the UE may postulate a special subframe configuration of the carrier in order to receive the MIB, and may update the postulated special subframe configuration after receiving the MIB.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a location of a reference subframe based on an A-CSI report uplink subframe, an A-CSI request downlink subframe, a reference delay, and a report delay. In an aspect, the reference delay is a first delay value before the A-CSI report uplink subframe, and the report delay is a second delay value between the A-CSI request downlink subframe and the A-CSI report uplink subframe. The apparatus determines a type of the reference subframe based on the location of the reference subframe and a subframe configuration, the type of the reference subframe being a flexible subframe or a fixed subframe. The apparatus measures at least one of a channel or interference based on the reference subframe and the type of the reference subframe. The apparatus sends, at the A-CSI report uplink subframe, an A-CSI report based on the at least one of the channel or the interference.
Abstract:
Methods, systems, and devices are described for initial power level selection on a physical random access channel in a wireless communications network. Initial power level selection may account for, or be based on, one or more channel conditions associated with the physical random access channel. Initial power level selection may be based on signaling of available initial power transmission levels and a reference signal received power measurement. The described features may be implemented as coverage enhancement techniques, for example, for machine-type communication (MTC).