Abstract: A receiver is configured to perform symbol detection based on a total frequency domain received signal that comprises contribution from a block of time domain symbols. The receiver comprises electronic circuitry operate to divide the block into plural sub-blocks, and for each sub-block, to jointly detect the symbols of the sub-block while treating symbols of the block which are outside of the sub-block as noise.
Abstract: A method of grouping cells of a radio communications network may include defining first and second groups of cells from a plurality of cells that transmit reference signals for positioning measurements. The first and second groups of cells may be defined according to a characteristic of the reference signals transmitted by the respective cells and/or of the respective cells that transmit the reference signals. Reference signals used for positioning measurements from the cells of the first group may be measured at a positioning target device. Reference signals used for positioning measurements from the cells of the second group may be measured at the positioning target device separately in time and/or separately in frequency from measuring the reference signals from the cells (103) of the first group.
Abstract: Embodiments of the present invention described herein include a Mobile Management Entity and a method that receive a handoff request for an active voice session of a terminal which is leaving an E-UTRAN to a GERAN/UTRAN and then determine if the handoff request is applicable to a SRVCC procedure or a CSoLTEvGAN procedure.
Abstract: A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces. Here, the UE monitors a UE-specific search space, among the search spaces. The UE-specific search space is given based on a modulus operation using the variable of Yk for the subframe k and a variable C for the subframe k, wherein Yk is defined by: Yk=(A*Yk?1+B) mod D, the variable C is determined based on the number of CCEs (NCCE) divided by the aggregation level (L), and A, B and D are predetermined constant values predetermined regardless of the aggregation levels (L).
Type:
Grant
Filed:
August 20, 2012
Date of Patent:
May 6, 2014
Assignee:
Optis Cellular Technology, LLC
Inventors:
Dae Won Lee, Ki Jun Kim, Dong Wook Roh, Yu Jin Noh, Joon Kui Ahn, Jung Hoon Lee
Abstract: Methods and apparatus for selecting component carriers for random access attempts. A user equipment arranged to communicate with the base station over multiple component carriers, selects a component carrier from the multiple component carriers, based on a likelihood, and transmits a random access attempt to the base station over the selected component carrier. After maintaining statistics of component carriers selected for random access attempts per component carrier of the multiple component carriers, the user equipment adjusts the likelihood of selecting a specific component carrier for a subsequent transmission of a random access attempt based on the maintained statistics.
Type:
Grant
Filed:
March 11, 2010
Date of Patent:
May 6, 2014
Assignee:
Optis Cellular Technology, LLC
Inventors:
Robert Baldemair, Mats Sågfors, Magnus Stattin
Abstract: A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling.
Abstract: The present invention relates to a transmitter and to a receiver and methods thereof wherein the PAPR is reduced by applying a set of different phase rotations to the output of each DFT of the transmitter. A corresponding set of inverse phase rotations are applied to the input of the IDFT of the receiver. The set of phase rotations applied to the subcarriers at the output of the DFT precoder of the transmitter results in a circular time shift of the corresponding time domain at the output of the IDFT modulator. If the phase rotations are properly selected for each DFT precoder, the probability that signal peaks sum in a constructive way at the output of the IDFT modulators is reduced, with a consequent reduction of the PAPR.