Patent application number | Description | Published |
20080293362 | Method for Polarization Correction in User Equipment - A method and device for compensation of received signal components at a user equipment (UE) used for receiving signal components from a radio base station (RBS). The signal components have at least a first and a second polarization orientation, respectively. The intended reception of the signal component (Yh(n)) having the first polarization deviates from the polarization orientation of the transmitted signal component (Xh(n)) having the first polarization by a first angle (φ), and the intended reception of the signal component (Yv(n)) having the second polarization deviates from the polarization orientation of the transmitted signal component (xv(n)) having the second polarization by a second angle (β). The method comprises the steps: determining the correlation values (Ryw, Ryvy, Ry | 11-27-2008 |
20090309802 | RE-CONFIGURABLE ANTENNA AND A METHOD FOR ACQUIRING A CONFIGURATION OF A RE-CONFIGURABLE ANTENNA - The present invention relates to a method for acquiring a configuration of a re-configurable antenna, having at least two different antenna element configurations, where the antenna's element mutual coupling characteristics are known in advance in the form of an antenna coupling matrix (C | 12-17-2009 |
20100013710 | ARRAY ANTENNA ARRANGEMENT - The present invention relates to an array antenna arrangement comprising at least two antenna sub-arrays and at least one antenna element in each antenna sub-array. The array antenna arrangement is adapted for calculation of a total covariance matrix (R) of a received signal vector (x). The array antenna arrangement further comprises at least one switch, where the number of switches corresponds to the number of antenna elements in each antenna sub-array. Each switch is connected to a respective radio chain, and is arranged to connect the antenna elements of a respective corresponding antenna sub-array to the respective radio chain cyclically. At least one full switch cycle, comprising a set of received signals for each switch configuration, is carried out for a calculation of the total covariance matrix (R). The present invention also relates to a corresponding method. | 01-21-2010 |
20100066635 | MICROWAVE SPARSE ARRAY ANTENNA ARRANGEMENT - A microwave array antenna arrangement comprising at least two groups of antenna elements and at least two antenna elements in each group. All groups comprise an equal amount of antenna elements, where the arrangement further comprises one radio chain for each group of antenna elements. The arrangement also comprises one switch for each radio chain, the switches being arranged for cyclically connecting each radio chain to the antenna elements in each respective group of antenna elements. | 03-18-2010 |
20100074300 | METHOD FOR SIMPLIFYING THE CALCULATIONS FOR PRE-WHITENING IN A G-RAKE RECEIVER - A method for simplifying calculations for pre-whitening in a G-RAKE receiver, comprising receiving at least two signals with at least two antennas via a channel, where each one of said received signals comprises time delayed and attenuated versions of the original signals. Each received signal forms a corresponding vector of received signal versions and the vectors form a matrix of received signals, where, due to correlation between the antennas, the received signals are correlated. Each version also comprises a certain amount of colored noise. The correlating effect of the antennas is estimated and formulated in matrix form and used to acquire essentially uncorrelated received signal vectors in an essentially uncorrelated received signal matrix. A calculated inverse of a covariance matrix of the calculated essentially uncorrelated signal vectors is used to pre-whiten the noise. A G-RAKE receiver arranged for applying the method above. | 03-25-2010 |
20100215113 | Method and System for Pre-Coding For Frequency Selective Radio Communication Channel - A method for processing signals to be transmitted in a MIMO system from a transmitter having at least two transmitting antennas to a receiver having at least two receiving antennas on a frequency selective communication channel. The method comprises estimating elements of a channel matrix H(q | 08-26-2010 |
20110002414 | Method Of And A Device For Precoding Transmit Data Signals In A Wireless MIMO Communication System - A method of and a precoding device and a communication device for precoding transmit data signals in a wireless Multiple-Input Multiple-Output, MIMO, channel transmission scheme for maximizing channel capacity of the MIMO system given available amounts of transmit power. The precoding is expressed in a complex precoding matrix (W), which is calculated involving individual transmit power constraints of the multiple outputs ( | 01-06-2011 |
20110021163 | ANTENNA OPTIMIZATION - The present invention relates to a solution for efficient handling of radio resources in communication devices in a wireless communication network. In the solution a subset of available antennas to be used is chosen using a method for determining a singular valued metric from a sub matrix related to a full channel matrix. Sub-channel matrices are chosen by deducing the metric and comparing to other sub-matrices. Preferably the best sub-channel matrix is used to determine a suitable full channel matrix to use in communication and this full channel matrix is communicated to each involved communication device. | 01-27-2011 |
20110026626 | METHOD OF AND A RADIO TRANSMISSION SYSTEM AND RADIO ACCESS EQUIPMENT FOR CELLULAR WIRELESS RADIO TRANSMISSION - Radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based cellular wireless radio transmission system, wherein radio access equipment of the system connects to multiple geographically spread radio antennas of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment. Transmit timings for radio transmission between the user equipment and the antennas of the DAS are established. The radio transmission is scheduled based on the established transmit timings. | 02-03-2011 |
20110090981 | Method and Apparatus For Communication Site Planning - The present invention relates to a solution for determining wireless communication cell characteristics related to wireless MIMO transmission mode and dynamically selecting suitable communication transmission mode for certain parts of the wireless communication cell. The solution uses a flatness spectrum analysis of received impulse response from a plurality of measurement points in the cell using a plurality of antennas in a wireless network access gateway, e.g. a base station. | 04-21-2011 |
20110248889 | Device and a Method For Establishing Communication Between Nodes in a Wireless Communication System - The present invention relates to a first node ( | 10-13-2011 |
20120014467 | Method of and Equipment For Compensating Carrier Frequency Offset in an Orthogonal Frequency Division Multiplexing Wireless Radio Transmission System - For compensating carrier frequency generation in communication equipment for radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based wireless radio communication system, in which reference signals known communication equipment are transmitted in a regular time repetitive manner, carrier frequency generation is compensated ( | 01-19-2012 |
20120033683 | Method and Receiver For Jointly Decoding Received Communication Signals Using Maximum Likelihood Detection - The present invention relates to a method in a receiver for decoding at least two received communication signals, wherein the communication signals are modulated, pre-coded by a discrete Fourier transform and transmitted by means of single-carrier frequency division multiple access scheme (SC-FDMA). The method comprises the steps of: performing an antenna combining and equalization on a signal observed at the receiver; performing inverse discrete Fourier transform on a model of the observed signal; whitening a time domain model of the observed signal; and jointly detecting the received at least two communication signals by performing soft value calculations based on maximum likelihood detection of a whitened time domain model using a whitened time domain channel estimate. | 02-09-2012 |
20120219098 | CONTROLLABLE FILTER TO DIAGONALIZE A TRANSMISSION CHANNEL - The present invention relates to a node ( | 08-30-2012 |