Patent application number | Description | Published |
20080291981 | Method and Apparatus for Removing Pilot Channel Amplitude Dependencies from RAKE Receiver Output - A receiver utilizes pilot channel propagation channel estimates and a signal-to-interference metric derived from the pilot channel to form combining weights for use in obtaining soft symbols from a desired channel for subsequent decoding. The soft symbols thus obtained are substantially independent of the pilot channel amplitude. | 11-27-2008 |
20090153375 | ADJUSTING SOFT VALUES TO REDUCE BIAS - A method is described for adjusting soft values in a code block prior to decoding. A count of saturated soft values in a code block is determined and one or more of the soft values in the code block are adjusted based on the count of saturated soft values. The count may be determined by incrementing the count for each positive saturated soft value and decrementing the count of each negative saturated soft value. The soft values may be adjusted by adding an offset computed based on the count to the soft values. | 06-18-2009 |
20090304132 | Method and Apparatus for Efficient Estimation of Interference in a Wireless Receiver - Methods and apparatus for determining an impairment covariance matrix for use in an interference-suppressing CDMA receiver are disclosed. In several of the disclosed embodiments, precise information regarding signal propagation delays is not needed. An exemplary method includes the selection of a plurality of processing delays for processing a received CDMA signal. Net channel coefficients for the processing delays are estimated and used to calculate an impairment covariance matrix. The impairment covariance matrix is calculated as a function of the estimated net channel coefficients and the processing delays, without estimating a propagation medium channel response for the received signal. | 12-10-2009 |
20100215075 | Estimating the Ratio of Traffic Channel Power to Pilot Power in a MIMO Wireless Communication System - Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level. | 08-26-2010 |
20110150059 | Decision Boundary Estimation for MIMO Wireless Receivers - In a wireless receiver, an estimated decision boundary for use in detecting symbol values from one group of combined received symbols is calculated based on a estimated traffic-to-pilot channel scaling ratio or an estimated decision boundary corresponding to another group of combined received symbols. By properly combining the information derived from the latter group of combined received symbols with channel estimation information for the former group, a decision boundary estimate for the former group can be obtained without the use of amplitude or power information for the latter group of symbols. | 06-23-2011 |
20130294276 | ESTIMATION OF CHANNEL QUALITY INDICATOR USING UNUSED CODES - Methods, a user equipment and a radio network node relating to estimation of a channel quality indicator, CQI, are provided. Downlink channels of a radio communication system are associated to a plurality of codes for code division multiplexing. Each downlink channel is associated to a respective code of said plurality of codes. The radio network node obtains information about an unused code among said plurality of codes. The user equipment obtains information about the unused code. The user equipment receives a downlink transmission from the radio network node. The user equipment estimates the CQI based on the unused code, wherein the unused code is unused with respect to the received downlink transmission. | 11-07-2013 |
20130315089 | ESTIMATION OF CHANNEL QUALITY INDICATOR USING ADDITIONAL REFERENCE SIGNALS - Methods, a user equipment and a radio network node relating to estimation of a channel quality indicator, CQI, are provided. A first reference signal is carried by a downlink channel of a radio communication system. The user equipment receives from the radio network node information about scheduling of a downlink transmission to the user equipment and information about a second reference signal being different from the first reference signal. Furthermore, the user equipment receives from the radio network node the downlink transmission. The downlink transmission comprises the first reference signal and the second reference signal. Next, the user equipment estimates the CQI based on the first reference signal and the second reference signal. | 11-28-2013 |
20140301510 | Method of Channel Cancellation, Radio Receiver, Cellular Communication Device and Computer Program - A method of channel cancellation for a cellular communication device is disclosed. The method comprises receiving ( | 10-09-2014 |
20150029970 | Redundancy Version Selection Based on Receiving Quality and Transport Format - The embodiments herein relate to a method in a base station ( | 01-29-2015 |