Abstract: An effective SINR mapping based approach can be used to average the MI or RBIR values corresponding to narrowband SINR values in frequency between the resource blocks of the E-UTRA grid structure and then to estimate the downlink radio link quality from the averaged mutual information domain value by mapping it back to wideband SINR value covering the whole or partial E-UTRA system bandwidth. This wideband SINR value can then be further averaged in time and used as a downlink radio link quality estimate for E-UTRA radio link monitoring. Mutual information based effective SINR mapping is one example of an effective SINR mapping based approach.

Abstract: An effective SINR mapping based approach can be used to average the MI or RBIR values corresponding to narrowband SINR values in frequency between the resource blocks of the E-UTRA grid structure and then to estimate the downlink radio link quality from the averaged mutual information domain value by mapping it back to wideband SINR value covering the whole or partial E-UTRA system bandwidth. This wideband SINR value can then be further averaged in time and used as a downlink radio link quality estimate for E-UTRA radio link monitoring. Mutual information based effective SINR mapping is one example of an effective SINR mapping based approach.

Abstract: A method for compensating the bias in estimates by utilizing the configured channel estimation filter bank. The method comprises selecting a filter from a predefined set of filters based on channel parameters, and producing at least one radio channel coefficient by applying the selected filter. An input to the filter comprises raw channel estimates, and an output of the filter comprises at least one biased channel coefficient after filtering. The method further comprises producing a radio link quality based on the at least one biased channel coefficient and/or the selected filter. During the estimation, the method comprises removing bias based on the selected filter and/or a filter configuration.

Abstract: A method for compensating the bias in estimates by utilizing the configured channel estimation filter bank. The method comprises selecting a filter from a predefined set of filters based on channel parameters, and producing at least one radio channel coefficient by applying the selected filter. An input to the filter comprises raw channel estimates, and an output of the filter comprises at least one biased channel coefficient after filtering. The method further comprises producing a radio link quality based on the at least one biased channel coefficient and/or the selected filter. During the estimation, the method comprises removing bias based on the selected filter and/or a filter configuration.

Abstract: A method, apparatus, and computer program for estimating a rank, i.e. the number of uncorrelated spatial channels, of a radio channel are provided. The rank estimation is carried out by examining mutual proportions of a first eigenvalue and a second eigenvalue of a two-by-two channel matrix representation with a test function including elements of a solution of roots of a quadratic characteristic equation of the two-by-two channel matrix representation, wherein the test function comprises a discriminant of the solution of the roots of the quadratic characteristic equation without a square root operation.

Abstract: A receiving method and a receiver of a telecommunication system are provided. The receiver comprises one or more antennas, a radio frequency unit connected to the antennas for receiving signals transmitted by one or more transmitters using a multitude of channels, and an estimator. The estimator is configured to select one or more channel pairs, each channel of each channel pair being a given distance from each other, determine symbol estimates for the signals of the channels of the channel pairs, remove the effect of data modulation from the signals of the channels of the channel pairs, obtain noise estimates by subtracting the signals of the channels of the channel pairs from each other, and determine a noise covariance matrix for the desired channel on the basis of the obtained noise estimates.

Abstract: A method, apparatus, and computer program for estimating a rank, i.e. the number of uncorrelated spatial channels, of a radio channel are provided. The rank estimation is carried out by examining mutual proportions of a first eigenvalue and a second eigenvalue of a two-by-two channel matrix representation with a test function including elements of a solution of roots of a quadratic characteristic equation of the two-by-two channel matrix representation, wherein the test function comprises a discriminant of the solution of the roots of the quadratic characteristic equation without a square root operation.

Abstract: An apparatus, including a detection unit configured to perform a non-linear detection on a receive signal, a first estimator configured to estimate a first quality measure based on the receive signal, and a second estimator configured to estimate a second quality measure dependent on the first quality measure and a performance measure of the detection unit is provided.

Abstract: An apparatus including a data processing entity configured to estimate at least one group quality value of a first set of at least one group of sub-carriers and to estimate the at least one group quality value of a second set of at least one group of sub-carriers, wherein the second set is selected from the first set dependent on the estimates of the at least one group quality value of the first set.

Abstract: A method and an apparatus for channel estimation are provided. The apparatus comprises: a synchronization unit configured to time-synchronize with a received signal on the basis of one or more synchronization patterns of the received signal; a searcher configured to search for pilot sequences of the received signal; an estimator configured to perform channel estimation on the basis of the pilot sequences and one or more synchronization patterns, and a decoder configured to decode cell information from the received signal.

Abstract: A receiving method and a receiver of a telecommunication system are provided. The receiver comprises one or more antennas, a radio frequency unit connected to the antennas for receiving signals transmitted by one or more transmitters using a multitude of channels, and an estimator. The estimator is configured to select one or more channel pairs, each channel of each channel pair being a given distance from each other, determine symbol estimates for the signals of the channels of the channel pairs, remove the effect of data modulation from the signals of the channels of the channel pairs, obtain noise estimates by subtracting the signals of the channels of the channel pairs from each other, and determine a noise covariance matrix for the desired channel on the basis of the obtained noise estimates.