Abstract: The invention relates methods for triggering channel quality feedback for at least one of plural component carriers of a communication system available for downlink transmission. The invention suggests a mechanism for triggering channel quality feedback from a terminal where the downlink control signaling overhead for the selection of component carrier(s) to be reported on is minimized. One aspect of the invention is a new interpretation of a predetermined format for dedicated control information comprising a CQI request flag, which is depending on the status of the CQI request flag. In case the CQI request flag is set at least one further bit of the dedicated control information is interpreted as information indicative of the one or more component carriers available for downlink transmission to the terminal and the terminal is providing channel quality feedback on the channel quality experienced on the indicated component carrier or component carriers.

Abstract: A rate matching apparatus is capable of improving the bit error rate characteristic at a data receiving end. A rate matching part (106), which serves as a rate matching apparatus, generates, from a first encoded block corresponding to N symbols (where N is an integer equal to or greater than one), a second encoded block corresponding to N+K symbols (where K is an integer equal to or greater than one). In the rate matching part (106), a to-be-divided bit-group extracting part (122) extracts, from the first encoded block, a first bit group corresponding to any of the N symbols. A dividing part (124) divides the extracted first bit group into L divided bit groups corresponding to L symbols (where L is an integer equal to or greater than two but equal to or smaller than K+1), thereby providing the second encoded block.

Abstract: A rate matching apparatus is capable of improving the bit error rate characteristic at a data receiving end. A rate matching part (106), which serves as a rate matching apparatus, generates, from a first encoded block corresponding to N symbols (where N is an integer equal to or greater than one), a second encoded block corresponding to N+K symbols (where K is an integer equal to or greater than one). In the rate matching part (106), a to-be-divided bit-group extracting part (122) extracts, from the first encoded block, a first bit group corresponding to any of the N symbols. A dividing part (124) divides the extracted first bit group into L divided bit groups corresponding to L symbols (where L is an integer equal to or greater than two but equal to or smaller than K+1), thereby providing the second encoded block.

Abstract: A radio transmitting apparatus and the like for improving the reception error rate characteristic. In this apparatus, a data modulating part (121) modulates a data signal to provide a modulated symbol. A Q-inverting part (125) generates a symbol that corresponds to the modulated symbol provided by the data modulating part (121) and that, when combined with the modulated symbol, becomes a signal having a particular value. A multiplexing part (110) multiplexes the modulated symbol provided by the data modulating part (121) with the corresponding symbol generated by the Q-inverting part (125) to provide a multiplexed signal.