Information detection method and apparatus for high speed downlink shared control channel

An information detection apparatus for a High Speed Downlink Shared Control Channel (HS-SCCH), comprising:

• a rate de-matching unit used for rate de-matching the front detection signal of a first part control information of each HS-SCCH in an HS-SCCH monitor set, obtaining a piece of rate de-matched information of each HS-SCCH monitor channel and outputting the rate de-matched information to a user mask removing unit;
• the user mask removing unit used for removing a user mask for each rate de-matched information and outputting the processed information to a decoder and a calculation unit;
• the decoder used for Viterbi decoding each rate de-matched information of which the user mask is removed, obtaining Viterbi-decoding 0 state accumulated metric corresponding to the front detection signal of each HS-SCCH monitor channel and outputting the Viterbi-decoding 0 state accumulated metric to a determination variable acquisition unit;
• the calculation unit used for summing an absolute value of the soft information of each HS-SCCH information respectively, with the absolute value of the soft information being obtained by removing the user mask, and then outputting the sum to the determination variable acquisition unit;
• the determination variable acquisition unit used for obtaining determination variables of each HS-SCCH, according to the Viterbi 0 state accumulated metric corresponding to the front detection signal of each HS-SCCH and the sum of absolute values of the corresponding soft information, and outputting the determination variables to a detection unit;
• the detection unit used for selecting a maximum from the obtained determination variables of HS-SCCH, comparing the maximum with the preset threshold, and determining whether the HS-SCCH of this user is detected.