Method for demodulating ACK slot signal of HS-DPCCH channel

Abstract

The present invention relates to an HS-DPCCH channel ACK time slot signal demodulation method, comprising: dividing the ACK time slot into one or two parts according to timing offset TimingOffset to estimate: SIR={(10-TimingOffset / 10)*SIR1+TimingOffset / 10*SIR2} / 10, SIR1 or SIR2=(square of the maximum correlation value between the ACK symbol of the part and corresponding channel decoding mode-interference signal code domain power / ACK symbol number of the part) / (interference signal code domain power*average channel estimated value power of the part); judging weather the ACK time slot is a effective feedback result or an upstream discontinuous sending DTX according to the SIR estimation and appointed threshold. The method is suitable for R6 and compatible with R5, and the offspring is considered, meanwhile adopting unbiased estimation to receive signal makes the SIR estimation more accurate and improves the ACK time slot decoding performance.

Description

technical field [0001] The invention relates to wideband code division multiple access WCDMA uplink signal demodulation, in particular to a WCDMA high-speed downlink packet access HS-DPCCH channel ACK time slot signal demodulation method of HSDPA. Background technique [0002] The HS-DPCCH channel is a channel used for downlink HS-PDSCH channel quality feedback and HARQ-ACK response in the WCDMA HSDPA system. Its channel structure is as follows: figure 1 As shown, the first time slot in each subframe of the HS-DPCCH channel is used for the HARQ-ACK response, referred to as the ACK time slot, which carries the UE's feedback on the demodulation result of the downlink HS-PDSCH channel, and is a high-speed downlink packet access It is an essential part of HSDPA hybrid automatic repeat request HARQ technology. When the HSDPA base station demodulates the ACK time slot of the HS-DPCCH channel, it needs to use the SIR estimation value of the ACK time slot to judge whether the ACK t...

AI Technical Summary

Problems solved by technology

[0006] At the same time, the existing SIR estimation method has a significant impact on the code domain power of the received signal is a biased estimate, and does not consider the timing offset between the HS-DPCCH channel and the uplink dedicated physical control DPCCH channel, such as image 3 As shown, when the timing offset is not 0, the ACK time slot of the HS-DPCCH channel overlaps with the two uplink DPCCH time slots. At this time, if the multipath numbers of the two DPCCH time slots are different, their The channel estimates are also different, and the existing methods do not consider the different channel estimates, which will cause a large deviation in the SIR estimation

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