Equalizing Device, Equalizing Method And Receiving Device

[0035] First, the principle of the present invention will be explained. In Embodiment 1, the premise is that the noise included in the correlation sequence (correlation result) c showing the correlation between the received signal received by the equalizer and the known signal provided (generated) by the equalizer The noise W based on the correlation with the valid data of the received signal within data , and the noise W based on the correlation with Gaussian noise noise is sufficiently suppressed by the smoothing process described using Equation 2 above. In this case, the matrix expression showing the relationship between the correlation sequence c and the delay profile h that is the channel estimation result is the following equation 3, where the correlation sequence c shows the difference between the received signal received by the equalizer and the delay profile h provided by the equalizer. Correlations between known signals.

[0036] c=Wh (Formula 3)

[0037] Formula 3

[0063] According to Embodiment 1, even in an environment where there are many small incoming waves, it is possible to estimate the transmission path characteristics with high accuracy, but it is necessary to perform an autocorrelation noise suppressing unit 14 to perform M×1 The column vector of , multiplied by the pre-computed M×M inverse matrix G －1 , so the calculation amount is relatively large. Therefore, in Embodiment 2, an equalization device 2 capable of improving the accuracy of channel estimation and reducing the amount of calculation as in Embodiment 1 will be described.

[0064] Figure 8 It is a block diagram schematically showing the configuration of the equalizer 2 according to the second embodiment. Figure 8 in, for Figure 7 The structural elements shown are the same as or corresponding to the structural elements, marked with Figure 7 The numbers shown are the same as those shown. Such as Figure 8 As shown, in the equalizer 2 of the second embodiment, th

[0083] Hereinafter, an equalization method according to Embodiment 3 will be described. Figure 10 It is a flowchart showing the equalization method of Embodiment 3. The equalization method of Embodiment 3 corresponds to the processing performed by the equalization device 1 of Embodiment 1. Therefore, in Embodiment 3, Embodiment 1 and the diagrams used in the description of Embodiment 1 are also referred to. The equalization method according to Embodiment 3 is, for example, an equalization method for correcting distortion of a received signal R0 in which a transmission unit is a transmission symbol composed of effective data including information to be transmitted and a known signal. This equalization method has: a known signal providing step ST1 which provides a known signal pn[k]; and a correlation calculation step ST2 which generates a correlation sequence c showing the difference between the received signal R0 and the provided known signal relevance. The equalization metho