초록 ▼

A method for estimating memory-enabled transmission channels, having the following steps: determining a first estimation ĥ of the pulse response of the transmission channel; estimating the additive interferences of the transmission channel; and correcting the first channel estimation while taki

A method for estimating memory-enabled transmission channels, having the following steps: determining a first estimation ĥ of the pulse response of the transmission channel; estimating the additive interferences of the transmission channel; and correcting the first channel estimation while taking into consideration the estimation of the additive interferences. The first channel estimation is performed using a matched filter or a least squares estimation.

대표청구항 ▼

The invention claimed is: 1. A method for estimating a memory-enabled transmission channel, comprising the steps of: determining a first estimation ĥ of a pulse response of the memory-enabled transmission channel; performing an estimation of an intensity level σ2 of an additive interferen

The invention claimed is: 1. A method for estimating a memory-enabled transmission channel, comprising the steps of: determining a first estimation ĥ of a pulse response of the memory-enabled transmission channel; performing an estimation of an intensity level σ2 of an additive interference of the memory-enabled transmission channel; and performing a correction of the first estimation of the pulse response by taking into consideration the estimation of the intensity level σ2 of the additive interference of the memory-enabled transmission channel, wherein an amount of correction of the first estimation varies depending on the estimated intensity level σ2 of the additive interference. 2. The method according to claim 1, wherein: the step of determining the first estimation is performed by a matched filter. 3. The method according to claim 2, wherein: the matched filter is given by where and r=(r1, . . . , rL) being a reference signal used for purposes of channel estimation, γ is a scaling factor, N is a length of a receiving-signal portion, L is a length of a chip pulse, G is a channel characteristic matrix and eref-(erefstart, . . . erefstart+N-1) being a received signal part that is not influenced by data transmitted before and after the reference signal. 4. The method according to claim 1, wherein: the first estimation is given by a least squares estimation. 5. The method according to claim 4, wherein: the least squares estimation is given by description="In-line Formulae" end="lead"ĥ=(G*��T��G)-1 ��G*T��eref.description="In-line Formulae" end="tail" 6. The method according to claim 1, wherein: the step of performing the estimation of the intensity level σ2 of the additive interference is given by description="In-line Formulae" end="lead"σ2=θ(E-(1+f) ��γ∥ĥ∥2)/(N-(1+f)) description="In-line Formulae" end="tail" with wherein f is a frequency value, N indicates a length of a receiving-signal portion and E is an energy value. 7. The method according to claim 1, wherein: the correction of the first estimation ĥk of the kth component, k 0 {1, . . . , W}, of estimation vector ĥ of the pulse response h is given by 8. The method according to claim 1, wherein: the correction of the first estimation ĥk of the kth component, k 0 {1, . . . , W}, of estimation vector ĥ of the pulse response h is given by if ĥk≅0, and otherwise description="In-line Formulae" end="lead"ĥk=0.description="In-line Formulae" end="tail" 9. The method according to claim 1, wherein: the correction of the first estimation is given by a projected onto convex sets (POCS) algorithm. 10. The method according to claim 1, wherein: the correction of the first estimation is given by a minimum mean square error (MMSE) algorithm. 11. The method according to claim 10, wherein: the MMSE algorithm is given by description="In-line Formulae" end="lead"ĥ=(G*T��G+σ2 ��I)-1��G*T-eref description="In-line Formulae" end="tail" I being the unit matrix. 12. A device for estimating a memory-enabled transmission channel, comprising: a channel estimator; an estimator of an intensity level σ2 of an additive interference, the channel estimator and the estimator of the additive interference act on a received signal; and channel estimation correcting element for correcting a signal of the channel estimator by taking into consideration an output signal of the estimator of the intensity level σ2 of the additive interference of the memory-enabled transmission channel, wherein an amount of correction of the signal varies depending on the estimated intensity level σ2 of the additive interference.