Channel estimate predicted from several previous channel estimates, for pre-equalization
View Patent ↗A data transmission method includes transmitting an encoded data signal in form of a data stream of data bursts between a transmitter and a receiver, making a decision as a function of at least one data transmission parameter as to whether an interference treatment of the data signal to be transmitted will be performed in the transmitter or in the receiver, performing the interference treatment in terms of at least one code in the transmitter, and performing the interference treatment of the data to be transmitted in terms of at least one further code in the receiver.
1. A data transmission method, comprising the steps of transmitting an encoded data signal in form of a data stream of data bursts between a transmitter and a receiver; making a decision at the transmitter as a function of at least one data transmission parameter as to whether an interference treatment of the data signal to be transmitted will be performed in the transmitter or in the receiver based on prior channel estimates; in the event that interference treatment will be performed at the transmitter performing the interference treatment on at least one coded channel in the transmitter; and in the event that interference treatment will be performed at the receiver performing the interference treatment of the data to be transmitted on at least one further coded channel in the receiver; and using as the at least one data transmission parameter on which the decision is made the at least one data transmission parameter which is a rate of change of an estimate of a pulse response of the data channel.
2. A data transmission method as defined in claim 1 , wherein the data signal is CDMA-encoded.
3. A data transmission method as defined in claim 1 ; and further comprising pre-distortion of codes of the data signal to be transmitted; and using for some codes a Dirac-pulse function as a channel estimate.
4. A data transmission method as defined in claim 3 ; and further comprising detecting the data with a channel estimate performed as a pulse function, in the receiver by a device selected from the group consisting of a rake receiving device and a receiving device.
5. A data transmission method as defined in claim 3 ; and further comprising predicting the channel estimate for the pre-equalization from a plurality of prior channel estimates.
6. A data transmission method as defined in claim 5 ; and further comprising calculating the channel estimate to be predicted from the prior channel estimates by linear extrapolation.
7. A data transmission method as defined in claim 1 ; and further comprising performing by the receiver an estimate of the channel pulse response used by the transmitter; and detecting data using this channel estimate.
8. A data transmission method as defined in claim 7 ; and further comprising filtering a received signal with the estimated pulse response; and then detecting the data by means of a rake receiving device.
9. A data transmission method as defined in claim 7 ; and further comprising using the estimated pulse response for pseudoinverse detection.