Receiving method and receiver
First Claim
1. A receiving method for use in a telecommunication system in which a number of signal components are detected simultaneously from a received signal received by a receiver, comprising:
- dividing the received signal in the time domain into blocks of a certain length,subjecting the blocks to simultaneous estimation of user data and channel parameters in the receiver by recursive processing of each block,utilizing placing of dots on an adaptive signal dot matrix in the detection of signal blocks,computing the distance between each respective momentary signal sample of the received signal and vectors pointing to the dots on the signal dot matrix, andassigning each respective momentary signal sample to a respective certain dot on the signal dot matrix by selecting the respective dot where the distance between a respective codebook vector pointing thereto and the respective momentary signal sample is the shortest.
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Accused Products
Abstract
In a receiving method for multiple access and a receiver for use in a telecommunication system, a number of signal components in a received signal and channel parameters are detected simultaneously by the use of a receiver that is approximately optimal. An adaptive signal dot matrix is controlled by means of an associative network with recursive processing of the received signal in a detector. The detection algorithm aims at simulating distortions on the channel and provides an adaptation to the current interference situation even if the origin of interference is unknown. This provides a receiver that is more resistant to interference over the radio path. A received signal is divided in the time domain into blocks of a certain length, the blocks being used for simultaneous estimation of user data and channel parameters by recursive processing of each block. A quick adaptation of the receiver to the transmission propagation conditions is thus obtained.
22 Citations
15 Claims
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1. A receiving method for use in a telecommunication system in which a number of signal components are detected simultaneously from a received signal received by a receiver, comprising:
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dividing the received signal in the time domain into blocks of a certain length, subjecting the blocks to simultaneous estimation of user data and channel parameters in the receiver by recursive processing of each block, utilizing placing of dots on an adaptive signal dot matrix in the detection of signal blocks, computing the distance between each respective momentary signal sample of the received signal and vectors pointing to the dots on the signal dot matrix, and assigning each respective momentary signal sample to a respective certain dot on the signal dot matrix by selecting the respective dot where the distance between a respective codebook vector pointing thereto and the respective momentary signal sample is the shortest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A receivers, comprising:
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an antenna; radio frequency parts; an A/D converter; and means for processing a received signal, means for dividing the received signal in the time domain into blocks of a certain length, said dividing means being operatively connected to said means for processing the received signal; means for setting initial values for estimation, said setting means being operatively connected to said means for dividing the received signal into blocks; means for updating estimation parameters; first switching means operatively connected to said means for setting the initial values for estimation and to said means for updating the estimation parameters, said first switching means having an output; detector means; means for simultaneous estimation of user data and channel parameters, said means for simultaneous estimation being operatively connected to said first switching means, and to an adaptive signal dot matrix arranged for detection of signal blocks in the detector means, the detector means being responsive to the received signal, which is being processed, for correcting the signal dot matrix used in the detection; second switching means, which are operatively connected to said estimation means and arranged to provide an output which yields an estimate for the received signal; and said means for updating the estimation parameters having an input which is operatively connected to said second switching means and having an output which is operatively connected to the first switching means. - View Dependent Claims (13, 14, 15)
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Specification