CDMA reception method and a CDMA receiver which calculates an estimate from samples for each desired signal during a monitoring period
First Claim
1. A method of receiving signals in a CDMA system, comprising:
- sampling a received CDMA signal, including a plurality of signal components, and measuring mutual delays of transmissions from the received CDMA signal, the transmissions originating from at least one transmitter;
applying a sampled CDMA signal to an estimator which processes sampled CDMA signals such that a corresponding estimate is calculated, from the sampled CDMA signals, for each one of at least one desired signal component by utilizing all sampled CDMA signals which arrived during a particular monitoring period; and
updating the corresponding estimate for each one of the at least one desired signal component, whenever a new sampled CDMA signal arrives at the estimator, based on changes in the new sampled CDMA signal.
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Abstract
The invention relates to a reception method and a receiver comprising means where a received signal is sampled, and means where the mutual delays of the transmissions contained in the signal and the strengths of the transmissions are measured from the received signal, said transmissions originating in one or more transmitters. In order to ensure reception of high quality, the receiver according to the invention comprises means, the input of which, is the sampled signal, and in which an estimate is calculated from the samples for each desired transmission on the basis of all samples which have arrived during a certain monitoring period, and that whenever a new sample arrives at the input of the means, the means updates the calculated estimates on the basis of the new sample.
21 Citations
37 Claims
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1. A method of receiving signals in a CDMA system, comprising:
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sampling a received CDMA signal, including a plurality of signal components, and measuring mutual delays of transmissions from the received CDMA signal, the transmissions originating from at least one transmitter; applying a sampled CDMA signal to an estimator which processes sampled CDMA signals such that a corresponding estimate is calculated, from the sampled CDMA signals, for each one of at least one desired signal component by utilizing all sampled CDMA signals which arrived during a particular monitoring period; and updating the corresponding estimate for each one of the at least one desired signal component, whenever a new sampled CDMA signal arrives at the estimator, based on changes in the new sampled CDMA signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A receiver comprising:
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means for sampling a received CDMA signal; means for measuring mutual delays of transmissions included in the received CDMA signal and strengths of the transmissions, the transmissions originating in at least one transmitter; and means for calculating a corresponding estimate, from a plurality of samples of the received CDMA signal, for each one of at least one desired transmission based on all samples which arrive during a particular monitoring period, wherein whenever a new sample arrives at the receiver, the means for calculating updates the corresponding estimate for each one of the at least one desired transmission, based on changes in the new sample, without recalculating the corresponding estimate for each one of the at least one desired transmission. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification