Device and method for carrying out correlations in a mobile radio system

Abstract

The invention relates to a device (11) for carrying out a correlation, comprising a data memory (12) for storing a sequence of sampling values (110), an address generator (13) for generating addresses in order to read out a data word (111), whereby the sequence of the sampling values in the data word (111) must not be chronological; a code generator (15) for generating a correlation word (112) from sequence elements of a correlation sequence, whereby the sequence elements in the correlation word (112) are arranged in a sequence according to the data word (111); and a correlator unit (14).

Description

Device and method for performing correlation in mobile wireless system technical field The invention relates to a device and method for performing correlation in a mobile radio system, wherein data are exchanged wirelessly between a base station and at least one mobile radio. Background technique In mobile radio systems various operations are performed with the aid of a correlation step whose purpose is generally to compare incoming data (which is in the form of a sampled received signal at the receiver) with data known at the receiver Item sequence. The correlation signal obtained from this comparison shows in particular whether a known sequence of data items has been recognized in the received signal. The correlating step may also be used to obtain information about the time offset between the received signal and a predetermined timing. An example of the use of correlation steps in mobile radio systems is time slot and frame synchronization. In a mobile radio system,...

AI Technical Summary

Problems solved by technology

Once the correlation method has been executed at 256 sample values, a new starting index is defined, from which the correlation values ​​are calculated again from 256 sample values, this step has the disadvantage that before the new correlation method starts, The sample values ​​stored in the data memory must be recombined in a suitable way to perform the correlation method, e.g. the recombination can be performed by a shift register, at least 256 sample values ​​must be shifted to perform this recombination

This results in high power consumption of the data memory

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