Infineon Technologies Ag

Ralf Heddergott

Martin Krüger

Claudiu Krakowski

The proposed iterative method concurrently calculates maximum likelihood estimated values for the channel coefficients (h, . . . , h; &#x3b8;) and the DC offset (d; &#x3b8;) on the basis of a training sequence (TSC) in a TDMA mobile communications system. The SAGE algorithm leads to two recursion formulae, by means of which the iterative calculation of estimated values for the channel coefficients (h, . . . , h; &#x3b8;) and for the DC offset (d; &#x3b8;) is provided.

Maximum likelihood estimation of the channel coefficients and of the DC offset in a digital baseband signal of a radio receiver using the SAGE algorithm

In a method for correlative estimation of a mobile radio channel on the basis of a training sequence (TS) which is transmitted via the mobile radio channel, a sequence of P received symbols is correlated with a subsequence of length P of the training sequence, in order to calculate a first estimated channel coefficient (&#x125;). Furthermore, the same sequence of P received symbols is correlated with at least some of the subsequences of the training sequence (TS) shifted through &#xb1;1, &#xb1;2, . . . , &#xb1;(Lt&#x2212;1) symbol positions, in order to calculate a number of further estimated channel coefficients (&#x125;,&#x125;, . . . ,&#x125;).

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Müchen, Germany

Ralf Heddergott