Patent ID: 6345075
Filing Date: 2002-02-05
Classification: H04B

Abstract:
A process for data transmission in a cellular mobile radio network in which at least one transmitter/receiver station a phase-controlled antenna group is provided which is equipped with a circuit (30) for adaptively influencing the antenna signal weighting factors (W11-k to WMR-k) for producing a directional characteristic and, for the adaptation of the antenna signal weighting factors (W11-k to WMR-k) a nonlinear structure (100-k) is used for antenna signal processing whereby the nonlinear structure (100-k) is comprised of a forward filter (101-k), a feedback filter (12-k) and a decision circuit (40-k) and the antenna signals are initially fed via the forward filter (101-k) then fed to the decision circuit (40-k) and from the decision circuit (40-k) via the feed back filter (12-k), after which the output signal (SFBF-k) of the feedback filter (120k) is subtracted from the output signal (SFFF-k) of the forward filter (101-k), characterized in that for increasing the subscriber capacity in the cellular mobile network, a plurality (K) of subscribers are supplied in the cellular mobile radio network at one and the same frequency and one and the same time slot, where K is an integer, that for each K subscriber, a nonlinear structure (100-k) or for all K subscribers a common nonlinear structure is provided to which all serviced subscribers are treated in a time multiplex process, that for the actual data detection the output signal (SFFF-k) of the forward filter (101-k) before subtraction of the output signal (SFBF-k) of the feedback filter (12-k) is fed to an MLSE, Maximum Likelihood Sequence Estimation, (200-k) for each subscriber or to a common vectorial MLSE (201) whereby the feedback filter (12-k) is matched to the processing window length D of the MLSE (200-k) or vectorial MLSE (201), where D is an integer.