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US 7,031,415 B2Granted
Bi-modular adaptive CDMA receiver
AssigneeMitsubish Denki Kabushiki Kaisha
InventorDavid Mottier
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AssigneeMitsubish Denki Kabushiki Kaisha
InventorDavid Mottier
Estimating the term…
The invention concerns a method of receiving a signal transmitted by a transmitter (k) and arriving at an array of antennae (300) after having propagated along a plurality of paths (i), comprising a filtering stage (310k) decomposing each antenna signal into separate signals (xl,i,k) issuing from the different paths, a channel formation step (320k) forming path signals (yi,k) from the said separate signals by means of a first set of complex coefficients (bl,i,k), a combination step (340k) linearly combining the said path signals by means of a second set of complex coefficients (ci,k) in order to supply a combined signal (zk), the method being characterized in that a plurality of first error signals (ε′i,k) are formed (331k) between a reference value (qk) of the signal transmitted and the said path signals (yi,k) and in that a second error signal (ε″k) is formed (351k) between the said reference value and the said combined signal (zk), the first and second sets of complex coefficients being adapted (330k, 350k) so as to respectively minimize the root mean square values of the first signals and of the second error signal.
Method of receiving a signal transmitted by a transmitter (k) and arriving at an array of antennae after having propagated along a plurality of paths (i), comprising a filtering stage decomposing each antenna signal into separate signals (xl,i,k) issuing from the different paths, a channel formation step forming path signals (yi,k) from the said separate signals by means of a first set of complex coefficients (bl,i,k), a combination step linearly combining the said path signals by means of a second set of complex coefficients (ci,k) in order to supply a combined signal (zk), the method being characterised in that a plurality of first error signals (εi,k) are formed between a reference value (qk) of the signal transmitted and the said path signals (yi,k) and in that a second error signal (ε″k) is formed between the said reference value and the said combined signal (zk), the first and second sets of complex coefficients being adapted so as to respectively minimise the root mean square values of the first error signals and of the second error signal.
Reception method according to one of the preceding claims, characterised in that the first set of complex coefficients is adapted according to an algorithm of the LMS or RLS type.
Device for receiving a signal transmitted by a transmitter (k), the device comprising an array of antennae (300), characterised in that it comprises mean adapted to the implementation of the steps of the method according to one of the preceding claims.
Dependencies are inferred from the claim text.