Method of combatting interference by spatial filtering or spatio-temporal filtering in a multi-channel receiver
US-10243593-B2 · Mar 26, 2019 · US
Method for cancelling multi-path signals for frequency-modulated radio signal receiver
US10608683B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10608683-B2 |
| Application number | US-201816489742-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 29, 2018 |
| Priority date | Jun 1, 2017 |
| Publication date | Mar 31, 2020 |
| Grant date | Mar 31, 2020 |
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Abstract
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A method for decreasing multi-path interference, for the implementation thereof in a vehicle radio receiver including a radio reception antenna that receives a plurality of radio signals corresponding to an emitted radio signal, the plurality of signals received by the antenna being composed of time-shifted radio signals, the plurality of signals being intended to be combined in order to deliver a combined radio signal zn to be played, with zn=WnTYn, the method aiming to determine the complex components of the vector of complex weights and including: introducing a temporal correlation, between the real and imaginary parts of the complex weights, that is dependent on the time shift between said received signals, by the expression of the complex weights in polar coordinates, implementing an iterative adaptation algorithm in order to determine the gains and delays of said complex weights able to keep constant over time the modulus of zn.
First claim
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The invention claimed is: 1. A method for decreasing multi-path interference, for implementation thereof in a vehicle radio receiver, said radio receiver being intended to receive an emitted radio signal and comprising a radio reception antenna that receives a plurality of radio signals corresponding to said emitted radio signal, said plurality of signals received by said antenna being composed of time-shifted radio signals resulting from a multi-path effect, said plurality of radio signals being intended to be combined in order to deliver a combined radio signal z n to be played, with z n =W n T Y n at the time n, where Y n is a vector the components of which correspond to the plurality of received signals, expressed in complex baseband, and W n is a vector the components of which correspond to complex weights intended to be attributed to each of the radio signals of said plurality of received radio signals, respectively, in order to form the combined radio signal z n in which a set of secondary radio signals resulting from the multi-path effect are canceled out, said method aiming to determine said complex components of said vector of complex weights and comprising: Introducing a temporal correlation between the real and imaginary parts of said complex weights, said correlation being dependent on the time shift between said signals of said plurality of received radio signals, by means of the expression of said complex weights in polar coordinates, so that W n = [ g o exp ( j θ o ) g 1 exp ( j θ 1 ) ⋮ ⋮ g K - 1 exp ( j θ K - 1 ) ] , so as to incorporate an interdependence between the real and imaginary parts of said complex weights, and Implementing an iterative adaptation algorithm in order to determine the g 0 , g 1 , . . . , g k-1 and θ 0 , θ 1 , . . . , θ k-1 able to keep constant over time the modulus of z n . 2. The method as claimed in claim 1 , wherein said iterative adaptation algorithm is a constant-modulus adaptation algorithm. 3. The method as claimed in claim 2 , comprising determining a constant R corresponding to the modulus of the envelope of the frequency-modulated radio signal emitted, the implementation of the iterative adaptation algorithm consisting in determining G n , Θ n able to minimize over time the cost function characterized by the following instantaneous gradient: ∇ J C M A = 2 ( z n 2 - R 2 ) [ 2 Re [ z n
Assignees
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Classifications
to be used in vehicles (H04B1/086 takes precedence; holding or mounting accessories B60R11/02) · CPC title
- H04B1/1081Primary
Reduction of multipath noise (by equalising H04B7/005) · CPC title
Affine projection · CPC title
Adaptive algorithms · CPC title
Demodulator circuits; Receiver circuits · CPC title
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- What does patent US10608683B2 cover?
- A method for decreasing multi-path interference, for the implementation thereof in a vehicle radio receiver including a radio reception antenna that receives a plurality of radio signals corresponding to an emitted radio signal, the plurality of signals received by the antenna being composed of time-shifted radio signals, the plurality of signals being intended to be combined in order to delive…
- Who is the assignee on this patent?
- Continental Automotive France, Continental Automotive Gmbh
- What technology area does this patent fall under?
- Primary CPC classification H04B1/1081. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).