MIMO repeater system and method for canceling feedback interference using the same
US-8953725-B1 · Feb 10, 2015 · US
Interference cancellation repeater
US9813143B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9813143-B2 |
| Application number | US-201615391209-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2016 |
| Priority date | Dec 28, 2015 |
| Publication date | Nov 7, 2017 |
| Grant date | Nov 7, 2017 |
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Abstract
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An interference cancellation repeater for canceling an interference signal included in an input signal including a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a first scale factor determined according to a channel state; a second scaler configured to scale the second estimated signal based on a second scale factor determined according to the channel state; a first canceller configured to generate a first interference canceled signal based on the input signal and the scaled first estimated signal; and a second canceller configured to generate a second interference canceled signal based on the first interference canceled signal and the scaled second estimated signal.
First claim
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What is claimed is: 1. An interference cancellation repeater for canceling an interference signal included in an input signal, the interference cancellation repeater comprising: a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a first scale factor determined according to a channel state; a second scaler configured to scale the second estimated signal based on a second scale factor determined according to the channel state; a first canceller configured to generate a first interference canceled signal based on the input signal and the scaled first estimated signal; and a second canceller configured to generate a second interference canceled signal based on the first interference canceled signal and the scaled second estimated signal. 2. The interference cancellation repeater of claim 1 , wherein the first interference canceled signal is a signal which is generated by canceling some components of the interference signal corresponding to the scaled first estimated signal from the input signal, and the second interference canceled signal is a signal which is generated by canceling at least some components of the interference signal corresponding to the scaled second estimated signal from the first interference canceled signal. 3. The interference cancellation repeater of claim 1 , wherein the first and second scale factors are adaptively updated as the channel state changes. 4. The interference cancellation repeater of claim 1 , wherein the first and second scale factors have different values. 5. The interference cancellation repeater of claim 1 , wherein the first and second scale factors are each less than one. 6. The interference cancellation repeater of claim 1 , further comprising: a scaler controller configured to estimate the channel state based on the input signal and an output signal of a digital filter for filtering the second interference canceled signal, and configured to generate the first and second scale factors according to the estimation result. 7. The interference cancellation repeater of claim 1 , further comprising: a digital filter configured to generate an output signal of a frequency band transmitted to a terminal by filtering the second interference canceled signal. 8. The interference cancellation repeater of claim 7 , wherein the first adaptive filter is configured to generate the first estimated signal based on the first interference canceled signal and the output signal, and the second adaptive filter is configured to generate the second estimated signal based on the second interference canceled signal and the output signal. 9. An interference cancellation repeater for canceling an interference signal included in an input signal, the interference cancellation repeater comprising: a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a scale factor determined according to a channel state; a first canceller configured to generate a first interference canceled signal based on the input signal and the scaled first estimated signal; and a second canceller configured to generate a second interference canceled signal based on the first interference canceled signal and the second estimated signal. 10. The interference cancellation repeater of claim 9 , wherein the first interference canceled signal is a signal which is generated by canceling some components of the interference signal corresponding to the scaled first estimated signal from the input signal, and the second interference canceled signal is a signal which is generated by canceling at least some components of the interference signal corresponding to the second estimated signal from the first interference canceled signal. 11. The interference cancellation repeater of claim 9 , wherein the scale factor is adaptively updated as the channel state changes. 12. The interference cancellation repeater of claim 9 , wherein the scale factors is less than one. 13. The interference cancellation repeater of claim 9 , further comprising: a scaler controller configured to estimate the channel state based on the input signal and an output signal of a digital filter for filtering the second interference canceled signal, and configured to generate the scale factor according to the estimation result. 14. The interference cancellation repeater of claim 9 , further comprising: a digital filter configured to generate an output signal of a frequency band transmitted to a terminal by filtering the second interference canceled signal. 15. The interference cancellation repeater of claim 14 , wherein the first adaptive filter is configured to generate the first estimated signal based on the first interference canceled signal and the output signal, and the second adaptive filter is configured to generate the second estimated signal based on the second interference canceled signal and the output signal.
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- H04B7/15585Primary
by interference cancellation · CPC title
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- What does patent US9813143B2 cover?
- An interference cancellation repeater for canceling an interference signal included in an input signal including a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a first scale factor determined according to a channel state; a s…
- Who is the assignee on this patent?
- Solid Inc
- What technology area does this patent fall under?
- Primary CPC classification H04B7/15585. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 07 2017 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).