Signal processing method, apparatus, and system
First Claim
1. A signal processing method for a base station, comprising:
- receiving, by the base station, a downlink signal that carries an uplink signal;
performing, by the base station, first interference cancellation on the carried uplink signal of the received downlink signal by using an estimated self-interference signal, so that a remaining amount of interference of the carried uplink signal of the received downlink signal is less than a first interference threshold in order to reduce out-of-band interference of the carried uplink signal, the first interference cancellation on the carried uplink signal of the received downlink signal being performed by a radio frequency interference canceller, which uses the estimated self-interference signal;
converting the received down link signal into a digital signal by an analog-to-digital converter, wherein the digital downlink signal carries a remaining self-interference signal of the carried uplink signal; and
performing, by using a digital interference canceller, second interference cancellation on the remaining self-interference signal of the carried uplink signal that is obtained after the first interference cancellation, so that the remaining amount of interference of the remaining self-interference signal of the carried uplink signal is less than a second interference threshold, wherein the digital interference canceller applies an estimated remaining self-interference signal to perform the second interference cancellation.
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Accused Products
Abstract
Embodiments of the present invention disclose a signal processing method, apparatus, and system, where the method includes: receiving a downlink signal that carries an uplink signal; and performing first interference cancellation on the uplink signal by using an estimated self-interference signal, so that a remaining amount of interference of the uplink signal is less than a first interference threshold, thereby minimizing out-of-band interference of the uplink signal on the downlink signal without using a plurality of radio frequency front-ends or without using a duplexer on a same radio frequency front-end. In the embodiments of the present invention, no duplexer is adopted, and therefore, difficulty and a cost of base station and system layout can be reduced, and extra energy consumption of a mobile terminal can also be reduced.
19 Citations
16 Claims
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1. A signal processing method for a base station, comprising:
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receiving, by the base station, a downlink signal that carries an uplink signal; performing, by the base station, first interference cancellation on the carried uplink signal of the received downlink signal by using an estimated self-interference signal, so that a remaining amount of interference of the carried uplink signal of the received downlink signal is less than a first interference threshold in order to reduce out-of-band interference of the carried uplink signal, the first interference cancellation on the carried uplink signal of the received downlink signal being performed by a radio frequency interference canceller, which uses the estimated self-interference signal; converting the received down link signal into a digital signal by an analog-to-digital converter, wherein the digital downlink signal carries a remaining self-interference signal of the carried uplink signal; and performing, by using a digital interference canceller, second interference cancellation on the remaining self-interference signal of the carried uplink signal that is obtained after the first interference cancellation, so that the remaining amount of interference of the remaining self-interference signal of the carried uplink signal is less than a second interference threshold, wherein the digital interference canceller applies an estimated remaining self-interference signal to perform the second interference cancellation. - View Dependent Claims (2, 3)
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4. A base station, comprising:
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at least one memory comprising instructions and at least one hardware processor to execute the instructions within the at least one memory to implement; receiving a downlink signal that carries an uplink signal; performing first interference cancellation on the carried uplink signal of the received downlink signal by using an estimated self-interference signal, so that a remaining amount of interference of the carried uplink signal of the received downlink signal is less than a first interference threshold in order to reduce out-of-band interference of the carried uplink signal, the first interference cancellation on the carried uplink signal of the received downlink signal being performed by a radio frequency interference canceller, which uses the estimated self-interference signal; converting the received down link signal into a digital signal by an analog-to-digital converter, wherein the digital downlink signal carries a remaining self-interference signal of the carried uplink signal; and performing, by using a digital interference canceller, second interference cancellation on the remaining self-interference signal of the carried uplink signal that is obtained after the first interference cancellation, so that the remaining amount of interference of the remaining self-interference signal of the carried uplink signal is less than a second interference threshold, wherein the digital interference canceller applies an estimated remaining self-interference signal to perform the second interference cancellation. - View Dependent Claims (5, 6, 7, 8)
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9. A signal processing method for a mobile terminal, comprising:
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receiving, by the mobile terminal, a downlink signal that carries an uplink signal; performing, by the mobile terminal, first interference cancellation on the carried uplink signal of the received downlink signal by using an estimated self-interference signal, so that a remaining amount of interference of the carried uplink signal of the received downlink signal is less than a first interference threshold in order to reduce out-of-band interference of the carried uplink signal, the first interference cancellation on the carried uplink signal of the received downlink signal being performed by a radio frequency interference canceller, which uses the estimated self-interference signal; converting the received down link signal into a digital signal by an analog-to-digital converter, wherein the digital downlink signal carries a remaining self-interference signal of the carried uplink signal; and performing, by using a digital interference canceller, second interference cancellation on the remaining self-interference signal of the carried uplink signal that is obtained after the first interference cancellation, so that the remaining amount of interference of the remaining self-interference signal of the carried uplink signal is less than a second interference threshold, wherein the digital interference canceller applies an estimated remaining self-interference signal to perform the second interference cancellation. - View Dependent Claims (10, 11)
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12. A mobile terminal, comprising:
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at least one memory comprising instructions and at least one hardware processor to execute the instructions within the at least one memory to implement; receiving a downlink signal that carries an uplink signal; performing first interference cancellation on the carried uplink signal of the received downlink signal by using an estimated self-interference signal, so that a remaining amount of interference of the carried uplink signal of the received uplink signal is less than a first interference threshold in order to reduce out-of-band interference of the carried uplink signal, the first interference cancellation on the carried uplink signal of the received downlink signal being performed by a radio frequency interference canceller, which uses the estimated self-interference signal; converting the received down link signal into a digital signal by an analog-to-digital converter, wherein the digital downlink signal carries a remaining self-interference signal of the carried uplink signal; and performing, by using a digital interference canceller, second interference cancellation on the remaining self-interference signal of the carried uplink signal that is obtained after the first interference cancellation, so that the remaining amount of interference of the remaining self-interference signal of the carried uplink signal is less than a second interference threshold, wherein the digital interference canceller applies an estimated remaining self-interference signal to perform the second interference cancellation. - View Dependent Claims (13, 14, 15, 16)
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Specification