Method and apparatus for tuning finite impulse response filter in in-band full duplex transceiver
AssigneeElectronics and Telecommunications Research Institute
InventorsKapseok CHANG, Hyung Sik JU
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Abstract
A method and an apparatus for tuning an FIR filter in an in-band full duplex transceiver. The method for tuning an FIR filter includes: converting an input signal of the FIR filter into a first signal that is a baseband signal; converting a signal obtained by subtracting an output signal of the FIR filter from the self-transmitted interference signal into a second signal that is the baseband signal; and calculating attenuation of the FIR filter using the first signal and the second signal.
Claims20
A method for tuning a finite impulse response (FIR) filter in an in-band full duplex transceiver, the FIR filter receiving a transmitted signal to cancel a self-transmitted interference signal, the method comprising
- converting an input signal of the FIR filter into a first signal that is a baseband equivalent signal;
- converting a signal obtained by subtracting an output signal of the FIR filter from the self-transmitted interference signal into a second signal that is the baseband equivalent signal;
- calculating attenuation of the FIR filter using the first signal and the second signal;
- and
- applying the attenuation to the FIR filter.
An in-band full duplex transceiver, comprising:
- a transmitter generating and transmitting a transmitted signal;
- a finite impulse response (FIR) filter receiving the transmitted signal to cancel a self-transmitted interference signal;
- a receiver converting a first signal that is a signal obtained by subtracting an input signal of the FIR filter from the self-transmitted interference signal into a second signal that is a baseband frequency signal and converting an input signal of the FIR filter into a third signal that is a baseband frequency signal;
- and
- an estimator using the second signal and the third signal to set the attenuation of the FIR filter.
A method for tuning a finite impulse response (FIR) filter in an in-band full duplex transceiver, the in-band full duplex transceiver including a transmitter generating and transmitting a transmitted signal, a receiver converting a received signal into a baseband frequency signal, and the FIR filter receiving the transmitted signal to cancel a self-transmitted interference signal, the method comprising converting an input signal of the FIR filter into a first signal that is a baseband frequency signal;
- converting a signal obtained by subtracting an output signal of the FIR filter from the self-transmitted interference signal into a second signal that is the baseband frequency signal;
- estimating a delta response using the first signal and the second signal.
- calculating attenuation of the FIR filter using the delta response;
- and
- applying the attenuation to the FIR filter.
Dependencies are inferred from the claim text.