Systems and methods for full-duplex signal shaping

1. A system for processing signals, comprising

a transmitting antenna for transmitting a signal over a plurality of wireless spectrum fragments;

a receiving antenna for receiving a signal from the plurality of wireless spectrum fragments; and

a signal processing layer in communication with the transmitting and receiving antennas for simultaneously causing reception of the received signal and transmission of the transmitted signal, the signal processing layer including

an interference cancellation component that generates an interference subtraction signal for removing a portion of interference from the received signal, the interference being caused by the transmitted signal and affecting the received signal; and

a filtering component for removing interference from a processed signal; wherein the processed signal is formed by combining the interference subtraction signal and the received signal; wherein the filtering component includes receiver circuitry for performing the following operations:

sampling of the processed signal;

down-converting the sampled processed signal into a narrowband stream; and

filtering the down-converted processed signal to remove interference.

2. The system according to claim 1 , wherein the portion of interference to be removed by the interference cancellation component is of a predetermined amount of power; wherein the predetermined amount of power is determined based on a transmit dynamic range ratio and an expected signal strength range; wherein the transmit dynamic range ratio is a ratio of a strongest transmitted signal to a weakest transmitted signal; wherein the range of expected signal strength is estimated based on a distance separating the transmitting antenna and the receiving antenna.

3. The system according to claim 1 , wherein the interference cancellation component includes a balanced-unbalanced transformer component; wherein the balanced-unbalanced transformer component combines the interference subtraction signal and the received signal to form the processed signal.

4. The system according to claim 1 , wherein the filtering component includes transmitter circuitry for performing the following operations:

up-converting of the transmitted signal; and

filtering the up-converted signal to prevent aliasing of the transmitted signal with at least another signal.

5. The system according to claim 1 , wherein the filtering component includes a plurality of filters arranged in a sequence for performing sampling and filtering of the processed signal to remove interference.

6. The system according to claim 5 , wherein the plurality of filters include at least one programmable filter, which includes at least one of the following: a finite impulse response filter, an infinite impulse response filter, and a resampling filter.

7. The system according to claim 1 , wherein the filtering component performs mapping of at least one signal received from at least one communication protocol layer to at least one frequency fragment in a wireless frequency band for transmission by the transmitting antenna.

8. A system for processing signals, comprising

an antenna for transmitting a signal over a plurality of wireless spectrum fragments and for receiving a signal from the plurality of wireless spectrum fragments; and

a signal processing layer in communication with the antenna for simultaneously causing reception of the received signal and transmission of the transmitted signal, the signal processing layer including

an interference cancellation component that generates an interference subtraction signal for removing a first portion of interference from the received signal, the interference being caused by the transmitted signal and affecting the received signal; and

a filtering component for removing interference from a processed signal; wherein the processed signal is formed by combining the interference subtraction signal and the received signal; wherein the filtering component performs mapping of at least one signal received from at least one communication protocol layer to at least one frequency fragment in a wireless frequency band for transmission by the antenna.

9. A method for reducing self-interference in a wireless communication system, the method comprising:

transmitting, on a wireless communication system, a transmit signal over a plurality of wireless spectrum fragments;

receiving, on the wireless communication system, a receive signal from the plurality of wireless spectrum fragments;

processing, using an interference cancellation component of the wireless communication system, the transmit signal to form an interference subtraction signal;

combining the interference subtraction signal with the receive signal to form a processed receive signal; wherein combination of the interference subtraction signal and the receive signal results in removal of a portion of interference present in the receive signal; wherein the portion of interference to be removed by the interference cancellation component is of a predetermined amount of power; further comprising determining the predetermined power based on a transmit dynamic range ratio and an expected signal strength range; wherein the transmit dynamic range ratio is a ratio of a strongest transmitted signal to a weakest transmitted signal; wherein the range of expected signal strength is estimated based on a distance separating a transmitting antenna and a receiving antenna;

filtering, using a filtering component, interference from the processed receive signal.

10. The method of claim 9 , wherein combining the interference subtraction signal with the receive signal comprises combining the interference subtraction signal with the receive signal using a balanced-unbalanced transformer component.

11. The method of claim 9 , wherein filtering comprises filtering using a plurality of filters arranged in a sequence.

12. The method of claim 9 , wherein filtering comprises performing mapping of at least one signal received from at least one communication protocol layer to at least one frequency fragment in a wireless frequency band for transmission by the wireless communication system.