Embodiments herein provide a method for decoding received signal by node in wireless communication system. The method includes receiving a signal from a first User Equipment (UE), where the received signal comprises a set of preambles in which each preamble is identical to an at least one preamble in a preamble structure and obtaining a composite signal comprising a self-interference signal, where the self-interference signal is known at the node. Further, the method includes determining self-interference channel estimate using the composite signal and decoding the received signal by eliminating the self-interference signal from the received signal based on the self-interference channel estimate.

A method of operating a communication device including a processor and a memory, the method comprises feeding back a downlink communication signal subjected to analog signal processing, generating signal modification information according to a comparison result of the fed-back downlink communication signal and a downlink communication signal before the analog signal processing, generating an interference cancellation signal for canceling interference occurring in an uplink communication signal by the downlink communication signal based on the generated signal modification information and canceling interference occurring in the uplink communication signal by using the generated interference cancellation signal.

Aspects described herein relate to determining, by a node, to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node, determining, by the node, to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node, establishing the first backhaul connection with the first upstream node based on a first transmit/receive beam pair, and establishing the second backhaul connection with the second upstream node based on a second transmit/receive beam pair and while the first backhaul connection is established with the first upstream node.

Mitigating interference in 5G new radio systems may include establishing a path loss range associated with a satellite earth station, and receiving a path loss value associated with a mobile device. The method further includes determining whether the path loss value is within the path loss range, and sending a message to the mobile device to change an operation of the mobile device in response to determining that the path loss value is within the path loss range.

A relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and a self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.

A method and system is disclosed for operating an in-band relay to receive and amplify an incoming radio frequency signal and forward the amplified radio frequency signal. Methods to improve isolation between receive and transmit front-ends are disclosed, enabling an increase in the amplification gain without causing oscillation. Methods for learning the impulse response of the self-interference channel, and methods to perform adaptive echo cancellation in the analog domain. In addition, methods for transmit and receive beamforming are presented that achieve two objectives: (1) Improve the signal-to-noise ratio of the relayed signal, thereby compensating for noise amplification. (2) Improve the isolation, thereby enabling to increase the relay gain without causing oscillation.

Mitigation of satellite interference is contemplated. The mitigation may include processing satellite transmissions to remove interferences based on an amount of signal overlap, such as to facilitate mitigating interferences resulting from satellite spacing and/or ground antenna dish size.

A method of operating a repeater comprises selecting some of adaptive filter coefficients among a plurality of adaptive filter coefficients of an adaptive filter used for interference cancellation, based on the size of a coefficient, generating a predicted interference signal using the selected adaptive filter coefficients and generating an interference-canceled communication signal from a received signal using the generated predicted interference signal.

A method of operating a TDD-based interference cancellation repeater, the method comprises setting a compensation gain of a gain compensator differently in an uplink communication period and a downlink communication period, setting an optimal coefficient of an adaptive filter in the uplink communication period and an optimal coefficient of the adaptive filter in the downlink communication period the same, based on the set compensation gain of the gain compensator and removing an interference signal in the uplink communication period or the downlink communication period according to the set optimal coefficient of the adaptive filter.

Methods and apparatus for implementing a repeater are described. In various embodiments the repeater determines uplink/downlink timing information either from information broadcast from a base station or from monitoring received signals and/or gaps between received signals. In various embodiments while the repeater may decode control information to determine uplink/downlink time periods, user data is not decoded and re-encoded. In various embodiments interference between uplink and downlink circuitry is reduced or minimized by controlling gains, combining weights and/or power to amplifiers in the repeater based on the mode of operation. A stored information can include sets of different weights and/or parameters for the mode of operation and/or beam forming antenna pattern in use at a given time.