摘要:
A system and method for mitigating interference of a radio frequency (RF) signal includes a receiver configured to include: a decomposition module that decomposes a received RF signal into sub-bands via a multi-stage filter, each sub-band being configured to operate on real and imaginary components of the RF signal, and each stage being scaled for separating time-frequency content of the desired signal from time-frequency content of the interference; a mitigation module that suppresses the interference of the RF signal in each sub-band by zeroing an output of a respective sub-band when the frequency content exceeds a predetermined threshold; and a reconstruction module that reconstructs the RF signal from the mitigation module minus the interference. The receiver is configured to determine whether the multi-stage filter is to be reinitialized with updated time and frequency resolution requirements to improve system response.
摘要:
The present disclosure relates to a wireless communication network node (1, 1') comprising an antenna arrangement (2), a transmitter arrangement (3) that is arranged to transmit output signals (S 1 ) of a first frequency band (B 1 ), and a receiver arrangement (4) that is arranged to receive input signals (S 2 ) of a second frequency band (B 2 ). The node (1, 1') further comprises a first power distribution device (5) that is arranged to distribute power between said antenna arrangement (2) and both of said transmitter arrangement (3) and said receiver arrangement (4). The node (1, 1') further comprises an oscillator (6) that is arranged to supply an additional signal (S 3 ) of a third frequency band (B 3 ) that is added to the output signals (S 1 ). The frequencies comprised in the third frequency band (B 3 ) exceed the frequencies comprised in the first frequency band (B 1 ). The node (1, 1') further comprises a receiver filter (9) that is arranged to prevent the additional signal (S 3 ) to reach the receiver arrangement (4).
摘要:
A radio communication receiver and a method performed by the radio communication receiver for configuring a Notch filter of the radio communication receiver are disclosed. The method (100) comprises retrieving (120) stored and previously determined filter coefficients from a set of filter coefficients, where the retrieved filter coefficients constitute a fraction of the total number of filter coefficients; and setting (130) the rest of the filter coefficients to one. The method (100) further comprises normalising (140) the retrieved filter coefficients; and transforming (160) the filter coefficients such that the Notch position ends up at the one or more frequencies to be filtered out.
摘要:
There are provided a method, comprising monitoring if a predefined reference signal is decoded from a received signal, wherein the received signal is received at a predetermined resource element defined by a symbol time and a frequency range; informing a control device on receipt of an interfering pulsed signal if the reference signal is not decoded from the received signal; and a method, comprising monitoring if a total received power on a frequency range oscillates in time during a time period, wherein the frequency range and the time period are allocated to exclusively receiving reference signals; informing a control device on receipt of an interfering pulsed signal if the total received power oscillates in time.
摘要:
A method, detector and radio unit for non-linear interference detection in a communication system having a victim signal and an offending signal are disclosed. According to one aspect, a method includes determining a magnitude of the victim signal raised to a first power to produce a first signal. The method also includes determining a magnitude of the offending signal raised to a second power to produce a second signal. The first signal and the second signal are correlated to produce an output signal indicative of an extent to which the offending signal interferes with the victim signal.
摘要:
Methods and apparatus in a wireless network that allow devices, such as client devices and access points (APs), having software defined radios (SDRs) to change operating behavior depending on network RF environment conditions are disclosed. The devices may be instructed to operate according to differently defined behavior profiles that may be chosen based on RF environment conditions. The profiles may be stored in a database. A particular profile may be obtained from the database for one or more devices based on an interference level within an RF environment of the devices. The profiles may be implemented to change device operating behavior so that interference is reduced or minimized in higher levels of interference. The profiles may also be implemented to change device behavior so that interference is reduced in lower levels of interference while also freeing up resources for more efficient use in the network during lower levels of interference.
摘要:
A communication device is provided that includes a receiver configured to receive a signal. The communication device further includes a determination circuit configured to determine an interference estimation signal of the received signal based on a first signal sample of the received signal and on an interference signal model. The communication device further includes a correction circuit configured to determine a corrected interference estimation signal based on the determined interference estimation signal and on a second signal sample of the received signal. The communication device further includes a subtraction circuit configured to subtract the corrected interference estimation signal from the received signal.