Aspects of the subject disclosure may include, for example, detecting an interferer having a periodic time of recurrence and a periodic spectral frequency range, identifying a spectral segment of a plurality of spectral segments of a wideband radio system having a time of occurrence and an operating frequency range that overlaps with the periodic time of recurrence and the periodic spectral frequency range of the interferer, identifying a communication device utilizing the spectral segment for transmitting data in accordance with a segment schedule assigned to the communication device, and generating an updated segment schedule by modifying the segment schedule of the communication device to avoid utilizing an affected portion of the spectral segment during the periodic time of recurrence and the periodic spectral frequency range of the interferer. Other embodiments are disclosed.

Embodiments of the present disclosure are directed to a jam resistant signal. The signal is transmitted from a terminal to a satellite. The signal may include two waveform components. The first waveform component includes a Frequency Division Duplex (FDD) wideband Direct Spread Spectrum (DSSS) waveform. The FDD wideband DSSS waveform may include one or more spectrally notched portions. At least one of the spectrally notched portions may be for the second waveform component. The second waveform component includes an FDD narrowband waveform.

Aspects of the subject disclosure may include, for example, determining that a number of interferers in a portion of a number of spectral segments exceeds a number of filters of a number of filters. Use of the number of filters to filter interference is prioritized responsive to the number of interferers exceeding the number of filters. Interference is filtered in the portion of the number of spectral segments for suppressing at least a portion of the detected interference.

Various embodiments relate to spread spectrum modulation. A device may include a processor and at least one transmitter. The device may be configured to add a cyclic prefix (CP) to each block of a number of blocks of a direct sequence spread spectrum (DSSS) signal to generate a cyclic prefix-direct sequence spread spectrum (CP-DSSS) signal. Further, the device may be configured to transmit, via a channel, the CP-DSSS signal. Associated methods and communications systems are also disclosed.

A system that incorporates the subject disclosure may perform, for example, a method that determines at least one threshold for detecting signal interference in a first plurality of segments occurring in a first radio frequency spectrum of a first wireless communication system, detecting a pattern of recurrence over time of signal interference in a segment of the first plurality of resource blocks according to the at least one threshold, and performing one or more mitigation steps to mitigate the signal interference without filtering the signal interference where the one or more mitigation steps include at least one of transmitting signals out of phase from the signal interference, adjusting transmit power, increasing power in a resource block of a long term evolution communication session, performing beam steering, or changing time parameters for the resource block without changing to a new resource block. Other embodiments are disclosed.

A system that incorporates the subject disclosure may include, for example, a process that includes adjusting a filter in electrical communication between an input terminal and a demodulator. The filter is applied to an information bearing signal, e.g., to mitigate interference, received at the input terminal, resulting in a filtered signal. An error signal is received, indicative of errors detected within information obtained by demodulation of a modulated carrier of the filtered signal. A modified filter state is determined in response to the error signal and the filter is adjusted according to the modified filter state, e.g., to improve mitigation of the interference. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information, identifying a plurality of interferers, approximating a location of the plurality of interferers, and adjusting an antenna pattern of an antenna. The method can include determining traffic loads and adjusting the antenna pattern according to the traffic loads. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information, identifying a plurality of interferers, approximating a location of the plurality of interferers, and adjusting an antenna pattern of an antenna. The method can include determining traffic loads and adjusting the antenna pattern according to the traffic loads. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method that determines at least one threshold for detecting signal interference in a first plurality of segments occurring in a first radio frequency spectrum of a first wireless communication system, detecting a pattern of recurrence over time of signal interference in a segment of the first plurality of resource blocks according to the at least one threshold, and performing one or more mitigation steps to mitigate the signal interference without filtering the signal interference where the one or more mitigation steps include at least one of transmitting signals out of phase from the signal interference, adjusting transmit power, increasing power in a resource block of a long term evolution communication session, performing beam steering, or changing time parameters for the resource block without changing to a new resource block. Other embodiments are disclosed.

The shape of a moving object is reconstructed from a shot image under relatively-strong ambient light or an embedded image is demodulated from a video image in which an image that may not be visually recognized is embedded to display the image. The image processing method of the present invention includes irradiating flashing light to the surface of the object based on a spreading signal obtained by spread spectrum modulation, receiving reflected light from the surface of the object to output the signal including the image information, a filtering for eliminating noise including a low-frequency component from the signal including the image information, inverse-spreading the signal after the filtering to demodulate the signal, and outputting, based on a signal obtained by the demodulation, an image reflecting the state of the surface of the object.