In some embodiments, a method for mitigating interference in a channel having multiple users can include: determining a starting angle based on a direction of a signal of interest (SOI); iteratively steering a beam away from the starting angle in opposite directions and calculating a grade of the beam; choosing the beam at a current angle as a receive beam based on the beam grade; receiving a signal using the receive beam; and decoding the SOI from one or more interfering signals using successive interference cancellation multi-user detection (SIC MUD) on the received signal.

In some embodiments, a method for mitigating interference in a channel having multiple users can include: determining a starting angle based on a direction of a signal of interest (SOI); iteratively steering a beam away from the starting angle in opposite directions and calculating a grade of the beam; choosing the beam at a current angle as a receive beam based on the beam grade; receiving a signal using the receive beam; and decoding the SOI from one or more interfering signals using successive interference cancellation multi-user detection (SIC MUD) on the received signal.

Embodiments of the present disclosure relate to a method and system to generate a waveform in a communication network. The transmitter receives an input data and transmit a generated waveform to another communication system. The input data is spread with a spread code to generate a spread data and rotated using a constellation rotation operation to produce a rotated data. The rotated data is then precoded using precoding filter to produce a precoded data, and transformed into DFT output data using DFT operation. The DFT output data is then mapped with subcarriers to generate the sub-carrier mapped DFT data and modulated using Orthogonal Frequency Division Multiplexing (OFDM) modulation to generate the waveform with low PAPR.

Embodiments of the present disclosure relate to a method and system to generate a waveform in a communication network. The transmitter receives an input data and transmit a generated waveform to another communication system. The input data is spread with a spread code to generate a spread data and rotated using a constellation rotation operation to produce a rotated data. The rotated data is then precoded using precoding filter to produce a precoded data, and transformed into DFT output data using DFT operation. The DFT output data is then mapped with subcarriers to generate the sub-carrier mapped DFT data and modulated using Orthogonal Frequency Division Multiplexing (OFDM) modulation to generate the waveform with low PAPR.

A transmitter device, a receiver device and a transceiver device for a multicarrier modulation scheme. The transmitter device is configured to obtain a plurality of signature roots based on receiving a feedback message from a receiver device, construct a Lagrange matrix or a Vandermonde matrix from the plurality of signature roots, and generate a multicarrier modulated signal based on the Lagrange matrix or the Vandermonde matrix. The receiver device is configured to determine a plurality of signature roots, construct a Lagrange matrix or a Vandermonde matrix from the plurality of signature roots, and perform a demodulation of a multicarrier modulated signal based on the Lagrange matrix or the Vandermonde matrix. The transceiver device comprises a transmitter device configured to generate a multicarrier modulated signal, and a receiver device configured to perform a demodulation of the multicarrier modulated signal.

A system that incorporates the subject disclosure may include, for example, a device comprising a memory to store instructions and a processor coupled to the memory, wherein responsive to executing the instructions, the processor performs operations. The operations comprise receiving signals over a spectrum of frequencies, providing location data of the device to a base station, receiving a request from a base station to perform a spectral analysis of the signals, detecting an interference among the signals, and providing, in response to the request, data to the base station regarding a source of the interference, wherein the data comprises a location of the source relative to the device, spectral data for identifying the source, and a time a frequency of occurrence of the interference. Other embodiments are disclosed.

A system that incorporates the subject disclosure may include, for example, a device comprising a memory to store instructions and a processor coupled to the memory, wherein responsive to executing the instructions, the processor performs operations. The operations comprise receiving signals over a spectrum of frequencies, providing location data of the device to a base station, receiving a request from a base station to perform a spectral analysis of the signals, detecting an interference among the signals, and providing, in response to the request, data to the base station regarding a source of the interference, wherein the data comprises a location of the source relative to the device, spectral data for identifying the source, and a time a frequency of occurrence of the interference. Other embodiments are disclosed.

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.

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.

A method and apparatus for reception of signals with unpredictable transmission properties enabling physically secure, unscheduled and interference-resistant communication over machine-to-machine (M2M) networks is claimed. A physical structure employs combinations of unpredictable physical dwells, spreading vectors, and selection of intended receivers. Reception methods employ blind detection and signal separation techniques, which can detect and extract transmissions intended for a receiver, and excise transmissions not intended for that receiver, as part of the despreading procedure, even if received at much higher power levels than the intended transmissions. The resultant receiver eliminates the ability for an adversary to predict and override M2M transmissions; allows reception of ad-hoc transmissions in dense environments without scheduling, CSMA/CA protocols, or feedback paths enabling scheduling, and allows macrodiverse reception of transmissions at networks of connected receivers, thereby providing additional efficiency and security improvements by exploiting the route diversity of the network.