Abstract: A communication device includes a receiver that is capable of canceling in-channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in-channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract: Disclosed herein are methods and systems for embedding a supplementary data channel in LTE-based communication systems. One embodiment takes the form of a process that includes obtaining a primary data signal. The primary data signal includes a given symbol, and the given symbol includes primary payload data prepended with a given cyclic prefix. The process also includes obtaining supplementary payload data. The process also includes generating a modified primary data signal at least in part by replacing an initial portion of the given cyclic prefix with a subset of the supplementary payload data. The process also includes outputting the generated modified primary data signal for transmission via an air interface.

Abstract: A communication device includes a receiver that is capable of canceling in -channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in -channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract: Disclosed herein are methods and systems for presenting prioritized incident content. One embodiment takes the form of a method that includes receiving one or more status alerts from one or more public-safety devices associated with one or more public-safety responders. The method also includes correlating one or more of the received status alerts with one or more media sessions involving one or more of the public-safety responders. The method also includes prioritizing one or more of the media sessions based on prioritization criteria that includes the one or more status alerts correlated with those media sessions. The method also includes presenting one or more of the prioritized media sessions in a chronological view on respective user interfaces of one or more public-safety communication devices.

Abstract: Disclosed herein are methods and systems for embedding a supplementary data channel in LTE-based communication systems. One embodiment takes the form of a process that includes obtaining a primary data signal. The primary data signal includes a given symbol, and the given symbol includes primary payload data prepended with a given cyclic prefix. The process also includes obtaining supplementary payload data. The process also includes generating a modified primary data signal at least in part by replacing an initial portion of the given cyclic prefix with a subset of the supplementary payload data. The process also includes outputting the generated modified primary data signal for transmission via an air interface.

Abstract: Disclosed herein are methods and systems for concurrent narrowband and broadband communication. An embodiment takes the form of a method that involves generating a narrowband public-safety-radio (PSR) signal for transmission on a downlink of a PSR network. The method further involves generating a multicarrier wideband signal for transmission on a downlink of a wireless wide area network (WWAN), where the multicarrier wideband signal includes a null DC subcarrier. The method also involves producing a combined signal that includes the superposition of (i) the narrowband PSR signal centered on a characteristic frequency of the null DC subcarrier and (ii) the multicarrier wideband signal. Additionally, the method involves transmitting the combined signal for receipt of the narrowband PSR signal at the characteristic frequency by at least one public-safety radio and receipt of the multicarrier wideband signal by at least one WWAN access terminal.

Abstract: Disclosed herein are methods and systems for presenting prioritized incident content. One embodiment takes the form of a method that includes receiving one or more status alerts from one or more public-safety devices associated with one or more public-safety responders. The method also includes correlating one or more of the received status alerts with one or more media sessions involving one or more of the public-safety responders. The method also includes prioritizing one or more of the media sessions based on prioritization criteria that includes the one or more status alerts correlated with those media sessions. The method also includes presenting one or more of the prioritized media sessions in a chronological view on respective user interfaces of one or more public-safety communication devices.

Abstract: A communication device includes a receiver that is capable of canceling in-channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in-channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract: A wireless communication device is provided that is capable of suppressing out-of-channel emissions. The wireless communication device includes an upsampled broadband multicarrier signal generator and multiple upsampled sidelobe signal generators. The upsampled broadband multicarrier signal generator receives a symbol stream and, based on the symbol stream, generates a broadband multicarrier signal comprising an in-channel signal and a first multiple out-of-channel sidelobes. Each upsampled sidelobe signal generator of the multiple upsampled sidelobe signal generators receives at least a portion of the symbol stream and, based on at least a portion of the symbol stream, generates an out-of-channel sidelobes to produce a second multiple out-of-channel sidelobes.

Abstract: A multi-antenna device (200) comprising a set of antennas (210-214), a set of receivers (220-224), a multiplexer (270), a baseband filter (242), an analog-to-digital converter (244), and a de-multiplexer (272). The receivers (220-224) can be linked to the antennas (210-214) in a one-to-one manner. The multiplexer (270) can generate a composite analog signal from a set of different analog signals, one received from different ones of the antennas (210-214). The baseband filter (242) can filter the composite analog signal. The analog-to-digital converter (244) can convert the composite analog signal after being filtered by the baseband filter into a composite digital signal. The de-multiplexer (272) can generate a set of different digital signals from the composite digital signal. Each of the different digital signals can correspond to one of the different analog signals in a one-to-one manner.

Abstract: A wireless communication device is provided that is capable of suppressing out-of-channel emissions. The wireless communication device includes an upsampled broadband multicarrier signal generator and multiple upsampled sidelobe signal generators. The upsampled broadband multicarrier signal generator receives a symbol stream and, based on the symbol stream, generates a broadband multicarrier signal comprising an in-channel signal and a first multiple out-of-channel sidelobes. Each upsampled sidelobe signal generator of the multiple upsampled sidelobe signal generators receives at least a portion of the symbol stream and, based on at least a portion of the symbol stream, generates an out-of-channel sidelobes to produce a second multiple out-of-channel sidelobes.

Abstract: A communication device includes a receiver that is capable of canceling in-channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in-channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract: A method and apparatus for multi-resolution multi-bandwidth spectral signal estimation is provided herein. During operation, a plurality of detectors is provided to determine if an input signal is above a predetermined threshold. The input signal comprises a first frequency range having a first bandwidth. If it is determined that the input signal of the first bandwidth is above a first predetermined threshold, then the same plurality of detectors are used to further analyze sub-bands of the first frequency range, each sub-band having a second bandwidth less than the first bandwidth. The further analysis determines if an input signal to a detector is above a second predetermined threshold.

Abstract: A communication device and method of allocating spectrum resources in a communication system to protect data to be transmitted are disclosed. The communication channel resource is divided temporally to form regions. Data to be transmitted is separated into data portions. Each data portion is able to be transmitted over one of the regions. The data portions are prioritized based on the importance of the data portion. The regions are ranked based on the transmission reliability thereon. The prioritized data portions are mapped to the ranked regions such that more important data portions are mapped to more reliable regions and less important data portions are mapped to less reliable regions. The prioritized data is output temporally in order of importance to enable the mapping of the prioritized data.

Abstract: A multi-antenna device (200) comprising a set of antennas (210-214), a set of receivers (220-224), a multiplexer (270), a baseband filter (242), an analog-to-digital converter (244), and a de-multiplexer (272). The receivers (220-224) can be linked to the antennas (210-214) in a one-to-one manner. The multiplexer (270) can generate a composite analog signal from a set of different analog signals, one received from different ones of the antennas (210-214). The baseband filter (242) can filter the composite analog signal. The analog-to-digital converter (244) can convert the composite analog signal after being filtered by the baseband filter into a composite digital signal. The de-multiplexer (272) can generate a set of different digital signals from the composite digital signal. Each of the different digital signals can correspond to one of the different analog signals in a one-to-one manner.

Abstract: A method, wireless controller, and information processing system are provided to dynamically allocate spectrum sensing resources. A first input (804) including available sensing session time for performing spectrum sensing with respect to one or more primary systems (102) is received. A second input (806) including a set of communication channels to be monitored in the spectrum sensing session is received. A third input (808) including detection constraints associated with a plurality of available sensing nodes (114) in a secondary network (104) for performing the spectrum sensing is received. Spectrum sensing resources are dynamically allocated (814) among a set of the plurality of available sensing nodes (114) based on the first (804), second (806), and third inputs (808).

Abstract: A method and apparatus for synchronization in a dynamic spectrum access system is provided herein. During operation a transmitter will vary a known sequence to generate a preamble for each radio frame. The variation of the known sequence is based on what particular subcarriers are currently being used by the transmitter. In one embodiment, the preamble is coupled to the filterbank multicarrier synthesis to generate an over-the-air preamble for use in synchronizing a receiver.

Abstract: A method, wireless device, and information processing system dynamically update spectrum sensing groups in a wireless communication system. A set of wireless devices (114) currently allocated to a spectrum sensing group is identified. Each wireless device (114, 116, 118) in the set performs spectrum sensing on one or more wireless communication channels. Spectrum sensing performance data (144) is analyzed for each such wireless device (114) in the set. The spectrum sensing performance data (144) indicates wireless communication performance of a wireless device (114) associated with the spectrum sensing performance data with respect to detecting a transmitted signal on the one or more communication channels. Wireless device membership of the set of wireless devices (114, 116, 118) allocated to the spectrum sensing group is dynamically adjusted based on the analysis.

Abstract: A cognitive radio wireless device (114) dynamically manages signal detection in a cognitive radio system (100). Spectrum sensing is performed for a first sensing frame on at least one communication channel. At least one observed signal is received (204) on the at least one communication channel. A detection decision (210) is performed to determine if the observed signal is noise or an active signal associated with an active user. The detection decision (210) is performed by comparing observed signal energy estimation with a current detection threshold. The current detection threshold can be an arbitrarily defined threshold or a detection threshold based on a previous detection decision for a sensing frame immediately prior to the first sensing frame.

Abstract: A communication device and method of allocating spectrum resources in a communication system to protect data to be transmitted are disclosed. The communication channel resource is divided temporally to form regions. Data to be transmitted is separated into data portions. Each data portion is able to be transmitted over one of the regions. The data portions are prioritized based on the importance of the data portion. The regions are ranked based on the transmission reliability thereon. The prioritized data portions are mapped to the ranked regions such that more important data portions are mapped to more reliable regions and less important data portions are mapped to less reliable regions. The prioritized data is output temporally in order of importance to enable the mapping of the prioritized data.