Abstract: An Unmanned Aerial Vehicle (UAV) comprises a situational awareness system coupled to at least one onboard sensor and senses the location of other UAVs. A cooperative Radio Access Network (RAN)-signal processor is configured to process RAN signals cooperatively with at least one other UAV to increase the rank of the RAN channel and produce RAN performance criteria. A flight controller provides autonomous navigation control of the UAV's flight based on the relative spatial locations of other UAVs and the RAN performance criteria, which operates within predetermined boundaries of navigation criteria. The UAV can employ mitigation tactics against one or more UEs identified as a threat and may coordinate other UAVs to conduct such mitigations.

Abstract: A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled to a set of antennas residing on multiple ones of a plurality of geographically distributed wireless terminals in a Mobile Radio Network. The MIMO subspace processing system can comprise a distributed computing system. The MIMO antenna array is adapted by updating the set of antennas to produce a second set of antennas; selecting an updated set of distributed computing resources, if necessary, to perform MIMO subspace processing; and reconfiguring the MIMO subspace processing to employ channel state information of the second set to enable multiple non-interfering subspace channels occupying a common frequency.

Abstract: In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete Fourier Transform (DFT) spreader configured to spread data symbols with Fourier coefficients to generate DFT-spread data symbols. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread data symbols onto OFDM subcarriers to produce a pre-coded OFDM transmission signal. The DFT spreader is configured to reduce the transmission signal's peak to average power.

Abstract: An Unmanned Aerial Vehicle (UAV) comprises a situational awareness system coupled to at least one onboard sensor and senses the location of other UAVs. A cooperative Radio Access Network (RAN)-signal processor is configured to process RAN signals cooperatively with at least one other UAV to increase the rank of the RAN channel and produce RAN performance criteria. A flight controller provides autonomous navigation control of the UAV's flight based on the relative spatial locations of other UAVs and the RAN performance criteria, which operates within predetermined boundaries of navigation criteria. The UAV can employ mitigation tactics against one or more UEs identified as a threat and may coordinate other UAVs to conduct such mitigations.

Abstract: In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete Fourier Transform (DFT) spreader provides data symbols spread with Fourier coefficients to generate DFT-spread data symbols. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread data symbols onto OFDM subcarriers to produce a pre-coded OFDM transmission signal. The Fourier coefficients reduce the transmission signal's peak to average power.

Abstract: An OFDM transmitter spreads original data symbols with a complex-valued spreading matrix derived from a discrete Fourier transform. Spread data symbols are mapped to OFDM subcarriers. Spreading and mapping are configured to produce a transmitted spread-OFDM signal with a low peak-to-average power ratio (PAPR) and orthogonal code spaces. In MIMO systems, the complex-valued spreading matrix can comprise a MIMO precoding matrix, and the code spaces can comprise MIMO subspaces. In Cooperative-MIMO, a combination of low code-space cross correlation and low PAPR can be achieved.

Abstract: A wireless user equipment (UE) device obtains uplink and/or downlink grants for control and data communications from a base station in a first network and configures a secondary network link for device-to-device (D2D) communications between the UE device and another UE device operating in a second network. The secondary network link employs a spectrum resource allocated for the uplink and/or downlink grants in the first network. The UE device can comprise a first-network controller that inserts first-network control signals into a control portion of a frame, an application-layer processor that inserts user data into a data payload portion of the frame, and a second-network controller communicatively coupled to the application-layer processor that inserts second-network control signals into the data payload portion of the frame. This can allow a transmission to be processed by networks that employ different radio access network technologies.

Abstract: In a wireless communication system, a receiver comprises an Orthogonal Frequency Division Multiplexing (OFDM) demodulator configured to demodulate a spread-OFDM signal transmitted from a user equipment (UE) to produce demodulated data symbols corresponding to OFDM subcarriers assigned to the UE. A discrete Fourier transform (DFT)-based despreader is configured to despread the demodulated data symbols to produce estimates of original data symbols, wherein the despreader employs a DFT despreading code corresponding to a DFT spreading code employed by the UE to shape the spread-OFDM signal into a plurality of uniformly spaced pulse waveforms modulated with the original data symbols. A frequency-domain equalizer may be provided to equalize and/or spatial deumultiplex the demodulated data symbols before despreading.

Abstract: A radio transceiver comprises a first baseband processor, a second baseband processor, and a radio transmitter coupled to the first and second baseband processors. The first baseband processor receives a radio channel allocation from a first network comprising a radio frequency reserved for communicating in the first network. The second baseband processor is configured to process baseband data for communicating in a second network. The radio transmitter is configured to employ the radio frequency for communication in the second network while the radio frequency is reserved in the first network.

Abstract: In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete Fourier Transform (DFT) spreader configured to spread data symbols with Fourier coefficients to generate DFT-spread data symbols. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread data symbols onto OFDM subcarriers to produce a pre-coded OFDM transmission signal. The DFT spreader is configured to reduce the transmission signal's peak to average power.

Abstract: In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete Fourier Transform (DFT) spreader configured to spread reference-signal symbols with Fourier coefficients to generate DFT-spread reference symbols. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread reference symbols onto OFDM subcarriers to produce a pre-coded OFDM transmission signal.

Abstract: A node in a first wireless network requests a radio communication channel from a second wireless network. Upon receiving a channel assignment, nodes in the first network employ the assigned channel for communicating in a manner that is transparent to the second network. Communications via the second wireless network may initiate communications in the first wireless network, keep the assigned channel reserved, communicate network control messages for the first wireless network, transmit a decoy signal, and/or communicate a reference signal. Antenna array processing can prevent the first and second wireless networks from interfering with each other.

Abstract: An OFDM transmitter spreads original data symbols with a complex-valued spreading matrix derived from a discrete Fourier transform. Spread data symbols are mapped to OFDM subcarriers. Spreading and mapping are configured to produce a transmitted spread-OFDM signal with a low peak-to-average power ratio (PAPR) and orthogonal code spaces. In MIMO systems, the complex-valued spreading matrix can comprise a MIMO precoding matrix, and the code spaces can comprise MIMO subspaces. In Cooperative-MIMO, a combination of low code-space cross correlation and low PAPR can be achieved.

Abstract: An apparatus configured for selecting a plurality of edge-server sets, comprising: A metrics manager collects network topology information from edge servers and/or client devices. A request-routing mechanism determines a device network topology for each of a plurality of device types. For each device network topology, a device-specific edge-server set is selected. Device-specific data signals are distributed for storage on a corresponding device-specific edge-server set. A trellis-exploration algorithm can be used to determine each device-specific edge-server set.

Abstract: In a content delivery network, a metrics manager processes network topology information from channel measurements collected from at least one of a digi-node field and a client field, and distributes data signals to a selected edge-server set for storage and delivery to client devices. A parent server selects the edge-server set by employing an algorithm that constructs a trellis having a number of states at least equal to a number of edge servers in the edge-server set, wherein each state comprises a plurality of nodes, each node corresponding to one of a plurality of candidate edge servers. A trellis-exploration algorithm provides interconnects between each node of a first state to each of a plurality of nodes in a next state, and for each node in a state, selects a path corresponding to a best performance metric that connects to a node in a previous state, wherein each performance metric comprises the network topology information.

Abstract: A set of edge servers in a content delivery network is selected to serve a set of users. Selection comprises constructing a trellis having a number of states at least equal to a number of edge servers in the edge-server set, wherein each state comprises a plurality of nodes, each node corresponding to one of a plurality of candidate edge servers. A fitness function is calculated based on network performance improvement and cost corresponding to each candidate edge server. A trellis-exploration algorithm is used to select the edge-server set by identifying a path through the trellis having optimal path metrics derived from the fitness function. The algorithm provides interconnects between each node of a first state to each of a plurality of nodes in a next state, and for each node in a state, a path is selected that corresponds to a best path metric that connects to a node in a previous state, wherein the best path metric comprises the fitness function.

Abstract: An OFDM transmitter comprises a Discrete Fourier Transform (DFT) spreader configured to spread reference-signal symbols with Fourier coefficients to generate DFT-spread reference symbols, which are mapped to OFDM subcarriers. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread reference symbols onto the OFDM subcarriers to produce an OFDM transmission signal with low peak-to-average power.

Abstract: A source node selects a plurality of transmitting nodes to cooperatively encode a set of original packets to transfer to a destination node. Encoding produces a plurality of coded packets and a corresponding code matrix of coefficients. The coded packets and the corresponding code matrix comprise a set of independent equations of independent variables in a system of linear equations, wherein the independent variables comprise the original packets. A destination node may select a set of receiving nodes to cooperatively receive the transmissions. The destination node collects the coded packets and code matrix from the receiving nodes, which provide a sufficient number of independent equations for decoding the original packets. Decoding comprises calculating a solution for the system of linear equations.

Abstract: A source node selects a plurality of transmitting nodes to cooperatively encode a set of original packets to transfer to a destination node. Encoding produces a plurality of coded packets and a corresponding code matrix of coefficients. The coded packets and the corresponding code matrix comprise a set of independent equations of independent variables in a system of linear equations, wherein the independent variables comprise the original packets. A destination node may select a set of receiving nodes to cooperatively receive the transmissions. The destination node collects the coded packets and code matrix from the receiving nodes, which provide a sufficient number of independent equations for decoding the original packets. Decoding comprises calculating a solution for the system of linear equations.

Abstract: A software defined radio (SDR) virtualizes physical-layer processing operations of a radio access network (RAN) communication standard. The SDR comprises multiple components which are distributed across network nodes communicatively coupled by a fronthaul network. The SDR components are coordinated to function as a RAN transceiver. In one aspect, the SDR can simultaneously support multiple RAN communication protocols and function as a personalized virtual base station for each and every client device in the RAN.