Abstract: A cognitive radio scanning method is disclosed that enables cognitive radios to rapidly scan for neighboring channels by staggering the position of beacons across the frame relative to other channels and intelligently allocate the bandwidth across super frames such that a device has the ability to switch and scan multiple beacons both within and across multiple super frames.

Abstract: A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built in slot reservation algorithm.

Abstract: This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the well-known LMS solution of W=(ATA)?1*d that is computed from received multi antenna and multicarrier signals in a novel way.

Abstract: A system and method for enabling voice and broadband data delivery to users in expeditionary deployments is disclosed. More specifically the system is composed of a registration server, a wireless telco network server, a wide area transport network, and an external network interconnect (like satellite or fiber location) such that when users arrive at a disaster scene where communications infrastructure has been destroyed or is unavailable, they are either handed a smart device (smartphone, laptop, tablet, etc.) or they utilize an existing smart device they brought with them (BYOD) and via the Wi-Fi interface they connect to the wide area transport network.

Abstract: A system and method for enabling voice and broadband data delivery to users in expeditionary deployments is disclosed. More specifically the system is composed of a registration server, a wireless telco network server, a wide area transport network, and an external network interconnect (like satellite or fiber location) such that when users arrive at a disaster scene where communications infrastructure has been destroyed or is unavailable, they are either handed a smart device (smartphone, laptop, tablet, etc.) or they utilize an existing smart device they brought with them (BYOD) and via the Wi-Fi interface they connect to the wide area transport network.

Abstract: The invention disclosed in this application describes a diversity combiner that operates as a maximal ratio combiner (MRC) when no interference is detected and as a selection combiner when Orthogonal Frequency Division Multiplexing symbol errors are detected with high probability by using a symbol error detection method based on computing a symbol by symbol path error metric.

Abstract: A cognitive radio signal processing method suitable for single receiver devices where interference is mitigated using projection of received multi-dimensional signal space to maximize SNR by orthogonalizing interference is described. The method is based on a well-known LMS solution that is computed from received multi antenna and multicarrier signals in a novel way. This method solves the requirement of multiple RF chains in low cost handsets by introducing a protocol synchronous antenna switcher that allows, for example, a LTE handset with a single antenna to benefit from algorithms that typically require multiple receivers for the same frequency, i.e. MIMO.

Abstract: A cognitive radio scanning method is disclosed that enables cognitive radios to rapidly scan for neighboring channels by staggering the position of beacons across the frame relative to other channels and intelligently allocate the bandwidth across super frames such that a device has the ability to switch and scan multiple beacons both within and across multiple super frames.

Abstract: The invention disclosed in this application describes methods to coordinate spectrum measurement periods in access points or base stations in a time division duplex (TDD) system where the super frame is divided into uplink and downlink portions for use in cognitive radio systems.

Abstract: The invention disclosed in this application describes an error detection method that can be used to identify an OFDM symbol that is interfered with. The method is based on computing a symbol by symbol path error metric from error correction code and by comparing the statistics of each individual symbol to the mean and the variance of the metric computed from the whole data packet.

Abstract: This invention describes a cognitive radio receiver architecture where multiple specialized receiver algorithms are executed in parallel. For example, maximal ratio combiner and beam forming algorithms may be running parallel. The receiver system computes solutions using different hypotheses of channel conditions and chooses the best result, i.e. is able to decode data from one of the parallel receivers.

Abstract: A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built in slot reservation algorithm.

Abstract: The invention disclosed in this application describes methods to coordinate spectrum measurement periods in access points or base stations in a time division duplex (TDD) system where the super frame is divided into uplink and downlink portions for use in cognitive radio systems.

Abstract: This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the well-known LMS solution of W=(ATA)?1*d that is computed from received multi antenna and multicarrier signals in a novel way.

Abstract: This invention describes a cognitive radio receiver architecture where multiple specialized receiver algorithms are executed in parallel. For example, maximal ratio combiner and beam forming algorithms may be running parallel. The receiver system computes solutions using different hypotheses of channel conditions and chooses the best result, i.e. is able to decode data from one of the parallel receivers.

Abstract: The invention disclosed in this application describes a diversity combiner that operates as a maximal ratio combiner (MRC) when no interference is detected and as a selection combiner when OFDM symbol errors are detected with high probability.

Abstract: The invention disclosed in this application describes an error detection method that can be used to identify an OFDM symbol that is interfered with. The method is based on computing a symbol by symbol path error metric from error correction code and by comparing the statistics of each individual symbol to the mean and the variance of the metric computed from the whole data packet.

Abstract: This invention describes a hardware and software architecture for concurrent dual-band or multi-band operation. More specifically this invention describes a multi-band cognitive radio network that allows terminals to efficiently use signal processing and RF resources by synchronizing the framing in multiple frequency bands. The invention is useful in TDMA systems by allowing efficient use of signal processing resources.

Abstract: A system and method for medium access control (MAC) protocol which controls transmissions in wireless devices to at least substantially comply with specific absorption rate (SAR) limits. The system and method of MAC protocol uses “source-based” time averaging measurements of transmitter “on-times” and an integral of transmission power to direct transmitter duty-cycle such that SAR limits are met. The system and method monitors and controls topology-dependent functions of a node transceiver, including transceiver duty cycle, transceiver transmit power levels and transceiver power-time products, using a automatic transmission control protocol (ATP) to vary functions to maintain specific absorption rate (SAR) limits for handheld and portable devices which are used close to human bodies. In cases in which SAR limits are approached, the ATP can direct the transceiver at the device to adjust each function, or combination of functions, to maintain an acceptable SAR limit.

Abstract: A technique for distributing channel allocation information in a demand access communication system. Multiple access codes are used that have a defined code repeat period or code epoch. For each such epoch duration, a schedule of assignment of traffic channels to active terminals for each epoch is determined. For each terminal designated as active during the epoch, a list of active channels for such terminal unit is assigned. Prior to the start of each epoch, a channel set up message is sent on one of the forward link channels, such as a paging channel, indicating the lists of active channels for epochs of the associated traffic channel(s) that are to follow.