Abstract: A multi-band synchronizer that performs robustly in the presence of partial-band interference by breaking down the correlation of a sync waveform at a plurality of times, with one or more received signal branches into a multitude of sub-band correlations, and combining the sub-band correlations such that the impact of partial-band interference on synchronization performance is significantly mitigated is disclosed.

Abstract: A MIMO antenna used in both transmit and receive operations, with the ability to serve an n-by-n MIMO transceiver architecture (where n can take integer values between 0 to 4). The structure is designed to increase the effective area of the array by coupling the bars of the antenna to the disc and results in good isolation and low envelope correlation.

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: An IP packet transmission system is disclosed and more specifically it is a system using a hybrid ARQ method including a sliding purge window and having the transmitter opportunistically piggy-back a snapshot of the transmitter's transmit/send window in data frames. When the receiver receives this snapshot the receiver can compare it with its receive window and if a mismatch is detected, whereby the transmitter has moved on to the next packet, the receiver can now also sync up quicker and not wait for the regular timeout to progress ahead.

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: An IP packet transmission system is disclosed and more specifically it is a system using a hybrid ARQ method including a sliding purge window and having the transmitter opportunistically piggy-back a snapshot of the transmitter's transmit/send window in data frames. When the receiver receives this snapshot the receiver can compare it with its receive window and if a mismatch is detected, whereby the transmitter has moved on to the next packet, the receiver can now also sync up quicker and not wait for the regular timeout to progress ahead.

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: An IP packet transmission system is disclosed and more specifically it is a system using a hybrid ARQ method that includes a sliding purge window to reduce packet losses and improve TCP throughput thus ensuring data integrity, improving reliability, and to some extent guaranteeing in-order delivery of packets at the receiver.

Abstract: A MIMO antenna used in both transmit and receive operations, with the ability to serve an n-by-n MIMO transceiver architecture (where n can take integer values between 0 to 4). The structure is designed to increase the effective area of the array by coupling the bars of the antenna to the disc and results in good isolation and low envelope correlation.

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 header compression method for a MAC protocol that combines contention-free and contention-based MAC protocols into a heterogeneous MAC protocol used for forwarding VoIP traffic in VoIP systems on wireless networks using multiple base stations that reduces packet overhead thus allowing for transmission of high bit-rate data to multiple users over wired and wireless means.

Abstract: A mechanism for decreasing the latency in an IP address assignment process for mobile systems using IP as network layer protocol is described. The proposed system is aimed at supporting seamless hand-offs for real-time applications like VOIP. A set of optimized messages is defined to eliminate the need for exchanging long DHCP messages to acquire an IP address. The mechanism involves splitting the IP address assignment functionality into two parts, with the base station being responsible for assigning IP addresses to individual end user devices, and the Mobile Switching Center assigning a block of IP addresses to each base station.

Abstract: In wireless networks where the goal is to support a large number of VOIP based cellular calls, large overhead headers in RTP voice packets are not acceptable. In wireless networks where multiple base stations are deployed, handsets may handoff from one base station to the other while in a voice call creating a large overhead. This disclosure describes an efficient way to extend a header compression algorithm and lower the overhead when the handset is in a voice call and hands off from one base station to another.