Abstract: A radome structure of an antenna system is provided having a plurality of switchable antenna elements disposed around a perimeter of the radome structure that can simultaneously track multiple targets and be implemented in a variety of different applications. Each of the switchable antenna elements can be individually switched between different radiation patterns to support different applications. The antenna system may include an infrared (IR) sensor pedestal, an IR sensor disposed on the IR pedestal and a plurality of switchable radio frequency (RF) antenna elements disposed in a circumferential direction around the IR sensor pedestal. In an embodiment, each of the plurality of switchable RF antenna elements can be switched from a first radiation pattern to a second radiation pattern to change an array radiation pattern of the antenna.

Abstract: A compact, wideband antenna system includes first and second monopole radiating elements positioned near an edge of a common ground plane. The first and second monopole radiating elements may be located on opposite sides of the ground plane. Additional monopole elements may also be provided. In some embodiments, the ground plane includes an opening in a central region thereof to accommodate an optical system. In some embodiments, an additional antenna (e.g., an array antenna) may be provided over the same ground plane in a region between the monopole elements.

Abstract: A radome structure of an antenna system is provided having a plurality of switchable antenna elements disposed around a perimeter of the radome structure that can simultaneously track multiple targets and be implemented in a variety of different applications. Each of the switchable antenna elements can be individually switched between different radiation patterns to support different applications. The antenna system may include an infrared (IR) sensor pedestal, an IR sensor disposed on the IR pedestal and a plurality of switchable radio frequency (RF) antenna elements disposed in a circumferential direction around the IR sensor pedestal. In an embodiment, each of the plurality of switchable RF antenna elements can be switched from a first radiation pattern to a second radiation pattern to change an array radiation pattern of the antenna.

Abstract: A compact, wideband antenna system includes first and second monopole radiating elements positioned near an edge of a common ground plane. The first and second monopole radiating elements may be located on opposite sides of the ground plane. Additional monopole elements may also be provided. In some embodiments, the ground plane includes an opening in a central region thereof to accommodate an optical system. In some embodiments, an additional antenna (e.g., an array antenna) may be provided over the same ground plane in a region between the monopole elements.

Abstract: A terrain aided navigation using multi-channel monopulse radar imaging to provide a navigation position update. The monopulse radar transmits a single RF pulse transmission or multiple quick RF pulse train bursts to generate a monopulse radar image that can be correlated with a digital terrain segment to provide navigation updates when requested. The radar has monopulse and off-axis capability that allows for selection of a terrain segment within the radar's search area that will provide a good terrain correlation. The radar measurements are made on a range/Doppler cell-by-cell basis that includes angle information. The cells in the range/Doppler map corresponding to the antenna main beam return are converted into a high resolution (x,y,z) image and correlated to the selected terrain segment in the data base reference frame to provide an updated navigation position estimate.

Abstract: Method and system for a network switch element is provided. The switch element includes a plurality of megaports, each megaport uniquely identified by a unique megaport address identifier for network addressing. Each megaport includes a plurality of operational ports, each operational port identified by a unique operational port address identifier. The switch element also includes a local crossbar for communication between the plurality of operational ports, and a shared logic module configured to provide common control of the plurality of operational ports within a megaport to allow operational ports to share resource of a single megaport to route network packets there between. The switch element also includes a global crossbar configured to allow communication between the megaports.

Abstract: A high-speed Fiber Channel switch element in a Fiber Channel network is provided. The Fiber Channel switch element includes, a rate select module that allows a port in the Fiber Channel switch element to operate at a rate equal to and/or higher than 10 gigabits per second (“G”). The port may operate at 20 G, 40 G or at a rate greater than 40 G. Also, a cut status is provided for cut-through routing between ports operating at different speed. Plural transmit and receive lines are used for port operation at a rate equal to or higher than 10 G.

Abstract: A high-speed Fibre Channel switch element in a Fibre Channel network is provided. The Fibre Channel switch element includes, a rate select module that allows a port in the Fibre Channel switch element to operate at a rate equal to and/or higher than 10 gigabits per second (“G”). The port may operate at 20 G, 40 G or at a rate greater than 40 G. Also, a cut status is provided for cut-through routing between ports operating at different speed. Plural transmit and receive lines are used for port operation at a rate equal to or higher than 10 G.

Abstract: A high-speed Fiber Channel switch element in a Fiber Channel network is provided. The Fiber Channel switch element includes, a rate select module that allows a port in the Fiber Channel switch element to operate at a rate equal to and/or higher than 10 gigabits per second (“G”). The port may operate at 20G, 40G or at a rate greater than 40G. Also, a cut status is provided for cut-through routing between ports operating at different speed. Plural transmit and receive lines are used for port operation at a rate equal to or higher than 10G.

Abstract: Method and system for a network switch element is provided. The switch element includes a plurality of megaports, each megaport uniquely identified by a unique megaport address identifier for network addressing. Each megaport includes a plurality of operational ports, each operational port identified by a unique operational port address identifier. The switch element also includes a local crossbar for communication between the plurality of operational ports, and a shared logic module configured to provide common control of the plurality of operational ports within a megaport to allow operational ports to share resource of a single megaport to route network packets there between. The switch element also includes a global crossbar configured to allow communication between the megaports.

Abstract: Method and system for a switch element is provided. The method includes (a) receiving a portion of a packet at a port of the switch element; (b) generating a tag based on an estimated packet size obtained from the portion of the packet; (c) sending the tag with the estimated packet size to a transmit segment of the port; (d) selecting a request from among a plurality of pending requests for processing the packet associated with the tag; (e) receiving an actual packet size for the packet in step (a); (f) determining if the actual packet size is different from the estimated packet size; and (g) adjusting an arbitration weight used for selecting the request in step (d), if the actual packet size is different from the estimated packet size.

Abstract: A method and system for distributing credit using a fiber channel switch element is provided. The switch element includes, a wait threshold counter that is used to set up a status for a port that has to wait for certain duration to send a frame due to lack of buffer to buffer credit; a credit module that controls buffer to buffer credit for a transmit segment of the fiber channel switch element; and a virtual lane credit module with a counter that is incremented every time a frame assigned to a virtual lane is sent and decreased every time a VC_RDY is received. The method includes, determining if a VC_RDY primitive is received; and allocating credit to a virtual lane that is not at its maximum credit, after the VC_RDY primitive is received.

Abstract: Method and system for a network switch element is provided. The switch element includes a plurality of megaports, each megaport uniquely identified by a unique megaport address identifier for network addressing. Each megaport includes a plurality of operational ports, each operational port identified by a unique operational port address identifier. The switch element also includes a local crossbar for communication between the plurality of operational ports, and a shared logic module configured to provide common control of the plurality of operational ports within a megaport to allow operational ports to share resource of a single megaport to route network packets there between. The switch element also includes a global crossbar configured to allow communication between the megaports.

Abstract: The disclosed system and method for determining direction-of-arrival generally includes an antenna element and a processor. The antenna element may configured to generate a signal in response to an electromagnetic wave. The processor may be process the signal to determine the direction-of-arrival of the electromagnetic wave. Further, the direction-of-arrival may be determined based on an estimate of the direction-of-arrival of at least one of the electric field and the magnetic field of the electromagnetic wave.

Abstract: A method and system for distributing credit using a fibre channel switch element is provided. The switch element includes, a wait threshold counter that is used to set up a status for a port that has to wait for certain duration to send a frame due to lack of buffer to buffer credit; a credit module that controls buffer to buffer credit for a transmit segment of the fibre channel switch element; and a virtual lane credit module with a counter that is incremented every time a frame assigned to a virtual lane is sent and decreased every time a VC_RDY is received. The method includes, determining if a VC_RDY primitive is received; and allocating credit to a virtual lane that is not at its maximum credit, after the VC_RDY primitive is received.

Abstract: Method and system for a network switch element is provided. The switch element includes a plurality of megaports, each megaport uniquely identified by a unique megaport address identifier for network addressing. Each megaport includes a plurality of operational ports, each operational port identified by a unique operational port address identifier. The switch element also includes a local crossbar for communication between the plurality of operational ports, and a shared logic module configured to provide common control of the plurality of operational ports within a megaport to allow operational ports to share resource of a single megaport to route network packets there between.

Abstract: A method and system for processing received and transmit data by an application specific integrated circuit (ASIC) from a network link. The method for received data includes swapping received data polarity if swap-polarity ability is set and swapping byte lanes for the received data if swap-lane ability is set. The method for transmit data includes swapping byte lanes for transmit data, if swap-byte lane ability is set and swapping data polarity if swap-polarity ability is set. The ASIC includes a network connector that receives and transmits data from the network link.

Abstract: Method and system for routing fiber channel frames using a fiber channel switch element is provided. The method includes, inserting a time stamp value in a fiber channel frame that is received at a receive segment of the fibre channel switch element; determining if a timeout occurs after a frame arrives at a receive buffer; and processing the frame if the timeout occurred. The method also includes, determining if a delta time value, which provides an accumulated wait time for a frame, is present in frame data; subtracting the delta time stamp value from a global time stamp value and using the resulting time stamp value to determine frame timeout status in the fiber channel switch element. A timeout checker circuit declares a timeout after comparing a time stamp value that is inserted in a fiber channel frame with a programmed time out value and a global counter value.

Abstract: A method and system for distributing credit using a fiber channel switch element is provided. The switch element includes, a wait threshold counter that is used to set up a status for a port that has to wait for certain duration to send a frame due to lack of buffer to buffer credit; a credit module that controls buffer to buffer credit for a transmit segment of the fiber channel switch element; and a virtual lane credit module with a counter that is incremented every time a frame assigned to a virtual lane is sent and decreased every time a VC_RDY is received. The method includes, determining if a VC_RDY primitive is received; and allocating credit to a virtual lane that is not at its maximum credit, after the VC_RDY primitive is received.

Abstract: Method and system for managing frame traffic in a Fibre Channel network with plural switch elements with receive and transmit ports is provided. The method includes limiting a number of R_RDYs sent between frames, when frames are waiting to be transmitted at a given time, for minimizing a number of ordered sets transmitted between frames. The switch element includes a R_RDY control module that stores a number of R_RDYs that a port has to send, stores an actual number of R_RDYs that are sent since a last frame is transmitted; stores a number of R_RDYs that are sent between frames and this number of R_RDYs can be programmed to be less than two; and stores a threshold value that is less than or equal to a maximum R_RDY count value.