Abstract: This invention is directed to a method for mapping and positioning. The method has at least three steps. The first step calls for receiving sensor data based on location and a path of movement of a mobile device. The second step calls for generating, based on the sensor data, a path estimate and a location measurement vector (LMV), wherein the LMV includes one or more measurements at each of the locations from the sensor data from each of the locations. The third step entails generating, based on the sensor data, the path estimate, and the LMV, one or more unique path features.

Abstract: A computer-implemented method for providing a mapping tool with a semi-automatic mode of operation, comprising: retrieving map data relative to an indoor environment from an indoor positioning system (IPS); collecting sensor data from one or more units of a mobile device while the mobile device in transit within the indoor environment and sending the collected sensor data to the IPS; processing the sensor data received by the IPS in order to return to the mobile device one or more paths suggestions; and enabling a user to accept, reject or modify each path suggestion and updating the IPS accordingly.

Abstract: This invention is directed to a method for mapping and positioning. The method has at least three steps. The first step calls for receiving sensor data based on location and a path of movement of a mobile device. The second step calls for generating, based on the sensor data, a path estimate and a location measurement vector (LMV), wherein the LMV includes one or more measurements at each of the locations from the sensor data from each of the locations. The third step entails generating, based on the sensor data, the path estimate, and the LMV, one or more unique path features.

Abstract: A system and method for mapping, tracking, positioning, and navigating in GPS-denied or GPS-inaccurate areas features accurate and automatic generation and update of a pedestrian lane map based on crowd-sourcing unique path features (UPFs) in combination with associated path estimates from a plurality of mobile devices. Searching and matching newly generated UPFs and associated path estimates, to a pedestrian lane map with known UPFs and associated lanes (or lane estimates) provides simultaneous localization and mapping (SLAM) of mobile devices in GPS-denied or GPS-inaccurate areas, including indoors, underground; dense urban streets with high buildings, natural canyons, and similar environments. UPFs are robust to noise and orientation invariant, enabling operation on low cost mobile device sensors and handling of real life human behavior. The innovative UPFs and pedestrian lane map enable route finding, generating guiding instructions, tracking, and analysis of pedestrian traffic.

Abstract: A system and method for mapping, tracking, positioning, and navigating in GPS-denied or GPS-inaccurate areas features accurate and automatic generation and update of a pedestrian lane map based on crowd-sourcing unique path features (UPFs) in combination with associated path estimates from a plurality of mobile devices. Searching and matching newly generated UPFs and associated path estimates, to a pedestrian lane map with known UPFs and associated lanes (or lane estimates) provides simultaneous localization and mapping (SLAM) of mobile devices in GPS-denied or GPS-inaccurate areas, including indoors, underground; dense urban streets with high buildings, natural canyons, and similar environments. UPFs are robust to noise and orientation invariant, enabling operation on low cost mobile device sensors and handling of real life human behavior. The innovative UPFs and pedestrian lane map enable route finding, generating guiding instructions, tracking, and analysis of pedestrian traffic.

Abstract: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.

Abstract: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.

Abstract: A method for multicasting packets in a passive optical network (PON) residential gateway. The method comprises storing a payload portion of an input packet in a memory; duplicating a header of the input packet to create duplicate headers as the number of destination end-point devices; modifying each of the duplicated header to uniquely designate an output interface of an Ethernet medium access (MAC) adapter coupled to at least one of the destination endpoint devices; passing to the Ethernet MAC adapter its respective modified header together with a pointer to a location of the payload portion in the memory; generating a multicast packet by retrieving the payload portion from the memory and attaching the modified header to the payload portion; and transmitting the multicast packet to the destination endpoint device coupled to the Ethernet MAC adapter.

Abstract: A gigabit passive optical network (GPON) residential gateway comprising a microprocessor for at least processing packets including voice data and packets including video data; dual packet processors for performing GPON and residential gateway processing tasks; a plurality of Ethernet media access control (MAC) adapters for interfacing with a plurality of subscriber devices; a GPON MAC adapter for interfacing with an optical line terminal (OLT) of the GPON; and a digital signal processor (DSP) for processing voice signals.

Abstract: A gigabit passive optical network (GPON) residential gateway comprising a microprocessor for at least processing packets including voice data and packets including video data; dual packet processors for performing GPON and residential gateway processing tasks; a plurality of Ethernet media access control (MAC) adapters for interfacing with a plurality of subscriber devices; a GPON MAC adapter for interfacing with an optical line terminal (OLT) of the GPON; and a digital signal processor (DSP) for processing voice signals.

Abstract: A method for multicasting packets in a passive optical network (PON) residential gateway. The method comprises storing a payload portion of an input packet in a memory; duplicating a header of the input packet to create duplicate headers as the number of destination end-point devices; modifying each of the duplicated header to uniquely designate an output interface of an Ethernet medium access (MAC) adapter coupled to at least one of the destination endpoint devices; passing to the Ethernet MAC adapter its respective modified header together with a pointer to a location of the payload portion in the memory; generating a multicast packet by retrieving the payload portion from the memory and attaching the modified header to the payload portion; and transmitting the multicast packet to the destination endpoint device coupled to the Ethernet MAC adapter.

Abstract: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.