| Roke Manor Research Limited Patent applications |
| Patent application number | Title | Published |
|---|
| 20120127015 | Multilateration System and Method - A multilateration system and method includes a plurality of receiver stations for receiving signals from an aircraft, and a controller that derives the position of the aircraft by applying a multilateration process to outputs from the receiver stations. For this purpose, the controller determines the altitude of the aircraft and selects a multilateration process that is to be used for position determination, based on the determined altitude. | 05-24-2012 |
| 20110306386 | Mobile Device and Method - Systems, methods and a mobile device for using policy defined by the operator to control the interfaces on which data is sent and received by the device are provided. The policy can be dynamically updated by the operator, by pushing new policy to the device for implementation. The policy can define that the device should switch certain data between two or more available interfaces at certain times, or when certain data may be sent or received over a particular interface. The device may receive new policy from the operator in order to help with the operator's own operational objectives, such as traffic shaping or other traffic limitation to ease congestion or enforce service agreements. A policy implementing corresponding traffic limitation or shaping on the air interface between the mobile device and network base stations can be sent to the mobile device so as to reduce signaling congestion on the air-interface. | 12-15-2011 |
| 20100026600 | Radio Wave Detection Apparatus - Radio wave detection apparatus includes an array of antenna elements which are able to receive radio waves which enter and leave the array. In this way antenna elements are able to cater for the detection of different types of polarisation from the one configuration. | 02-04-2010 |
| 20090303102 | Multilateration System and Method - In the described system the multilateration process to be applied to determine an aircraft's position is chosen on the basis of the available returns, receiver geometry and the height of the aircraft. | 12-10-2009 |
| 20090289868 | GROUND PLANE - A ground plane for an antenna comprises first and second planar conductors ( | 11-26-2009 |
| 20090282119 | METHOD OF FILTERING SECTIONS OF A DATA STREAM - A method of filtering sections of a data stream involves determining a set of characters of interest, testing each section of the data stream for the presence of one or more of the set of characters of interest and extracting sections in which at least one of the characters is present. | 11-12-2009 |
| 20090276427 | Method of Extracting Sections of a Data Stream - A method of extracting sections of a data stream, the sections including a set of sequences. Each sequence is encoded separately and coupled together to define a section. The method involves determining a combination of at least two sequences of the set, comparing the combination of sequences with sequences in the data stream, and rejecting or accepting extraction of the section of the data stream based upon the result of the comparison. If the combination of sequences does not include a start and end marker for the section, a search for the start and end markers is carried out before the section is extracted. | 11-05-2009 |
| 20090273519 | Multilateration Apparatus - In a multilateration apparatus a correlator is provided with a time of arrival correlation window which is set to cater for the path lengths that may be experienced before a signal from an object to be located is received by receivers in the system. This may be on the basis of the largest possible path length in the system or on a receiver by receiver basis. | 11-05-2009 |
| 20090219195 | Unwrapping of Phase Values At Array Antenna Elements - A method and apparatus are described for the unwrapping of a set of phase values observed for an incoming signal on a phased array antenna. The difference between values observed on adjacent elements in the array forms a first data set. The differences between adjacent ordinates in the first data set forms a second data set. The values in the second data set are rounded to the nearest whole multiple of one complete cycle before the differencing process is reversed to provide the values (representing a whole number of complete cycles) which are added to the observed phase values to provide the unwrapped phase values. | 09-03-2009 |
| 20090215405 | Transceiver Antennae Arrangement - An apparatus having a transmitter portion and a receiver portion each isolated from each other and comprising a plurality of antennae, each antenna being selectively connectable to both the receiver portion and transmitter portion, said antennae thus being common to both transmitter and receiver. It may be adapted such that one antenna is selectable to be used as a transmitter whilst at the same time an alternative antenna is selectable to be used as a receiving antenna. | 08-27-2009 |
| 20090027270 | Apparatus and Method for Determining Receiver Performance in a Multilateration System - In a multilateration system receivers are grouped into two groups. The first group is used to determine a position of a signal source, for example, an aircraft equipped with a SAR transponder. From the determined position, predicted time of arrival values are produced for the second group receivers. These are compared with the actual time of arrival values for the signals arriving at the second group receivers. A difference is determined and then the variation of that difference is determined as the aircraft travels in its track. The groupings are then varied and further variations determined. When the minimum variation is determined an alert is given that the second group has a receiver which is operating with a larger than desirable group time delay. | 01-29-2009 |
| 20090019220 | Method of Filtering High Data Rate Traffic - A method of filtering high data rate traffic ( | 01-15-2009 |
| 20080310427 | Method of Determining Reliability of Information - A method of determining reliability of information received at a destination ( | 12-18-2008 |
| 20080218412 | Quad Polar Transmission - The present invention provides methods and apparatus for MIMO communications across wireless fixed links, comprising a first pair of dual polar antennas, spaced apart in a direction orthogonal to the direction of the fixed link for transmission, and a second such pair for reception, wherein orthogonal polarisations of one of each pair of antennas are oriented intermediate between the orthogonal polarisations of the other of each pair of antennas. | 09-11-2008 |
