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| Number | Title | Issue Date |
| 7409189 | Calibration and testing architecture for receivers A method and apparatus are provided to generate calibration signals to multiple stages in a receiver channel. The multiple stages are calibrated using multiple calibration circuits, where a controller controls each calibration circuit. The controller is coupled to t... | 08/05/2008 |
| 7394880 | Method and apparatus for simulating radio channel A radio channel simulator configured to read radio channel data describing a radio channel and user data including at least one user signal, and to simulate the radio channel using a FIR filter comprising one or more FIR blocks for filtering the user data read based... | 07/01/2008 |
| 7378918 | Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simple configuration even in the event of inputting a wide band baseband modulation ... | 05/27/2008 |
| 7363013 | Phase lock loop applying in wireless communication system and method thereof A phase lock loop receives a baseband signal which has an input frequency, and modulating the baseband signal to be a corresponding RF signal which has a predetermined transmission frequency for transmitting. The phase lock loop comprises a programmable divider, a m... | 04/22/2008 |
| 7353006 | Closed loop power control of non-constant envelope waveforms using sample/hold A radio frequency output power control system for use in communication systems is disclosed. The power control system is used for a modulation scheme having a non-constant amplitude envelope and comprises a power amplifier having a power amplifier input for receivin... | 04/01/2008 |
| 7349380 | System and method for providing an addressing and proxy scheme for facilitating mobility of wireless nodes between wired access points on a core network of a communications network A communications network which is capable of effectively and efficiently handling mobility of wireless user terminals between access point nodes of a packet-switched network with minimal overhead and packet loss, and a method for using the same. The communications n... | 03/25/2008 |
| 7349458 | Linear receivers for time-hopping impulse radio systems In a time-hopped impulse radio system, each symbol is transmitted over a channel having different multipath components as a set of Nf frames. Each frame includes one pulse. All frames of a received signal corresponding to the symbol are sampled to generat... | 03/25/2008 |
| 7324795 | Method of controlling phase locked loop in mobile station, and mobile station A method of controlling a phase locked loop in a mobile station and a mobile station of a cellular telecommunications system are provided. The mobile station comprises an integrated phase locked loop for generating output frequencies; a frequency control unit for pr... | 01/29/2008 |
| 7302235 | Synchroniser A synchroniser for use in a receiver which receives signals, wherein the synchronizer provides a digital control signal, the control signal defining a plurality of different levels; controls the level provided by successive ones of the control signals, successive on... | 11/27/2007 |
| 7295819 | Signal sample acquisition techniques A sample acquisition apparatus for sampling first and second signals within a signal processing arrangement, includes a sampler for capturing sections of the waveforms of both the first and second signals, a switch for alternating correction of the sampler to a poin... | 11/13/2007 |
| 7284268 | System and method for a routing device to securely share network data with a host utilizing a hardware firewall A system and method for providing the ability to selectively share data in a network routing device with an associated host. The system and method employs a hardware firewall in the routing device which restricts the host such that it can only access areas in shared... | 10/16/2007 |
| 7280555 | System and method employing algorithms and protocols for optimizing carrier sense multiple access (CSMA) protocols in wireless networks A system and method for achieving enhanced CSMA/CA which improves channel availability and quality of service (QoS) in a wireless communications network. The system and method establish channels to enable communication between nodes in a communication network, based... | 10/09/2007 |
| 7280545 | Complex adaptive routing system and method for a nodal communication network A complex adaptive routing system and method for routing data packets in a nodal network, in particular, an ad-hoc nodal network. Each data packet contains data representing its routing strategy for routing to a destination node. When a node receives the data packet... | 10/09/2007 |
| 7269217 | PWM controller with integrated PLL A pulse-width modulation (PWM) controller to supply power to electronic components using a phase lock loop (PLL) is presented. A PWM controller comprises an input node operable to receive a reference signal and a phase-locked loop (PLL). The PLL comprises an oscilla... | 09/11/2007 |
| 7266104 | Time division protocol for an AD-HOC, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel An ad-hoc, peer-to-peer radio system includes a series of radio terminals forming a service group, each radio terminal having a transceiver for communicating with terminals in the same service group, computer means, and memory for storing program software. Within th... | 09/04/2007 |
| 7228118 | Method of calibrating PLL frequency synthesizers to precise frequencies with low tolerance crystals in their master reference oscillators A frequency tracking circuit and method comprising a master crystal oscillator circuit is used for frequency tracking between a handset and a base station comprising a calibration subsystem for taking a temperature measurement, a reference control circuit for determ... | 06/05/2007 |
| 7221921 | Partitioning of radio-frequency apparatus Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as o... | 05/22/2007 |
| 7221686 | System and method for computing the signal propagation time and the clock correction for mobile stations in a wireless network A system and method for enabling a node, such as a mobile user terminal in a wireless communications network, such as an ad-hoc network, to effectively and efficiently determine a clock correction factor for its local clock relative to a local clock of at least one ... | 05/22/2007 |
| 7215638 | System and method to provide 911 access in voice over internet protocol systems without compromising network security A system and method to provide emergency call access in Voice over Internet Protocol (VoIP) systems without compromising network security. The system and method enables VoIP emergency signal detection at a user device, and transmission of the VoIP emergency signal f... | 05/08/2007 |
| 7212504 | Time division protocol for an ad-hoc, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel A novel protocol for an ad-hoc, peer-to-peer radio network that provides collision-free channel access with an emphasis on improving geographic reuse of the frequency spectrum. The protocol of the invention is executed on the reservation or control channel, and prov... | 05/01/2007 |
| 7209770 | Power supply IC having switching regulator and series regulator An integrated circuit for supplying power includes an IC chip having a rectangular shape and having a first edge and a second edge opposite the first edge, a switching regulator implemented on the IC chip and having a driver transistor whose ON time of switching is ... | 04/24/2007 |
| 7206294 | Movable access points and repeaters for minimizing coverage and capacity constraints in a wireless communications network and a method for using the same A system and method for improving the ability of a wireless communications network, such as a packet-switched data communications network, to provide service to mobile user terminals. The system and method employs a mobile access point, adapted for use with the pack... | 04/17/2007 |
| 7200149 | System and method for identifying potential hidden node problems in multi-hop wireless ad-hoc networks for the purpose of avoiding such potentially problem nodes in route selection A system and method for identifying potential hidden node problems in a multi-hop wireless ad-hoc communication network, such as an 802.11 network. The system and method evaluates the relationship between the neighbors of each respective node to identify nodes of a ... | 04/03/2007 |
| 7197290 | Method for AM band interference suppression via frequency shift Methods are provided for suppressing interference in a motor vehicle radio such as an AM radio from the operating frequency or the harmonics of the operating frequency of a source of time varying signal such as a switching power supply in response to tuning the radi... | 03/27/2007 |
| 7197016 | Time division protocol for an ad-hoc, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel A novel protocol for an ad-hoc, peer-to-peer radio network that provides collision-free channel access with an emphasis on improving geographic reuse of the frequency spectrum. The protocol of the invention is executed on the reservation or control channel, and prov... | 03/27/2007 |
| 7194263 | System and method for concurrent operation of a wireless device in two disjoint wireless networks A system and method for wireless network communications provides a “dual-mode” wireless device that operates concurrently as a member of two disjoint wireless networks, such as an infrastructure (“IS”) network and an ad hoc (“AH”) network. The dual-mode ... | 03/20/2007 |
| 7190672 | System and method for using destination-directed spreading codes in a multi-channel metropolitan area wireless communications network A system and method for enabling a node in a mobile wireless ad-hoc communications network to use a particular spreading code to spread a message to be transmitted to a destination node without having to provide information on the spreading code to the destination n... | 03/13/2007 |
| 7187246 | Oscillator circuit In the case of a voltage-controlled LC oscillator (4), the effects of supply voltage fluctuations are reduced according to the invention, due to the fact that a stabilized voltage source (3) is assigned to the LC oscillator (4), which supplies t... | 03/06/2007 |
| 7184720 | Method and device for simulating radio channel The invention relates to a method and device for performing channel simulation, the device comprising a set of channel simulation units (200 to 214) for simulating a radio channel, each unit comprising radio frequency parts (200A to 214A)... | 02/27/2007 |
| 7181214 | System and method for determining the measure of mobility of a subscriber device in an ad-hoc wireless network with fixed wireless routers and wide area network (WAN) access points A system and method for determining the mobility of a node in a network, such as a wireless ad-hoc network that requires the node to share its information with other mobile and stationary nodes, such as fixed wireless routers and intelligent access points, so that t... | 02/20/2007 |
| 7181187 | RF transmitter having improved out of band attenuation A radio frequency transmitter includes a digital baseband and coding module, an inverse fast Fourier transform (IFFT) module, a complex digital filter, a complex digital-to-analog converter and a radio frequency modulation module. The digital baseband and coding mod... | 02/20/2007 |
| 7180875 | System and method for performing macro-diversity selection and distribution of routes for routing data packets in Ad-Hoc networks A communications network which is capable of effectively and efficiently handling fading between mobile wireless user terminals of a packet-switched network with minimal overhead and packet loss, and a method for using the same. The communications network employs an... | 02/20/2007 |
| 7177361 | Modulator for electromagnetic signals transmitted by a contactless transmission/reception system A data transmission device using electromagnetic wave radiation in a contactless transceiver system toward a contactless object, the data bits transmitted corresponding to the half cycle of an initial time interval during which electromagnetic waves are emitted at a... | 02/13/2007 |
| 7174139 | Delay control in a digital radio transmitter system A relative delay between analog R.F. output signals of a plurality of digital radio transmitters in a digital radio transmitter system is controlled. At least one interface receives delay information for each transmitter. A processing unit determines the relative de... | 02/06/2007 |
| 7167715 | System and method for determining relative positioning in AD-HOC networks A system and method for improving the ability of a portable voice and data wireless communications network to provide position information regarding mobile nodes located within a network. The system and method employs mobile access points, wireless routers, and mobi... | 01/23/2007 |
| 7151769 | Prioritized-routing for an ad-hoc, peer-to-peer, mobile radio access system based on battery-power levels and type of service An ad-hoc, peer-to-peer radio access system having a series of remote terminals, where each remote terminal is capable of forming a node, or hop, of the routing of a call made by one of the series of terminals. The call is routed along a routing path of terminals ba... | 12/19/2006 |
| 7149197 | Movable access points and repeaters for minimizing coverage and capacity constraints in a wireless communications network and a method for using the same A system and method for improving the ability of a wireless communications network, such as a packet-switched data communications network, to provide service to mobile user terminals. The system and method employs a mobile access point, adapted for use with the pack... | 12/12/2006 |
| 7145903 | Multi-master bus architecture for system-on-chip designs A bus architecture system to provide concurrency, fabricated on an integrated circuit for a system on chip design, for connecting a plurality of bus masters to a plurality of bus slaves. The system includes a plurality of multiplexers in communication with each data... | 12/05/2006 |
| 7142524 | System and method for using an ad-hoc routing algorithm based on activity detection in an ad-hoc network A system and method for detecting communication requirements in a network and placing nodes in various stages of activity where conditions allow. The system and method provides an algorithm to detect changes in node activity levels and alter operations, such as upda... | 11/28/2006 |
| 7136587 | System and method for providing simulated hardware-in-the-loop testing of wireless communications networks A system and method for efficiently and effectively simulating hardware-in-the-loop testing of a wireless communications network. The system and method employs an optical matrix-vector multiplier (MVM) for performing optical signal processing to simulate radio frequ... | 11/14/2006 |
