Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7184734 | Radio communication apparatus A radio communication apparatus using an array antenna has a plurality of reception branches for conveying reception signals received at the antenna element of the array antenna, and a calibration branch for selecting one of the plurality of reception branches and c... | 02/27/2007 |
| 7181246 | Adaptive communications system and method An arrangement where a transmitter has multiple transmitting antennas that simultaneously transmit, and where the signals delivered to each transmitting antenna is processed by a space-time transmitter based on the side information that is related to the channel coe... | 02/20/2007 |
| 7161529 | Dual forward scattering method for modeling multipath propagation Analysis of electromagnetic (or acoustic) multipath propagation inventively focuses upon the transmitter-to-target propagation (transmitted propagation reaching target via both direct pathway and forward scattered pathway) and the target-to-receiver propagation (re-... | 01/09/2007 |
| 7155245 | Multipath distortion eliminating filter An adaptive filter for an FM receiver comprises a digital filter, an error detection section for detecting an error between the amplitude of the output signal of the digital filter and a reference value, and a coefficient updating section for updating tap coefficien... | 12/26/2006 |
| 7155165 | Method and radio station for the transmission of predistored signals via several radio channels A method and radio stations for transmitting signals between a first radio station (1) and a second radio station (2) are proposed, in which the influence of amplitude fluctuations or fading can be reduced. In a modulator (4) of the first radio ... | 12/26/2006 |
| 7151944 | Method and apparatus for using synchronous CDMA in a mobile environment The present invention relates to a method and apparatus for reducing interference arising from signal propagation delay in multipath signal environments in wireless communication systems. The present invention provides a method of operating a mobile communications b... | 12/19/2006 |
| 7151508 | Antenna system and RF signal interference abatement method Disclosed is an antenna system including a Luneberg Lens having a spherically shaped outer surface and a spherically shaped focal surface spaced from its outer surface with a plurality of patch antenna elements disposed along the focal surface of the Luneberg Lens; ... | 12/19/2006 |
| 7151802 | High frequency content recovering method and device for over-sampled synthesized wideband signal In a method and device for recovering the high frequency content of a wideband signal previously down-sampled, and for injecting this high frequency content in an over-sampled synthesized version of the wideband signal to produce a fill-spectrum synthesized wideband... | 12/19/2006 |
| 7145959 | Smart antenna based spectrum multiplexing using existing pilot signals for orthogonal frequency division multiplexing (OFDM) modulations A system and method for using a group of pilot signals to enhance a data signal within an orthogonal frequency division multiplexing (OFDM) multiple-access scheme is described. The OFDM multiple-access scheme has multiple OFDM transmitters using at least overlapping... | 12/05/2006 |
| 7146146 | Systems and methods for coherent adaptive calibration in a receiver An improved calibration system for a receiver is configured to calibrate the I and Q paths to correct for gain mismatch and quadrature phase errors. In a preferred embodiment, the calibration system calibrates the I and Q paths by using a calibration signal and a re... | 12/05/2006 |
| 7142830 | Adaptive transceiver system A method for forming signals at a transceiver having at least two transmit and receive chains, the method comprising the steps of: (a) determining the phase difference and relative amplitude of signals from a set comprising a plurality of mobile stations as received... | 11/28/2006 |
| 7133683 | Position location SMDPP message retry mechanism Failures in a message exchange, during a procedure for determining the location of a mobile station, are alleviated by providing a retry mechanism. Upon receipt of a particular failure message, such as the SMS Cause Code 33, rather than abort the location ope... | 11/07/2006 |
| 7133467 | Demodulation apparatus and demodulation method The number of spreading codes multiplexed in a received signal is detected, and switches 4 and 5 are switched to the RAKE demodulation section 2 side if the detected number of spreading codes is less than a predetermined threshold value, and to ... | 11/07/2006 |
| 7127252 | Radio terminal equipment The object of a radio terminal equipment is to achieve a highly accurate channel control and a favorable transmission quality. In order to achieve the object, in the radio terminal equipment, a channel controlling means is given in advance a period which accordingly... | 10/24/2006 |
| 7123578 | Communication system for driving pairs of twisted pair links A communications system includes tow high speed communication links formed by pairs of transformers at either end thereof. A phantom circuit formed by the pairs of transformers is used to distribute power to devices connected to the high speed links. In transmission... | 10/17/2006 |
| 7123648 | Radio relay apparatus A radio relay apparatus including an outdoor relay unit formed of first and second receiving parts equipped out of doors and an indoor relay unit formed of third and fourth receiving parts, and a digital transmission line connecting the outdoor and indoor relay unit... | 10/17/2006 |
| 7116998 | Subtractive multipath delay detection In a RAKE receiver delays associated with multipath signals are determined by subtracting power values associated with sidelobes of a peak value for each of the multipath signals. The determination can be performed in two stages, in the first stage the determination... | 10/03/2006 |
| 7116999 | Mobile communications receiving apparatus and method In a mobile communication receiving apparatus in which signals received on a plurality of receiving paths (branches) are combined by a combiner, correlation between noise signals contained in the signals received on respective ones of the branches is detected by a n... | 10/03/2006 |
| 7110480 | Adaptive array apparatus The control unit 50 calculates weighting factors for one symbol out of every k symbols. During this calculation, the control unit 50 calculates weighting factors for respective inphase and quadrature components of the symbol stored in every I and Q buf... | 09/19/2006 |
| 7106817 | Communication device having delay information calculating function A communication device using orthogonal multiplexing carrier method for determining delay information of received radio waves. In this device, a known signal demodulator performs OFDM demodulation to output demodulated signal, and a divider performs a complex divisi... | 09/12/2006 |
| 7103384 | Apparatus and method for forming a forward link transmission beam of a smart antenna in a mobile communication system A method and apparatus for a base station including an antenna array calculates a direction of a weight vector of a transmission beam to maximize in-phase component power for a common channel signal in a transmission channel signal for transmission to a mobile stati... | 09/05/2006 |
| 7095813 | System and method for the detection and compensation of radio signal time of arrival errors A system and method to reduce-the effects of TOA errors. A mobile unit, generates a correlation pulse when a signal transmitted from a base station is detected. The transmitted signal may be reflected or defracted such that multipath signals arrive at the mobile uni... | 08/22/2006 |
| 7095993 | Frequency auto-correction apparatus for CDMA multipath fading channel An automatic frequency correction (AFC) apparatus used for CDMA multipath fading channels comprises a frequency-offset evaluator, an automatic frequency correction loop filter and a carrier frequency adjuster. The present invention provides a “multipath energy win... | 08/22/2006 |
| 7096132 | Procedure for estimating a parameter of a local maxima or minima of a function A method of and system for estimating a parameter of a local maxima or minima of a function. An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local... | 08/22/2006 |
| 7092431 | Receiver, transmitter, communication system, and method of communication A receiver, comprising a plurality of antennas configured to receive signals that are obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels, the data symbol being transmi... | 08/15/2006 |
| 7088977 | Wireless communication apparatus and wireless communication method A wireless communication apparatus is provided in which a wireless part receives multipath detection information sent from a wireless communication apparatus at the other end (a mobile station, for example) and provides the multipath detection information to a multi... | 08/08/2006 |
| 7088956 | Path search circuit, radio receiver and radio transmitter, utilizing a directional beam A path search circuit according to the present invention has an orthogonal multi-beam forming section 4 for directional reception with a plurality of orthogonal multi-beams orthogonal one to another, correlation-operating sections 61–6M for correlati... | 08/08/2006 |
| 7085537 | System and method for the detection and compensation of radio signal time of arrival errors A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, c... | 08/01/2006 |
| 7082286 | Path searcher using reconfigurable correlator sets A Node-B/base station has a path searcher and at least one antenna for receiving signals from users. The path searcher comprises a set of correlators. Each correlator correlates an inputted user code with an inputted antenna output of the at least one antenna. An an... | 07/25/2006 |
| 7079870 | Compensation techniques for group delay effects in transmit beamforming radio communication In a beamforming communication device, transmit weight vectors are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. The initial transmit weights are computed from signals transmitted by a second communi... | 07/18/2006 |
| 7072669 | Method for localizing the position of a wireless device Systems and methods for localizing the position of a wireless device using a plurality of coordinated highly directional or adaptive antennas to detect signals from the wireless device. Because of the directional nature and/or adaptive processing of the antennas, of... | 07/04/2006 |
| 7068593 | Apparatus and method for synchronizing frequency in orthogonal frequency division multiplexing communication system A frequency synchronization apparatus for an orthogonal frequency division multiplexing (OFDM) communication system includes a radio frequency (RF) receiving module for receiving OFDM signal, an analog/digital (A/D) converter connected to the RF receiving module, th... | 06/27/2006 |
| 7062227 | Method and device for the estimation of a propagation channel from its statistics A method and device to estimate the impulse response h of a propagation channel in a system comprising at least one or more sensors, comprising at least one step for estimating the statistics of the additive noise resulting from the interference and from the thermal... | 06/13/2006 |
| 7058418 | Adaptive array device, wireless base station and cellular telephone Memory (237) stores relative correction values that indicate the differences of transfer characteristics between a) a radio unit made up of transmission circuit (211) and reception circuit (212), and b) a radio unit made up of transmission circu... | 06/06/2006 |
| 7054397 | Mobile communication system having mobile stations and a base station A mobile communication system has a plurality of mobile stations and a base station which includes a plurality of antennas, a frequency shift portion, a combining portion, a receiving portion and a signal processing portion. The antenna receives radio waves transmit... | 05/30/2006 |
| 7046963 | Method and apparatus of signal estimation over generalized fading channel A methodology of signal estimation over the generalized fading channel can be applied to any parameter whose dB value is required to be estimated. The estimator is shown to be asymptotically efficient in a number of samples and the amount of fading. Theoretical and ... | 05/16/2006 |
| 7043272 | Apparatus for forward beamforming using feedback of multipath information and method thereof Disclosed are an apparatus for forward beamforming using a terminal feedback and a method thereof. The base station estimates an angle of arrival (AOA) range of a user signal from reverse link received data and calculates a plurality of beamforming weights steering ... | 05/09/2006 |
| 7043257 | Positioning apparatus, positioning method, and positioning system A positioning apparatus for determining a present position of a mobile station by using radio waves coming from a plurality of base stations arranged within a communication area is provided. The positioning apparatus receives the radio waves coming from the pluralit... | 05/09/2006 |
| 7043252 | Information transmission method for a wireless local network Method for data transmission in a wireless local area network refers to wireless local area networks (WLAN) consisting of a multitude of transceivers capable of establishing communication with one another (i.e. operating in a peer-to-peer mode). Implies the determin... | 05/09/2006 |
| 7039119 | Method and apparatus for combining transponders on multiple satellites into virtual channels A satellite communications system provides an information channel between remotely located transmitters and receivers. A virtual satellite system provides the same service, but divides the signal either in power or in data content into subchannels such that any part... | 05/02/2006 |
