Class / Patent application number | Description | Number of patent applications / Date published |
455278100 | Combined with noise or interference elimination | 20 |
20080227422 | APPARATUS AND METHOD FOR INTERFERENCE CANCELLATION IN MULTI-ANTENNA SYSTEM - An apparatus and method for interference cancellation in a multi-antenna system are provided. A transmission apparatus includes a channel identifier, a scheduler, an interference canceller, and a transmitter. The channel identifier identifies channel information of each of a plurality of receiving ends located in a service area and neighbor cell interference information on each receiving end. The scheduler selects at least one receiving end. The interference canceller precodes transmitted signals in order to cancel interference between receiving ends located in the same cell and neighbor cell interference. The transmitter transmits the precoded transmitted signals to the selected at least one receiving end. | 09-18-2008 |
20080248773 | APPARATUS AND METHOD FOR INTERFERENCE CANCELLATION IN multiple-antenna COMMUNICATION SYSTEM - An apparatus and method for interference cancellation in multiple-antenna communication system is disclosed. Accordingly, a receiver of a multiple-antenna communication system cancels interference by selecting either a multiple-symbol processing scheme or a single-symbol processing scheme depending on a signal type, thereby improving performance of the communication system. | 10-09-2008 |
20080293371 | Radio Communication Device - A spatial filtering adaptable for an interference wave that appears unsteadily can be implemented and also an interference canceling ability can be increased even in a condition that the interference wave does not steadily exist. At a time of non-active communication, the signals from a plurality of interference source radio communication devices | 11-27-2008 |
20090191832 | SYSTEM AND METHOD FOR ANTENNA SELECTION - Systems and methods that provide antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a system that selects N antenna elements in an M-antenna-element transmitter or an M-antenna-element receiver, in which N is less than M, may include, for example, M antenna elements in the M-antenna-element transmitter or the M-antenna-element receiver; N RF chains; and a switch coupled to the N RF chains. The M-antenna-element receiver may determine a bit error rate for each possible N antenna element subset of the M antenna elements. The M-antenna-element receiver may determine the particular N antenna element subset with a lowest bit error rate. In response to the determination of the particular N antenna element subset with the lowest bit error rate, the switch may couple the N RF chains to the particular N antenna element subset with the lowest bit error rate. | 07-30-2009 |
20090239494 | METHODS AND APPARATUS FOR COMBINING SIGNALS FROM MULTIPLE DIVERSITY SOURCES - A method for combining signals coming from multiple diversity sources may include performing maximal-ratio combining (MRC) based equalization and combining for receiver antenna diversity. The method may also include performing MRC-based equalization and combining for repetition diversity. The method may also include performing MRC-based equalization and combining for duplication diversity. The MRC-based equalization and combining for receiver antenna diversity, the MRC-based equalization and combining for repetition diversity, and the MRC-based equalization and combining for duplication diversity may each be performed separately. | 09-24-2009 |
20100144302 | METHOD AND APPARATUS FOR DETECTING SIGNAL - In a method for detecting a signal in a multi-input multi-output wireless communication system that receives signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, a detection order for detecting the transmission signals received through the reception antennas is determined on the basis of a cofactor determinant of components constituting a channel matrix representing characteristics of channels between the transmission antennas and the reception antennas. In addition, the transmission signal is detected from the signals received through the reception antennas in accordance with the determined detection order. | 06-10-2010 |
20100190460 | PRE-PROCESSOR FOR RECEIVER ANTENNA DIVERSITY - A dual-branch decorrelator receiver is provided in which decorrelation is performed with a simple addition and subtraction. The same receiver finds application in pre-processing signals that may not be correlated. | 07-29-2010 |
20100190461 | METHOD FOR REMOVING THE COUPLING AND CORRELATION OF ANTENNAS, AND WIRELESS DEVICE HAVING THE FUNCTION OF REMOVING THE COUPLING AND CORRELATION OF ANTENNAS - A wireless device, which employs the method and function of removing the coupling and correlation of antennas, picks up the noise components released from inside the device together with the current induced to a second antenna. The wireless device then controls the amplitude and phase of the pickup signal so as to optimize the reception quality signal for received signal, and additively combines it with the signal received from the first antenna. The coupled component, which is induced from the first antenna to the second antenna, is cancelled together with the noise component, thus mainly cancelling the largest cause of desensitization. This results in the maximization of the receiving sensitivity. | 07-29-2010 |
20100210235 | METHOD AND APPARATUS FOR RECEIVER DIVERSITY CONTROL IN WIRELESS COMMUNICATIONS - Receiver diversity in a wireless device is controlled in response to operating conditions, transmission requirements, and control settings. The control of diversity reduces power consumption by enabling receive diversity on given conditions. Operating conditions, transmission requirements, and control settings are used separately or used in conjunction to determine whether benefits of multi-antenna receive diversity, such as higher link capacity, higher data throughput, lower transmit power, and lower error rate, warrant the higher power cost of the diversity. | 08-19-2010 |
20100248673 | Method and Device for Radio Reception Using a Plurality of Antennas - The invention relates to a method for radio reception using a plurality of antennas and to a receiver for radio transmission using a plurality of antennas. In a receiver for radio transmission with multiple antennas of the invention, 3 antennas are connected to the input ports of a device for transmission which transmits the electrical signals stemming from the 3 antennas to the input terminals of a multiple-input-port and multiple-output-port amplifier having 3 input ports and 3 output ports. Each output port of the multiple-input-port and multiple-output-port amplifier is connected to the input of an analog processing and conversion circuit which outputs digital signals. The output of each analog processing and conversion circuit is connected to an input of a multiple-input signal processing device, whose output is connected to the destination. | 09-30-2010 |
20110065404 | PORTABLE RADIO - There is provided a portable radio that enables simultaneous input of high frequency signals from a plurality of built-in antennas and performance of optimum receiving operation. | 03-17-2011 |
20120083234 | Receiver - A receiver includes an antenna unit that is able to receive a transmission signal from a subject alternately at different reception levels. A wave detection unit wave-detects the transmission signal to generate a detection signal. The detection signal has a signal level that becomes fixed in accordance with the transmission signal when the antenna unit receives the transmission signal at a reception level greater than or equal to a reception limit, and the signal level of the detection signal becomes non-fixed when the antenna unit receives the transmission signal at a reception level that is less than the reception limit. A correction unit removes, when the detection signal includes a fixed value session and a non-fixed value session, the non-fixed value session and corrects the signal level of the non-fixed value session to a level equivalent to the signal level of a fixed value session. | 04-05-2012 |
20120088465 | NOISE CANCELLER, INFORMATION PROCESSING APPARATUS AND NOISE REMOVAL METHOD - A noise canceller, information processing apparatus and noise removal method for implementing miniaturization and allowing noise reduction are provided. A generation unit | 04-12-2012 |
20120252392 | Methods and Devices for Reducing Radio Frequency Interference - Devices and methods for selectively reducing interference in wireless signals through field nulling and signal cancelling by signal agnostic, intrinsically stable, analytic means. | 10-04-2012 |
20130035052 | Circular Antenna Array for Satellite Communication Interference Rejection - An antenna array system and method is provided for reducing interference from a source moving relative to the antenna array system. The antenna array system includes a receiver and a plurality of antenna array elements arranged in a planar array. Each of the plurality of antenna array elements is in electrical communication with the receiver and in a locationally fixed position relative to the receiver. The plurality of antenna array elements receives a desired signal and interference from the source moving relative to the antenna array system. The receiver is configured to detect a presence of the interference. In response to the detection of the presence of the interference, the receiver is further configured to steer a deep antenna-pattern null in a direction of the interference. | 02-07-2013 |
20130065548 | INTERFERENCE REDUCTION FOR MULTIPLE SIGNALS - The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other shared interference, where the one or more radio signals can be separated from the first radio signal. All received signals are coupled to the same adaptive array or adaptive filter to reduce multipath or other shared interference of the first radio signal, which reduces multipath and other shared interference in the other radio signals before they are separated and processed by their respective receivers, or the individual radio signals are separated before the first signal enters the adaptive array or adaptive filter and each of the other signals coupled to an individual associated adaptive array or adaptive filter slave weighting network with weights slaved to the weights of the adaptive array or adaptive filter of the first signal to reduce the multipath and other shared interference in all the signals. | 03-14-2013 |
20130288632 | MULTI-ANTENNA SYSTEM - An antenna system is disclosed which includes a frontend portion, a backend portion, a feed line for connecting the frontend portion and the backend portion with each other, and a control unit for controlling the frontend portion and/or backend portion. The frontend portion includes multiple antennas that supply antenna signals and at least one combiner network that connects the antennas to the feed line. The backend portion includes multiple receivers and at least one splitter network that connects the feed line to the receivers. The control unit is configured to evaluate the reception quality and adjust the at least one combiner network and/or splitter network dependent on the reception quality. The at least one combiner network combines the signals from at least two antennas in different, non-overlapping frequency ranges to form at least one combined signal thereof. | 10-31-2013 |
20140187187 | RADIO FREQUENCY INTERFERENCE MITIGATION - A computing device including a wireless communication system is provided herein. The computing device includes a plurality of antennas coupled to the wireless communication system. The computing device also includes a pattern controller to shape an antenna pattern of the plurality of antennas to point a null of the antenna pattern toward a Radio Frequency Interference (RFI) source of the computing device. | 07-03-2014 |
20140235190 | METHODS AND DEVICES FOR REDUCING RADIO FREQUENCY INTERFERENCE - Devices and methods for selectively reducing interference in wireless signals through field nulling and signal cancelling by signal agnostic, intrinsically stable, analytic means. | 08-21-2014 |
20150017940 | APPARATUS AND METHOD FOR ADAPTIVE RECEIVE DIVERSITY USING LINK QUALITY IN WIRELESS COMMUNICATIONS - Aspects of the present disclosure relate to apparatuses and methods for performing adaptive receive-diversity (RxD) to improve power consumption using multiple antennas/receivers. In one aspect, a first receive-diversity (RxD) state is enabled at an access terminal utilizing two receive chains for a communication link. Link quality metrics corresponding to the communication link are determined. The access terminal selectively switches from the first RxD state to a second RxD state utilizing three or more receive chains dependent upon the link quality metrics, such that the energy per bit of the second RxD state is more energy efficient than the energy per bit of the first RxD state. | 01-15-2015 |