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| Number | Title | Issue Date |
| 8121565 | Method and apparatus for receiving data using multiple antennas in a communication system A method and apparatus for receiving data using multiple antennas in a communication system are provided. A received signal-combining scheme is determined according to the strength of an interference signal included in the signals received from the antennas. The sig... | 02/21/2012 |
| 8107906 | Transceiver with receive and transmit path performance diversity Methods and apparatus for implementing a wireless communication transceiver having receive path performance diversity. The transceiver implements a plurality of signal paths that can be configured as space diversity receive paths. Each of the plurality of signal pat... | 01/31/2012 |
| 7945225 | Medium loss high power IBOC combiner A method and apparatus are disclosed for combining digital sidebands with an FM analog signal for IBOC transmission by a single antenna. Specifically, a high power filter combiner for combining an FM analog and a digital signal of the same channel, or frequency, is ... | 05/17/2011 |
| 7885621 | Receiver and electronic apparatus using the same A receiver according to the present invention includes a first receiving (RCV) quality detector and a second RCV quality detector connected before a combining unit. The second RCV quality detector determines a quality of a signal output from at least one of a first ... | 02/08/2011 |
| 7865155 | Wireless communication system with signal selection and combination Portion-by-portion selection and/or combination of signals received from multiple base transceiver stations (BTSs) is used to improve the quality of reception in cellular communication systems. For any particular frame, bit, symbol, or chip, the highest-quality copy... | 01/04/2011 |
| 7630696 | Multi-band RF combiner An RF (radio frequency) combiner utilizes RF filtering cavities and transmission paths incorporated into an RF impervious material. This allows traditional stand-alone multiplexers to be integrated into a single device without using signal loss-inducing cables and c... | 12/08/2009 |
| 7599672 | Millimeter-wave-band radio communication method in which both a modulated signal and an unmodulated carrier are transmitted to a system with a receiver having plural receiving circuits A receiver receives an RF-band modulated signal transmitted from a transmitter, as well as an un-modulated carrier also transmitted from the transmitter and having a phase noise characteristic coherent with that of the modulated signal, and a product of the two comp... | 10/06/2009 |
| 7596359 | Receiving apparatus, transmitting apparatus and transmitting/receiving system A receiving apparatus is for selecting and receiving a radio signal in a frame structure having an information body part including at least information body and an additional part including information for receiving field intensity measurement by using a plurality o... | 09/29/2009 |
| 7433384 | System and method for received signal prediction in wireless communications system Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Ra... | 10/07/2008 |
| 7433659 | Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first set of N channels and a second set of M channels (the M channels bein... | 10/07/2008 |
| 7433660 | Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first set of N channels and a second set of M channels (the M channels bein... | 10/07/2008 |
| 7433414 | Intelligent array radio architecture A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm. ... | 10/07/2008 |
| 7430190 | Systems and methods for resource allocation to multiple antenna arrays for maintaining a constant bit rate (CBR) channel A wireless communication system configured for the efficient allocation of resources is provided. The wireless communication system can include a transmit system having a first set of one or more antennas each configured to transmit a data signal over a region to a ... | 09/30/2008 |
| 7412218 | Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first set of N channels and a second set of M channels (the M channels bein... | 08/12/2008 |
| 7409193 | Predistortion circuit for a transmit system Systems and methods related to amplifier systems which use a predistortion subsystem to compensate for expected distortions in the system output signal. A signal processing subsystem receives an input signal and decomposes the input signal into multiple components. ... | 08/05/2008 |
| 7403798 | Wireless base system, and directivity control method Antennas in an entire radio base station system are divided into two antenna groups so that each group has antennas in the number that allows convergence of reception directivity using a reference signal length. Reception weight vector calculators (112, 212) ... | 07/22/2008 |
| 7400867 | Radio broadcast receiver A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a reception signal of a sub antenna is less than a predetermined threshold valu... | 07/15/2008 |
| 7398067 | Multiple intermediate frequencies receiver and a method thereof Embodiment of the invention provides a receiving device having an intermediate frequency section to produce first and second intermediate frequency signals based on first and second received radio frequency signals, such that said intermediate frequency signals are ... | 07/08/2008 |
| 7394858 | Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath c... | 07/01/2008 |
| 7392025 | Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first set of N channels and a second set of M channels (the M channels bein... | 06/24/2008 |
| 7386029 | Reception device and reception method At noise component addition section 105, a noise equivalent value equivalent in size to noise component is calculated using a constant which is dependent on a difference of spreading factors between a common pilot channel and packet channels, and at correlati... | 06/10/2008 |
| 7369834 | Impedance-matched IQ network for an image rejection circuit An impedance-matched IQ network includes a phase shift circuit and a back termination. The phase shift circuit includes an in-phase mixer port for receiving the in-phase signal, a quadrature-phase mixer port for receiving the quadrature phase signal, a termination p... | 05/06/2008 |
| 7369631 | Symbol synchronizer for software defined communications system signal combiner A symbol synchronizer (100) is provided for a software-defined communications system (10). The symbol synchronizer (100), when integrated into either a pre- or post-detection diversity signal combiner (108, 208), enables highly accurate s... | 05/06/2008 |
| 7369826 | Method for monitoring broadcast signals at alternative frequencies and gain control unit Many broadcast stations transmit their programs via a variety of different frequencies. The invention relates to monitoring alternative frequencies during the reception of a broadcast signal at a present frequency. Whenever the broadcast signal at an alternative fre... | 05/06/2008 |
| 7366143 | Diversity receiving radio base station with high reception sensitivity and high time slot utilization efficiency The present invention aims to provide a radio base station that has equivalently high reception sensitivity without increasing the number of antenna elements while keeping the utilization efficiency of time slots high. The radio base station comprises a radio unit | 04/29/2008 |
| 7362815 | Time-reversal block transmit diversity system for channels with intersymbol interference and method A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the... | 04/22/2008 |
| 7363016 | Diversity receiving apparatus and method A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second signal received by a second antenna to generate a phase-shifted signal... | 04/22/2008 |
| 7342875 | Space-time coded OFDM system for MMDS applications A communications system includes a base station that is configured to transmit a signal that is modulated according to a predetermined modulation scheme and an orthogonal frequency division multiplexing scheme, wherein the signal is encoded using space-frequency cod... | 03/11/2008 |
| 7339979 | Adaptive beamforming methods and systems that enhance performance and reduce computations Wireless communication systems and methods are provided that a) enable progressive beamforming with antenna arrays and subarrays, b) provide current and delayed versions of data-carrying signals, and c) provide time-of-arrival of data-carrying signals. The progressi... | 03/04/2008 |
| 7340016 | Equalizers for multi-branch receiver A multi-branch receiver comprises a plurality of signal branches including branch filters to filter respective branch input signals and to produce corresponding branch output signals, a combiner to combine the branch output signals to produce a combined baseband sig... | 03/04/2008 |
| 7330701 | Low complexity beamformers for multiple transmit and receive antennas Beamforming systems having a few bits of channel state information fed back to the transmitter benefit from low complexity decoding structures and performances gains compared with systems that do not have channel state feedback. Both unit rank and higher rank system... | 02/12/2008 |
| 7315730 | Architecture for a receiver front end having dual output low noise amplifier driving separate pre-selectors coupled to a transformer for single ended output An architecture for a receiver front end utilizes a dual output low noise amplifier (102) driving separate, fixed preselectors (104, 106) coupled to a transformer (108) to generate a single ended output (113). A pair of blocks coupled in ... | 01/01/2008 |
| 7313372 | Stable process induced correction bias circuitry for receivers on single-ended applications A second single-ended receiver having a first stage for receiving an input signal and outputting a pair of corresponding output signals, and a second stage for receiving the pair of output signals and outputting a corresponding single output signal. First and second... | 12/25/2007 |
| 7310503 | Diversity reception device and diversity reception method The circuit size of a diversity receiver for an orthogonal frequency division multiplexing signal is reduced, and the diversity effect is increased, by providing a power ratio comparator that calculates a difference value as a ratio of powers derived from channel es... | 12/18/2007 |
| 7310394 | LMMSE-based RAKE receiver with channel tap assignment Methods of recovering data in a received signal sent in a communications media are disclosed. Composite channel impulse responses are first estimated. Channel-tap locations are then assigned to suppress the interference noises by sequential search schemes or heurist... | 12/18/2007 |
| 7310386 | Radio receiver utilizing a single analog to digital converter A radio receiver includes a low noise amplifier, intermediate frequency mixing stage, complex bandpass filter, a single analog to digital converter, a 1st digital mixing module, and a 2nd digital mixing module. The low noise amplifier is operab... | 12/18/2007 |
| 7302244 | Antenna diversity receiver An antenna diversity receiver comprises a zero-IF receiver connected to two antennas (102a, 102b) via switches (532, 534). Simultaneous measurement of signal qualities from both antennas is possible by routing signals from the firs... | 11/27/2007 |
| 7299012 | Circuit to add and subtract two differential signals An electrical circuit to add and subtract differential input signals may be implemented using distributed differential transmission lines having a length substantially equal to one quarter of a wavelength of the differential input signals according to an effective e... | 11/20/2007 |
| 7299017 | Communication method, receiver and base station A multi-user receiver which uses at least two antenna elements and in which the influence of interference is reduced, the receiver comprises: means (200) for pre-filtering a wideband antenna signal, the pre-filtering means being determined on the basis of a s... | 11/20/2007 |
| 7295861 | Combined Low-IF/direct down conversion baseband architecture for 3G GSM/WCDMA receivers A radio receiver for receiving signals of at least two different communication standards, including a narrow band signal having a narrow bandwidth and a wide band signal having a wide bandwidth, is provided. The receiver comprises a shared radio frequency (RF) front... | 11/13/2007 |
