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| Number | Title | Issue Date |
| 8050639 | Multi-antenna communication apparatus Reception signals received by first to fourth antennas 11 to 14 are sequentially selected one by one repeatedly in accordance with first to fourth switches 31 to 34 being controlled by first to fourth switch control circuits 41 to ... | 11/01/2011 |
| 8027651 | Method and apparatus for removing DC offset in a direct conversion receiver A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive si... | 09/27/2011 |
| 7877068 | Semiconductor device A demodulation signal is generated by provision of a demodulation signal generation circuit to the semiconductor device capable of wireless communication and by obtainment of a difference between voltages having opposite polarities by the demodulation signal generat... | 01/25/2011 |
| 7856216 | Diversity receiver and gain adjusting method therefor Reception levels are measured in respective branches to compare the results of the measurements with one another to select the result of the measurement of a maximum reception level which is the highest reception level. The gains of variable gain amplifiers (6, 7... | 12/21/2010 |
| 7747233 | Apparatus and method for selecting an antenna in a digital broadcast receiving terminal An apparatus and method for supplying information so that power consumption in a digital broadcast receiving terminal can be reduced and a user can use an appropriate antenna depending on a situation. The digital broadcast receiving terminal includes an external ant... | 06/29/2010 |
| 7630695 | Receiver signal strength indicator A system and method are provided for measuring the amplitude of a received signal. The method receives an analog input signal, and compares a peak value of the analog input signal to a threshold level. Threshold transition data is generated, and the threshold level ... | 12/08/2009 |
| 7440520 | System and method for terrestrial high-definition television reception An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characte... | 10/21/2008 |
| 7440507 | Turbo channel estimation for OFDM systems A system and method for estimating a channel in a wireless receiver is disclosed. The method preferably applies to a communication system using the OFDM standard. The method comprises receiving a block of “n” transmitted symbols, the symbols including pilot symb... | 10/21/2008 |
| 7436793 | System and method for effectively performing a transmit power adjustment procedure A system and method for effectively performing a transmit power adjustment procedure in a wireless network includes a forward receiver that monitors a wireless forward link for forward data that is transmitted over the wireless forward link by a forward transmitter.... | 10/14/2008 |
| 7421261 | Blind detection The present invention relates to a blind detection of a received signal having at least one property, which initially is unknown to the receiver, however, limited to a finite set of alternatives ({p1, p2, . . . , pm}). According to t... | 09/02/2008 |
| 7400872 | Radio receiver for selecting appropriate diversity antennas by comparing correlation values and a method for the same In the diversity receiver, the RF switcher switches the received signals to supply them to the RSSI power detector equipped with diversity function. Subsequently, the RSSI power detector with diversity function feeds the RF switcher with an antenna switching signal.... | 07/15/2008 |
| 7395043 | Data receiver adaptive to RSSI and a method of determining its threshold A modem generates a new RSSI threshold value in response to a flag signal representing the quality of the threshold value indicated by the result of error detection supplied from one monitor, and supplies the generated threshold value to another monitor. The RSSI th... | 07/01/2008 |
| 7386277 | Communication system and method for increasing communication efficiency A mobile communication system capable of increasing communication efficiency and a method therefor are provided, including a receiver for grouping n MCS levels (where n>0) into continuous m MCS levels (where n>m>0) according to the quality of a data channel for tran... | 06/10/2008 |
| 7369832 | Receiving diversity apparatus and method of mobile station for high data rate type mobile communication system A receiving diversity apparatus and method for a mobile station in an HDR mobile communication system measures C/I values of pilot channels on respective antennas, measures a C/I value of in-phase combined pilot channel, and then selectively performs one of a select... | 05/06/2008 |
| 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 |
| 7359336 | Simultaneous broadcasting receiver A simultaneous broadcasting receiver of this invention receives simultaneously both analog and digital broadcasts transmitting an identical content, changes input systems according to a reception status of the digital broadcast, and is configured in such a way that ... | 04/15/2008 |
| 7356071 | Method and apparatus for estimating signal-to-noise ratio based on dedicated physical channel pilot symbols The present invention is related to a method and apparatus for estimating signal-to-noise ratio (SNR) based on dedicated physical channel (DPCH) pilot symbols in a wireless communication system. A receiver receives a DPCH transmission and a despreader despreads the ... | 04/08/2008 |
| 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 |
| 7342943 | Radio base station and method of controlling radio communications The present invention provides a radio base station using the conventional downlink transmit diversity which can compensate for the degradation of transmission quality even when a plurality of users (mobile terminals) share a single time slot using a code division m... | 03/11/2008 |
| 7340253 | IP-based distributed wireless access network architecture for CDMA networks A system that enables end-to-end networking within CDMA oriented networks. Several base stations operating within the CDMA oriented network simultaneously receive data from the same mobile unit. A distributed algorithm operating within each of the base stations moni... | 03/04/2008 |
| 7333787 | Reducing interference in high speed home network using signal processing A method includes receiving a plurality of signal inputs from a plurality of antenna elements, determining a signal strength of the plurality of signal inputs, receiving a selection of a reduced power consumption and determining a combination of the plurality of sig... | 02/19/2008 |
| 7333813 | Methods and devices for assigning mobile devices to base stations in the presence of interference Mobile devices are assigned to their correct base stations after taking into consideration interference from all other mobile devices. The resulting assignments are more efficient than previous assignments. In addition, transmit power levels are assigned after each ... | 02/19/2008 |
| 7330695 | Bus powered wireless transmitter A process control system utilizes wireless transceivers to divorce the field devices from traditional wired network topologies. By providing field devices with wireless transceivers and shared wireless transceivers for adapting wired field devices, the field device ... | 02/12/2008 |
| 7330707 | Hetrodyne receiver and IC In a heterodyne receiver, the effect of an image interference signal that occurs in a case where a low intermediate frequency is used is alleviated. Circuits (12I), (12Q), (13I), (13Q), and (14) are provided to switch a heterodyne ... | 02/12/2008 |
| 7324470 | FDD/CDMA receiver having transmission antenna control circuit An FDD/CDMA transmission/reception system includes a CDMA transmitter and a CDMA receiver. The CDMA transmitter includes a plurality of transmission antennas, signal transmission units for transmitting transmission signals weighted by different values to the respect... | 01/29/2008 |
| 7324478 | Apparatus and method for deciding access system based on WLAN signal strength in WLAN/mobile network interworking system, and mobile terminal therefor The present invention discloses an apparatus and method for deciding an access system based on WLAN signal strength in a WLAN/mobile phone network interworking system, and a mobile terminal therefor. The method for deciding the access system based on the WLAN signal... | 01/29/2008 |
| 7324794 | Phase combining diversity Embodiments of methods of receiving transmitted signals are disclosed. The methods include a first antenna receiving a second signal, a second antenna receiving a second signal, adjusting a phase relationship between the first signal and the second signal, combining... | 01/29/2008 |
| 7315733 | Antenna-switching diversity receiver capable of switching antennas without deterioration of reception characteristic even when applied to the CDMA communication method An antenna-switching diversity receiver is capable of switching antennas without bringing about deterioration of reception characteristics even when applied to the CDMA communication method. A TFCI bit decoding/determination unit decodes TFCI bits that have been ext... | 01/01/2008 |
| 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 |
| 7277686 | Antenna and frequency diversity receiving apparatus An apparatus determines an optimal antenna and frequency combination by selecting the optimal antenna from among a plurality, N, of antennas associated with a receiver and also selects the optimal frequency from among a plurality, M, of alternative receiving frequen... | 10/02/2007 |
| 7277679 | Method and apparatus to provide multiple-mode spatial processing to a terminal unit Methods and apparatuses, including computer program products, for spatial processing in a remote terminal unit. One embodiment is a wireless remote terminal receiver in a wireless terminal unit for operation in a wireless communication system. The wireless remote te... | 10/02/2007 |
| 7260370 | Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming operation to form an output signal. The beam forming operation deter... | 08/21/2007 |
| 7251503 | Diversity receiving apparatus and wireless receiving apparatus using the same During all or part of a time period during which pattern signals are received, a diversity receiving apparatus allows a gain control section to fix the gain of a gain amplifier section, allows an antenna switching section to sequentially switch the selection of ante... | 07/31/2007 |
| 7248843 | Antenna selection system and method A system and method for wireless communication. The system can include a transmitter that transmits a data signal having a time period without data transmission. The system can also include a receiver including a first antenna, a second antenna, a switch that activa... | 07/24/2007 |
| 7224980 | Radio system A stationary device 20 sends a portable-device finding signal to a portable device 10 from a plurality of stationary-device side antennae 24 and 25, which are located at different positions. Upon receipt of the portable-device finding sig... | 05/29/2007 |
| 7224726 | System and method for terrestrial high-definition television reception An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characte... | 05/29/2007 |
| 7212832 | Communication system switching method, and terminal device using this method A W-LAN communication unit, a personal handyphone communication unit and an EV-DO communication unit include communication functions corresponding to their communication systems. A W-LAN quality measurement unit detects a value corresponding to RSSI, which is the re... | 05/01/2007 |
| 7203471 | System and method for selectively utilizing an attenuation device in a two-way radio receiver based on squelch detect and radio signal strength indication (RSSI) A system and method used for controlling an attenuator in a two-way communication device (100, 200) includes the steps of measuring (211) a relative signal strength indication (RSSI) at the input of the two-way communications device. The RSSI measureme... | 04/10/2007 |
| 7197091 | Direct conversion receiver with direct current offset correction circuitry A direct conversion circuit that includes an in-phase and quadrature-phase feedback path that reduces Direct Current (DC) offset. Each feedback path includes a compensating mixer that generates an error correction voltage that is passed through a loop gain circuit a... | 03/27/2007 |
| 7187912 | Apparatus and method for wireless local area network (LAN) antenna selection A radio frequency transceiver for a wireless local area network (LAN) may have two or more antennae. An active antenna that delivers a data-bearing signal having a signal quality at least as good as any of the antennae may be selected based upon measurements of the ... | 03/06/2007 |
