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| Number | Title | Issue Date |
| 8055221 | Method of providing video call service in mobile station in a weak signal environment Improving the audio QoS of a video call service in a weak signal environment is accomplished. To do this, even if data is damaged in a weak signal environment during a video call using a mobile station in the weak signal environment, an audio call is preferentially ... | 11/08/2011 |
| 7689186 | Frequency band allocation device and method A frequency band allocation device is disclosed. The frequency band allocation device comprises a frequency band selection unit for selecting usable frequency bands from a dedicated frequency band, a registered frequency band and an unlicensed frequency band; and a ... | 03/30/2010 |
| 7483682 | Dual-band radio enabled lapel mounted audio and signal handling system and method An apparatus for communicating using multiple channels. The apparatus includes a first radio receiver and a controller. The first radio receiver is configured to produce a first receive signal in response to a first radio frequency signal in a first frequency band. ... | 01/27/2009 |
| 7430420 | Cell selection and inter-frequency handover The present invention provides a method and an apparatus for controlling a communications system that includes a mobile wireless device, a first and a second base station and a radio network controller. The communications system may allocate frequency bands to users... | 09/30/2008 |
| 7421262 | Tuning method and apparatus for reducing interference between adjacent channels A tuning method comprises: detecting a fundamental intermediate frequency IF0 of a channel to be received; determining whether the fundamental intermediate frequency IF0 is affected by an adjacent channel; when the fundamental intermediate freq... | 09/02/2008 |
| 7415275 | Frequency selection apparatus, a mobile communications system, and a multi-band frequency resource management method A frequency selection apparatus, a mobile communications system, and a multi-band resource management method are disclosed. The frequency selection apparatus includes an acquisition unit configured to collect environmental informat... | 08/19/2008 |
| 7415258 | Television tuner capable of reducing gain deviation when low-band or high-band signal is received A television tuner includes: low band and high-band receiving units; a mixer that frequency-converts low-band television signals from the low-band receiving unit or high-band television signals from the high-band receiving unit; first and second switching diodes tha... | 08/19/2008 |
| 7403755 | Searching receiver A monitoring receiver accepts program preferences from an operator. When active, the receiver automatically monitors alternate frequencies for programming that matches the program preferences, alerts the operator when a match is found, and may switch to a preferred ... | 07/22/2008 |
| 7392026 | Multi-band mixer and quadrature signal generator for a multi-mode radio receiver A multi-band high gain mixer and quadrature signal generator allows a receiver system to receive signals at multiple frequency bands without requiring significant hardware duplication. A single mixer directly receives any of three communication frequency bands such ... | 06/24/2008 |
| 7383024 | Multi-band handset architecture Architectures for a class of multi-band handsets are described. These architectures separate linearity requirements from isolation requirements and reduce the number of throws on switches requiring linearity through the use of distributed switching, filter structure... | 06/03/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7352824 | Multilevel pulse position modulation for efficient fiber optic communication Decreasing the average transmitted power in an optical fiber communication channel using multilevel amplitude modulation in conjunction with Pulse Position Modulation (PPM). This multilevel PPM method does not entail any tradeoff between decreased power per channel ... | 04/01/2008 |
| 7349034 | Television tuner using integrated circuit An integrated circuit is provided with a power supply terminal and an external circuit connecting terminal which is DC insulated from an internal high-frequency circuit and is connected to an external circuit. An interface is provided with an address identifying cir... | 03/25/2008 |
| 7343140 | Tuner A tuner is provided for selecting, independently of each other, a plurality of radio frequency channels for simultaneous reception. The tuner comprises a plurality of up converters whose outputs are combined in a combiner. Each up converter operates independently of... | 03/11/2008 |
| 7340237 | Dual-band active filter The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the dual-band active filter and for having a band-pass filtering response; a f... | 03/04/2008 |
| 7319849 | Radio-frequency tuner with differential converter A system for tuning a radio-frequency signal includes a first input path, a second input path, a common reference generator, a selector, a mixer, and a filter. The first input path and the second input path propagate a first single-ended input signal and a second si... | 01/15/2008 |
| 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 |
| 7305250 | Apparatus and method for simultaneously performing a TV reception function and a calling function in a mobile phone A method and apparatus is provided to simultaneously perform a TV reception function and a calling function in a multimode mobile phone supporting two or more communication services. The apparatus comprises a first RF switch separating a received signal into N commu... | 12/04/2007 |
| 7302243 | Method and apparatus for detecting a radio frequency to which a broadcast receiver is tuned A method and apparatus is disclosed for detecting the frequency to which a broadcast receiver is tuned. In one embodiment, a sensing unit emits a chirp signal over a range of broadcast bands and monitors the output of the radio receiver to detect the frequency to wh... | 11/27/2007 |
| 7292834 | Switchable high frequency bandpass filter A switchable high frequency bandpass filter includes an input node and an output node, a switchable LC resonator, and a switch signal input interface circuit. The switchable LC resonator is coupled between the input node and the output node for providing a plurality... | 11/06/2007 |
| 7290032 | Broadcast communication system and method thereof in a point-to-multiport communication system In a point-to-multipoint system, the first communication processing apparatus generates a signal to inquire of the second communication processing apparatus about languages used in the second terminals and transmits the signal to the second communication processing ... | 10/30/2007 |
| 7289784 | Active tunable filter circuit An active tunable filter circuit for use as an integratable active filter in a mobile radio apparatus, comprises an active amplifier circuit (A) including a reactive feedback network including a first tunable element (L1) set to pass with amplification a want... | 10/30/2007 |
| 7286794 | Method and system for joint broadcast receiving and cellular communication at mobile terminal or device without service control Methods and systems for communicating information via a plurality of different networks are disclosed herein. Aspects of the method may comprise receiving broadcast information in a mobile terminal via a VHF/UHF broadcast communication path. Cellular information in ... | 10/23/2007 |
| 7274918 | Apparatus for automatically finding an am radio program The invention relates to a method for automatically finding an AM radio program, by which an AM radio receiver is tuned through in discrete steps, such that, for each set AM frequency, the reception quality at the currently set AM frequency is determined, the field ... | 09/25/2007 |
| 7266388 | Transmitting circuit and communication terminal unit therewith When a signal of GSM 900 frequency band is transmitted, a bias voltage setting circuit sets an optimum bias voltage for the GSM 900 frequency band to a first stage amplifier and a second stage amplifier. The transmission signal is amplified by the two amplifiers. A ... | 09/04/2007 |
| 7263149 | Apparatus and method for generating a distributed clock signal The present invention provides a method and apparatus for synchronizing signal transfers between two clock domains, where the clock domains have a gear ratio relationship. A gear ratio means that the clocks are related by a ratio, such that each clock has a differen... | 08/28/2007 |
| 7259800 | Television signal receiver with a universal output for surface-acoustic wave filters of different types The invention relates to a television signal receiver comprising a radio-frequency tuner (1) and at least one subsequent surface-acoustic wave filter (2), in which the radio-frequency tuner (1) filters a RF television signal applied to its input... | 08/21/2007 |
| 7227591 | Apparatus and method for receiving television and radio broadcasting signals using a single tuner There is provided a combined TV and FM radio receiver for selectively receiving TV and FM radio signals via a single tuner using a digital intermediate frequency (IF) stage. The receiver includes a tuner that selects TV band or FM radio band signals and converts the... | 06/05/2007 |
| 7224948 | Transmitter and radio communication terminal using the same There are provided a transmitter and a wireless communication terminal apparatus using the same for solving a problem of undesired spurs due to harmonics of an output signal of a frequency synthesizer, and further solving a problem of the undesired spurs occurring w... | 05/29/2007 |
| 7218900 | Radio transmitter and receiver A broadband signal radio communication device which is capable of transmitting audio signals in a frequency band wider than a normal transmission band from 0 to 4 kHz in a radio system such as Bluetooth which employs a radio communication link through weak radiowave... | 05/15/2007 |
| 7212580 | Multi-level signal clock recovery technique Clock recovery of a multi-level (ML) signal can be performed in a two-step process. First, the transitions within the ML signal can be detected by a novel transition detector (TD). And second, the output of the TD circuit can comprise a pseudo-non-return-to-zero (pN... | 05/01/2007 |
| 7209726 | Switch in UHF bandpass By using ICs with combined inputs for the VHF-high bandpass circuit and the UHF bandpass circuit, undesirable resonances occur which are caused by one of the tuned circuits. The problem is solved by providing a switching means for decoupling the UHF bandpass circuit... | 04/24/2007 |
| 7187239 | Multi-band low noise amplifier A multi-band low noise amplifier capable of operating in a plurality of band modes includes a plurality of input amplifiers respectively corresponding to the plurality of band modes and an output amplifier. Each input amplifier includes a receiving port for receivin... | 03/06/2007 |
| 7184733 | High frequency receiving device, integrated circuit used for the same, and TV receiver using them An oscillation frequency changing means is inserted between a tuner and an oscillator of local oscillator (56) of a high frequency receiving device, and the oscillation frequency changing means, in each frequency band received, changes the oscillation frequen... | 02/27/2007 |
| 7181184 | Band edge amplitude reduction system and method A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of signals not under the power control of the receiver. For example, the r... | 02/20/2007 |
| 7173551 | Increasing data throughput in optical fiber transmission systems Data throughput rates are increased in an optical fiber communication system without requiring replacement of the existing optical fiber in a link. Channel throughput is increased by upgrading the components and circuitry in the head and terminal of an optical fiber... | 02/06/2007 |
| 7173505 | Tuning RF circuits using switched inductors provided in a monolithic integrated circuit A Radio Frequency (RF) circuit includes an active portion and a tuned portion. The active portion receives an RF signal and that operates upon the RF signal. The tuned portion couples to the active portion and includes a first inductor, a second inductor, and a swit... | 02/06/2007 |
| 7171176 | Tuner system self adaptive to signal environment A circuit and method for adjusting the operating characteristics of a tuner in accordance with information derived from the signals being processed by the tuner. Depending upon signal type and/or signal strength, the power levels of certain components are adjusted a... | 01/30/2007 |
| 7164894 | Receiver capable of switching between digital and analog broadcasting signals A receiver includes an FFT analysis result/group delay characteristic determining unit for determining whether or not a group of carrier signals of a digital broadcasting signal satisfies predetermined requirements, and delivers a requirement satisfaction determinat... | 01/16/2007 |
| 7158764 | System and method for sending high fidelity sound between wireless units A system and method for sending high fidelity sound between wireless units include the capability to receive audible sounds at a wireless unit and generate signals that represent the audible sounds. The system and method also include the capability to encode a first... | 01/02/2007 |
