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| Number | Title | Issue Date |
| 7411895 | Controlled superposition coding in multi-user communication systems Methods of using superposition coding in a communications systems, e.g., a multi-user communications system. Superpostion coding in accordance with the invention occurs in the case of an uplink by transmissions of different wireless terminals transmitting using the ... | 08/12/2008 |
| 7298692 | Radio base station apparatus and communication terminal MS receives a downlink signal transmitted based on a guard interval determined using a delay profile with high accuracy generated based on a CDMA uplink signal, and performs Fourier Transform processing on a preamble portion of the downlink signal to demodulate. Tra... | 11/20/2007 |
| 7260057 | Data transmission system The invention provides a technique that enables a correct discrimination of reception data, when the supply voltage of a semiconductor integrated circuit having a simultaneous bi-directional interface is decreased. The data transmission system is provided with input... | 08/21/2007 |
| 7170850 | Transmission apparatus and method and providing medium thereof A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21-1 of the transmission apparatus is mapped onto predetermined signal p... | 01/30/2007 |
| 6980509 | Transmitting device and method, and providing medium A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21-1 of the transmission apparatus is mapped onto predetermined signal p... | 12/27/2005 |
| 6856590 | OFDM transmission device and OFDM transmission method The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information channels are multiplexed in the sense of frequency and collectively subjecte... | 02/15/2005 |
| 6678521 | Method for determining amplitudes and phases of the different channels in an electromagnetic signal transmission network, such as a telecommunication satellite antenna Amplitudes and phases of different channels in an electromagnetic signal transmission network, whereof the sources are arranged in a triangular lattice, are determined by tiling the lattice with hexagons having six equal sides, the hexagonal tiles that ar... | 01/13/2004 |
| 6647278 | Electronic devices including indicator control circuits and related methods of controlling indicators An electronic device includes an indicator that generates an indication of an event responsive to an indicator control signal from an indicator control circuit coupled between a processor and the indicator. The processor generates an indicator off-time va... | 11/11/2003 |
| 6625111 | OFDM communication apparatus The known signal that is transmission data for the pilot carrier is output to multiplier 103 to be subjected to amplitude adjustment (gain control) using a predetermined coefficient. The coefficient is set as appropriate in the range that makes an amplitu... | 09/23/2003 |
| 6445935 | Electronic devices including indicator control circuits and related methods of controlling indicators An electronic device includes an indicator that generates an indication of an event responsive to an indicator control signal from an indicator control circuit coupled between a processor and the indicator. The processor generates an indicator off-time va... | 09/03/2002 |
| 6167418 | Byte-switching arithmetic unit The present invention provides a byte-switching arithmetic unit comprising at least three stages, each of which has a plurality of two-input selectors operable in a predetermined minimum bit width unit, the byte-switching arithmetic unit having two inputs... | 12/26/2000 |
| 5864584 | Circuitry for allowing two drivers to communicate with two receivers using one transmission line The present invention allows for the simultaneous transmission of two digital signals from one integrated circuit to another. The two digital signals are encoded utilizing a voltage divider circuit and are then transmitted by one transmission line to the ... | 01/26/1999 |
| 5761287 | Digital key telephone connecting apparatus and method in a digital key telephone system In connecting a first digital key telephone to a second digital key telephone in a digital key telephone system, an additional connection module provides data transmission for a call between the first digital key telephone and the second digital key telep... | 06/02/1998 |
| 5099478 | Communication of secondary channel byte in a synchronous modem without statistical uncertainty A method and system for communicating data over a communications channel such as a telephone line includes the conversion of asynchronous data transmitted from a diagnostic microcomputer through a modem into synchronous data for transmission over the comm... | 03/24/1992 |
| 5051993 | Mixed modulation level communication system A communication system has an information signal having a plurality of data streams. The data streams are simultaneously modulated on a multi-level symbol transmission. The data streams may have either independent or dependent signalling protocols. A tran... | 09/24/1991 |
| 4999590 | Four state phase shift modulator, in particular for amplitude modulation of two carriers in quadrature with a large number of states A QPSK modulator has a signal generator which generates four carrier outputs having respective phases of 0°, 90°, 180°, and 270°. A four input phase selector is connected to the four outputs of the generator, has four modulator signal inputs, and has ... | 03/12/1991 |
| 4972408 | Method and apparatus for combining and for separating a low data rate digital channel with or from the high data rate digital channel of a transmission link A method of combining and separating a low data rate digital channel with or from the high data rate digital channel of a transmission link in which the low data rate digital channel S1(t) is combined with the high data rate digital channel signal S2(t) i... | 11/20/1990 |
| 4903125 | Method and apparatus for conveying information signals Video signals from a source are digitized and applied to a source coder which segregates the signals into four channels (CH1 to CH4) of progressively less visual significance. CH1 carries basic picture information at a relatively low resolution. CH2 to CH... | 02/20/1990 |
| 4818634 | Composite metal spring material, method of making, and spring members formed therefrom A composite metal spring material, and formed electrically conductive contact spring members made from the material, comprise metallurgically bonded layers of copper and stainless steel of selected compositions which are subjected to a novel sequence of h... | 04/04/1989 |
| 4814634 | Ternary signal multiplexor circuit The multiplexing circuit disclosed herein combines multiple input signals into a common output by allowing ternary signals to pass from multiple input circuits to a common output circuit. The circuit combines ternary signals with minimum feedback between ... | 03/21/1989 |
| 4602365 | Multi-token, multi-channel single bus network A token-passing ring network, having a plurality of nodes connected to a bus loop, employs multiplexing circuitry for connecting each node to the bus on at least one of a plurality of simultaneously operating bus channels. Each bus channel operates indepe... | 07/22/1986 |
| 4498166 | Multiplexer and demultiplexer circuits for analog signals There is disclosed a multiplex system for combining a plurality of analog or other type input signals at a transmitter site to provide a composite signal for transmission to a receiver site via a common transmission channel. At the transmitter, a referenc... | 02/05/1985 |
| 4464767 | System for generation of multiple pointed QAM signal spaces by use of synchronous Qam transmitters A system for the generation of many-pointed QAM signal spaces by use of multiple, synchronous QAM transmitters is provided. Three individual relatively low BPS data rate transmitters have their outputs connected to different weighting multipliers. The out... | 08/07/1984 |
| 4355397 | Full duplex communication system for voice grade channels A pair of full duplex modems (12, 14), each at one end of a two-wire voice grade telephone channel (16), simultaneously transmit synchronous data at high speeds in both directions. In each modem, the simultaneous transmission and reception are accomplishe... | 10/19/1982 |
| 4101734 | Binary to multistate bus driver, receiver and method A binary to multistate line driver and remote receiver includes a line driver comprising first and second injection logic encoder circuits. The circuits have current injectors and are connected to receive respective first and second binary signals to prov... | 07/18/1978 |
| 3979561 | Level-code encoded multiplexer Apparatus for multiplexing a large number of digital signals onto a few aog channels using a level code encoded multiplexer. Each digital signal to be multiplexed is assigned a unique reference level to represent a logical "one", with all digital inputs ... | 09/07/1976 |
