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7643793 |
Method for relaying data packet for downlink in wireless communication system
A method for relaying data packets to a subscriber station (SS) by taking a relay station (RS) into consideration when a base station (BS) establishes a data packet scheduling is disclosed....
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7636297 |
Transmit diversity technique based on channel randomization for OFDM systems
A physical layer (PHY) module includes N T radio frequency (RF) channels and a mapping module. The N T RF channels each include N subcarriers. The mapping module includes N s inputs receiving...
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7623441 |
Scalable space-frequency coding for MIMO systems
A transceiver in an N×N MIMO (Multiple-In-Multiple-Out) system includes a mode selection module to select a spatial multiplexing rate and a coding module to space frequency code OFDM (Orthogonal...
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7606138 |
Multi-symbol encapsulated OFDM system
A method and system for communication of information in OFDM format are disclosed. The method employs multi-symbol encapsulation (MSE), wherein multiple OFDM symbols are grouped together in cyclic...
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7586988 |
Transmitting apparatus, receiving apparatus, communication system, and multiplex timing compensation method
This invention provides a transmitting apparatus including a plurality of signal generation units, a multiplexing unit which receives a plurality of signals output from the plurality of signal...
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7570576 |
Detection and mitigation of temporary (bursts) impairments in channels using SCDMA
Systems and methods are disclosed for detecting and mitigating temporary high-level impairments, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic...
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7489621 |
Adaptive puncturing technique for multicarrier systems
Various embodiments are described for adaptive puncturing techniques involving an adaptive bit loading block to select a modulation scheme and a puncturing pattern for each of a plurality of...
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7460876 |
System and method for intelligent transmitted power control scheme
Briefly, an adaptive transmitted power control scheme, which may be used in stations of a communication system, for example, a wireless communication system. The scheme may allocate transmission...
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7450535 |
Pulsed signaling multiplexer
In one embodiment, a pulsed signaling multiplexer is described that comprises a first AC-coupled transmitter and a second AC-coupled transmitter. The first AC-coupled transmitter includes a first...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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3870828 |
SUPERIMPOSED BINARY SIGNAL
Superimposed channel signalling device to transmit control functions by superimposing supervisory or secondary channel signals with high speed primary channel signals comprising signal...
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3832494 |
SIGNAL MULTIPLEXER AND DEMULTIPLEXER
The synchronizing and data signals for the displaying of data on the face of a video display unit are multiplexed into one composite signal by the use of voltage summing apparatus. The composite...
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3732375 |
PAIRED SIGNAL TRANSMISSION SYSTEM UTILIZING QUADRATURE MODULATION
Signal transmission systems for the transmission of a pair of information signals are provided in accordance with the teachings of the present invention wherein a pair of carrier signals in...
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3718767 |
MULTIPLEX OUT-OF-BAND SIGNALING SYSTEM
A multiplex out-of-band signaling system for a communication system having one or more frequency channels is disclosed. N signaling data gate N gated amplifiers coupled in common to a signaling...
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3571725 |
MULTILEVEL SIGNAL TRANSMISSION SYSTEM
A transmission system is described for transmitting a plurality of two-level pulse trains of arbitrary synchronization over a common signal path. A pair of pulse trains of varying pulse lengths are...
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3337691 |
Multiplex digital communication system
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3267459 |
Data transmission system
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3209261 |
Transmission systems
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