Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7924939 | Power transmission apparatus in wireless communication systems An envelope elimination and restoration power transmission apparatus in a wireless communication system is provided. The apparatus comprises a signal processor for dividing a transmission signal into a size component and a phase component and for generating a contro... | 04/12/2011 |
| 7920642 | Very high data rate conversion in FPGAs Methods, circuits, and apparatus for providing an RF up-converter using digital circuits. One exemplary'embodiment provides an up-converter that uses multiple channels of parallel digital processing, then serializes individual bits from these channels to achieve hig... | 04/05/2011 |
| 7920643 | Maximizing power and spectral efficiencies for layered and conventional modulations Methods and apparatuses for maximizing power and spectral efficiencies in a wireless communication system are disclosed. The invention is particularly useful for layered modulation applications because power levels for such applications are relatively high. A layere... | 04/05/2011 |
| 7912146 | Method and apparatus for transmitting data in a communication system A method and apparatus for transmitting data in a communication system. In the apparatus, a repeater repeatedly processes an input signal a predetermined number of times. A Space-Frequency Block-Coded (SFBC) encoder performs SFBC coding on the repeatedly processed i... | 03/22/2011 |
| 7912144 | Integrated modulators and demodulators A modulating means for modulating and/or demodulating data for transmission from a first device to a second device, wherein the modulating means is capable of modulating and/or demodulating data according to at least a first and a second modulation technique. ... | 03/22/2011 |
| 7912145 | Filter for a modulator and methods thereof In some exemplary embodiments of the invention, a transfer function of a filter for a fractional-N sigma-delta modulator may be calculated to be optimized according to predefined optimization criteria. For example, the optimization criteria may include spectral clea... | 03/22/2011 |
| 7912147 | Compress-forward coding with N-PSK modulation for the half-duplex Gaussian relay channel Systems and methods that implement compress-forward (CF) coding with N-PSK modulation for the relay channel are disclosed, where N is greater than or equal to two. In the CF scheme, Wyner-Ziv coding is applied at the relay to exploit the joint statistics between sig... | 03/22/2011 |
| 7903755 | Method and apparatus for preamble training with shortened long training field in a multiple antenna communication system Methods and apparatus are provided for communicating data in a multiple antenna communication system having N transmit antennas. According to one aspect of the invention, a header format includes a legacy preamble having at least one legacy long training field and a... | 03/08/2011 |
| 7903756 | System and method for communicating data using waveform with extended preamble A system communicates data and includes an encoder for encoding communications data. A modulator maps the communications data based on a specific mapping algorithm to form a communications signal over which the communications data can be transmitted. The communicati... | 03/08/2011 |
| 7903757 | Multi-tone transmission A Multi-tone transmission system processes input data through a plurality of intermediate processing stages 12, 14, 16 and corresponding stages of intermediate data 18, 20. A symbol including a number of tones is obtained therefrom by an inverse Fourie... | 03/08/2011 |
| 7899130 | Transmitter for operating multiple devices A transmitter that is programmable to transmit one or more identification or device codes, using one or more transmission formats, at one or more transmission frequencies to control one or more respective devices. In one embodiment, the transmitter includes a contro... | 03/01/2011 |
| 7899131 | Broadcast transmission with spatial spreading in a multi-antenna communication system An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, an... | 03/01/2011 |
| 7899132 | Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same A method for performing a precoding based on a generalized phase shift or a precoding based on an extended phase shift in a Multi-Input Multi-Output (MIMO) system employing several sub-carriers, and a transceiver for supporting the same are disclosed. A phase-shift-... | 03/01/2011 |
| 7894544 | Apparatus and method for transmitting/receiving a signal in a mobile communication system using a multiple-input multiple-output scheme In a communication system, a signal transceiver generates an upper pre-encoding symbol stream and a lower pre-encoding symbol stream by pre-encoding an upper transmission vector and a lower transmission vector according to a pre-encoding scheme when the upper and lo... | 02/22/2011 |
| 7894545 | Time alignment of polar transmitter An alignment apparatus for use with a polar transmitter system is disclosed herein. The alignment apparatus includes a signal alignment module configured to apply an amplitude modulation control signal and a frequency modulation control signal to the polar transmitt... | 02/22/2011 |
| 7885350 | System and method for non-interfering signaling and reception of overlapping single carrier transmissions over delay spread channels A signaling approach using block repetition and phase ramping that is robust and enables multi-user communication with higher order modulations over multipath channels, coupled to a receiving approach in the time domain that utilizes phase de-ramping, block averagin... | 02/08/2011 |
| 7881398 | FFT numerology for an OFDM transmission system An exemplary fast Fourier transform (FFT) numerology for an orthogonal frequency division multiple access (OFDMA) downlink transmission system is described. The exemplary FFT numerology reduces the FFT sampling rate for a given transmission bandwidth, thereby increa... | 02/01/2011 |
| 7881397 | Wireless communication system Methods and systems for modulating a signal are described. A phase-modulated signal that includes a sequence of contiguous one-cycle sinusoidal waveforms having a frequency above 50 MHz is generated. The phases of the one-cycle sinusoidal waveforms correspond to sym... | 02/01/2011 |
| 7881399 | Transmission circuit and communication device Provided is a transmission circuit which is small in size, operates with high efficiency, and outputs a transmission signal having high linearity. A signal generation section 11 generates an amplitude signal m(t) and a phase signal. An angle modulation sectio... | 02/01/2011 |
| 7881400 | Pulse modulation type transmitter apparatus and pulse modulation type receiver apparatus A pulse modulation type transmitter apparatus and a pulse modulation type receiver apparatus wherein both a fast synchronization establishment and a low power consumption of a synchronizing part can be achieved at the same time and wherein the data transmission/rece... | 02/01/2011 |
| 7873117 | Wireless communication base station apparatus and wireless communication method in multicarrier communication A base station apparatus wherein the interference suppression symbol combination can be performed in a case of using the repetition technique in a multicarrier communication. In a base station (100), a repetition part (103) repeats or copies each of da... | 01/18/2011 |
| 7873116 | Transmitter A transmitter is provided which effectively reduces a peak that occurs in transmitting signal electric power. A baseband limiter applies a peak reduction process to digital signals on a plurality of carriers in a baseband. A band limiting filter applies a band limit... | 01/18/2011 |
| 7869538 | System and method for I/Q imbalance compensation A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602... | 01/11/2011 |
| 7869539 | Methods, systems, and computer program products for rateless coding The disclosed methods, systems, and computer-program products for compute a power allocation for a rateless, error-correcting code constructed from a plurality of repeated blocks having a plurality of superimposed layers and having a decoding signal-to-noise ratio (... | 01/11/2011 |
| 7864880 | Blind synchronization and demodulation Techniques are described that provide inter-symbol interference—(ISI) and multi-user interference—(MUI) resilient blind timing synchronization and low complexity demodulation in wireless communication systems. A nonzero mean symbol is transmitted with a predeter... | 01/04/2011 |
| 7848447 | Radio parameter group generating apparatus, transmitter and receiver An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio para... | 12/07/2010 |
| 7848448 | Method of generating reference signal in wireless communication system A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulatio... | 12/07/2010 |
| 7844012 | Digital broadcasting transmission/reception system having improved receiving performance and signal processing method thereof A digital broadcasting transmission/reception system having improved receiving performance and signal processing method thereof. A digital broadcasting transmitter according to the present invention includes a data pre-processor which processed robust data and gener... | 11/30/2010 |
| 7844013 | Transmitting apparatus, receiving apparatus, and link adaptation method A link adaptation method and others wherein feedback information amount can be reduced. According to this method, a receiving apparatus (100) calculates, based on a channel matrix, a capacity (C) and a stream ratio (r) that is a ratio of the reception qualiti... | 11/30/2010 |
| 7839947 | Circuit and method for reducing the crest factor According to the invention, a circuit for reducing the crest factor is provided: (A) with a transmit path with a data symbol to be transmitted; (B) with a model path, which is arranged ... | 11/23/2010 |
| 7839948 | Time slicing techniques for variable data rate encoding The disclosure is directed, to a multi-channel encoder. The multi-channel encoder is configured to generate an encoded data stream. The multi-channel encoder includes a plurality of channel encoders, and a processor configured to allocate time slots in the encoded d... | 11/23/2010 |
| 7835461 | Low power radio transmitter using pulse transmissions A low power radio transmitter includes an intermediate frequency stage, signal-to-pulse conversion module, and a power amplifier. The intermediate frequency stage up-converts the frequency of a base-band digital signal into an N-bit signal at the intermediate freque... | 11/16/2010 |
| 7826552 | Semiconductor device and wireless communication system The present invention provides a structure in which an amplitude-modulation mode and a frequency-modulation mode are switched. A semiconductor device of the invention has: a reset control circuit to which a modulation mode select signal which selects an amplitude-mo... | 11/02/2010 |
| 7822145 | Method and system for generating synthetic wavefront phase/time delta of arrival A system and method for generating signals providing a synthesized wavefront phase to at least one receiver is disclosed. The system includes a buffer having a length of registers and a controller that sequences data through the length of registers. The controller d... | 10/26/2010 |
| 7822144 | Communication system having reduced delay time A communication system includes a transmitter having a signal generator for generating a signal for transmitting data, a transmission delay unit for repeatedly delaying the signal from the signal generator for a predetermined delay time within a symbol period and ge... | 10/26/2010 |
| 7817744 | Wireless communication apparatus and data multiplexing method A wireless transmitting apparatus capable of improving the reception characteristic at a data stream receiving end. In this apparatus, I/Q separating parts (110, 112) each separate first data modulated symbols included in any of a plurality of data streams, w... | 10/19/2010 |
| 7817743 | Multi-tone system with oversampled precoders A multi-tone system includes a data transmission circuit with an interface for receiving a data stream for transmission, a data steam splitter that splits the data stream to produce multiple substreams and a plurality of parallel data preparation circuits. Each data... | 10/19/2010 |
| 7817742 | Power supply apparatus and power supply method When transmitting an RF signal for power supply or a pulse signal for data transmission, amplification is made in such a manner that the peak power of the RF signal becomes greater than the peak power of the pulse signal. Thus transmitting the RF signal with the gre... | 10/19/2010 |
| 7813444 | Measurement method and arrangement for amplitude and phase synchronization in a polar transmitter A method and arrangement is shown for measuring an indicator of delay mismatch between a phase information path and an amplitude information path of a polar modulator. In the solution according to the invention a substantially sinusoidal measurement signal (301, ... | 10/12/2010 |
| 7813445 | DTV transmitter and method of processing digital broadcast data therein A DTV transmitter includes a signal generator, an interleaver, a trellis encoder, and a modulator. The signal generator generates a first data group including first, second and third regions, the first and third regions including main data and RS parity data, the se... | 10/12/2010 |
