Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7408997 | Modulation/demodulation apparatus using matrix and anti-matrix A modulation and demodulation system is provided. The system uses n sub-carrier frequencies and an oversampling positive integer and includes a modulation circuit and a demodulation circuit. The modulation circuit includes a modulation ROM that stores columns of ele... | 08/05/2008 |
| 7409021 | Voltage controller for a highly linear phase interpolator An arrangement for generating control signals is provided. Embodiments provides a method, apparatus, system, and machine-readable medium to generate substantially linear, analog control signals to adjust amplitude contributions of phases of a reference clock signal ... | 08/05/2008 |
| 7409023 | Method and apparatus for effecting synchronous pulse generation for use in serial communications A method for effecting synchronous pulse generation for use in serial communications is provided. The method includes the steps of generating a difference signal representing a signal level difference between at least two data stream signals; providing a clock signa... | 08/05/2008 |
| 7406135 | Reducing power consumption in signal detection Methods, systems, and media to time-share the signal detection between reference voltages for a data transmission are contemplated. Embodiments include a time-sharing detector that is designed to enable comparison of a first reference voltage and a second reference ... | 07/29/2008 |
| 7406157 | Methods and apparatuses for determining loop characteristics using an extended voice-band modem Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of downstream multi-carrier tones of a digital subscriber line activation... | 07/29/2008 |
| 7406125 | Method for initialization of per tone frequency domain equalizer (FEQ) through noise reduction for multi-tone based modems An improved per-tone FEQ method with a noise reduction technique using periodic training pilot tones increases the throughput for long-reached modems. This method can reduce the noise effects in estimating FEQ equalizer coefficients. Each per-tone FEQ can be estimat... | 07/29/2008 |
| 7406136 | Channel select filter and applications thereof A channel select filter having channel equalization includes a first low pass filter stage, a gain stage, a subtraction module, and a second low pass filter stage. The first low pass filter stage is operably coupled to filter input signals to produce first low pass ... | 07/29/2008 |
| 7406139 | System and method to identify a modulation format of a data frame within a cellular wireless network The modulation format of a data block (frame) received from a servicing base station by a wireless terminal in a cellular wireless communication system is identified. This involves first receiving several radio frequency (RF) bursts of one data block (frame) from th... | 07/29/2008 |
| 7403576 | Systems and methods for receiving data in a wireless communication network A method of communicating over a wideband communication channel divided into a plurality of sub-channels comprises dividing a single serial message intended for one of the plurality of communication devices into a plurality of parallel messages, encoding each of the... | 07/22/2008 |
| 7403750 | Reuse of digital-to-analog converters in a multi-mode transmitter A transmitter for generating modulated signals is shown, wherein in a first-type operating mode, a first digital signal is input into a digital-to-analog converter to obtain a first analog signal that is input into a first-type unit, in which a first-type modulated ... | 07/22/2008 |
| 7403578 | Robust burst detection and acquisition system and method A method of parameter estimation in a shared channel communications system includes the steps of receiving a preamble including a first sequence corresponding to a sequence having zero autocorrelation, a second sequence having zero autocorrelation, and a third seque... | 07/22/2008 |
| 7403583 | System and method for predictive synchronization for locating interleaving frames and demodulation training sequences A system and method for using Psuedo-Noise (PN) phase to determine frame start of a data frame is provided. The system and method includes at least two PN component codes, wherein the at least two PN component codes are relatively prime. A received PN composite enco... | 07/22/2008 |
| 7403556 | Radio receiver supporting multiple modulation formats with a single pair of ADCs A radio receiver has an ADC connected to an RF module. Baseband processing modules are connected to the ADC, and a power control module is connected to each of the baseband processing modules. Each of the baseband processing modules is capable of performing detectio... | 07/22/2008 |
| 7400686 | Apparatus and method for improved performance in radio telecommunication systems that use pulse-shaping filters A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately ... | 07/15/2008 |
| 7400692 | Telescoping window based equalization At least one wireless communication is received and sampled to produce samples. A channel response is estimated corresponding to the at least one wireless communication. An initial channel correlation matrix is produced based on the received samples and the channel ... | 07/15/2008 |
| 7400694 | Method and apparatus for eye-opening based optimization An eye opening measurement technique, that does not interrupt a receiver's normal operation, is used as a metric for optimizing any selected parameters of the receiver's operation. If eye opening size decreases, as a result of a change to a receiver parameter, the p... | 07/15/2008 |
| 7397868 | Direct conversion RF transceiver for wireless communications A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an interm... | 07/08/2008 |
| 7397867 | Mapping radio-frequency spectrum in a communication system Methods and systems for analyzing or mapping portions of the radio frequency spectrum are provided. In one embodiment of the invention, a communication method is provided, with a first step of the method including receiving an electromagnetic energy from a portion o... | 07/08/2008 |
| 7397844 | Method and apparatus for processing a modulated signal using an equalizer and a rake receiver In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized within an equalizer to generate symbol estimates, which may be subsequent... | 07/08/2008 |
| 7397866 | Apparatus and method for transmitting/receiving differential STBC using channel power A method and apparatus for transmitting/receiving a differential space-time block code (STBC) by estimating only channel power in a wireless communication system using a plurality of transmission antennas. A receiver for receiving information symbols encoded by a di... | 07/08/2008 |
| 7397840 | Dual code spread spectrum communication system A direct sequence spread spectrum receiver includes a first spreading code generator for receiving a first channel signal spectrum spread by a first spread code, while a second group of receivers use a second spreading code, where the first and second codes are part... | 07/08/2008 |
| 7397862 | Method of designing interleavers for multiple-encoder MIMO OFDM systems An improved interleaver design to fully explore the diversity of the MIMO OFDM systems provides higher diversity gain than usual. A method for wireless data communication using such interleaver design implements parsing a bit stream into multiple spatial data stream... | 07/08/2008 |
| 7394877 | Low-power packet detection using decimated correlation A method and apparatus is presented for detecting the presence of a packet being transmitted on a communications medium using self-correlation of samples taken from the communications medium. The method saves on power consumption by sampling the communications mediu... | 07/01/2008 |
| 7394881 | Radio receiver and/or transmitter including a programmable equalizer A radio receiver includes a low noise amplifier, a down conversion module, an analog to digital converter, and a digital demodulator. The digital demodulator is operably coupled to convert the digital low IF signals into inbound digital symbols and includes a baseba... | 07/01/2008 |
| 7394863 | Methods and apparatus for signaling on a differential link Methods and apparatus are disclosed for transitioning a receiver from a first state to a second state using an in-band signal over a differential serial data link. ... | 07/01/2008 |
| 7394882 | Digital communication synchronization system and method thereof Disclosed is a synchronization system in digital communication, which comprises a converter for receiving signals from a transmitter, and oversampling a single symbol interval into a plurality of subsamples; a signal processor for classifying each symbol oversampled... | 07/01/2008 |
| 7394864 | Mixed waveform configuration for wireless communications A mixed waveform configuration for wireless communications including a first portion that is modulated according to a single-carrier modulation scheme and a second portion that is modulated according to a multi-carrier modulation scheme. The waveform is specified so... | 07/01/2008 |
| 7394870 | Low complexity synchronization for wireless transmission A receiver, system and method for providing symbol timing recovery that allows for inexpensive and low-complexity synchronization for communication systems. A receiver receives a signal including digital data in the form of packets that is transmitted from a transmi... | 07/01/2008 |
| 7394871 | Digital implementation of multi-channel demodulators A method and circuitry for implementing digital multi-channel demodulation circuits. More particularly, embodiments of the present invention provide a digital multi-channel demodulator circuit. The demodulator includes a frequency-block down-converter that receives ... | 07/01/2008 |
| 7394847 | Receiving method and receiver with high-precision signal estimation A second phase rotation unit rotates a signal equalized by an equalizer by a phase error detected by a second phase error detection unit. A decision unit partitions a phase plane into a plurality of sub-areas in accordance with phases to which CCK modulated signals ... | 07/01/2008 |
| 7391818 | Energy-control and path-selection method and apparatus for digital diversity signaling A method and apparatus is provided for communicating digital information using diversity signaling with a constrained amount of transmission energy per bit available. The method may optimize the number of diversity channels used, optimize the energy allocation emitt... | 06/24/2008 |
| 7391824 | High-speed serial link receiver with centrally controlled offset cancellation and method A high-speed serial link receiver includes variable offset comparators with centrally controlled offset cancellation. The receiver includes a comparator stage to receive a high-speed differential input signal. Comparator elements of the comparator stage have first a... | 06/24/2008 |
| 7391831 | Apparatus and method for mode transition of a transmit diversity scheme in a mobile communication system for using transmit diversity scheme in a mobile communication system for using transmit An apparatus and method for Transmit Diversity mode transition in a mobile communication system for use with transmit diversity is disclosed. In a mobile communication system including a Node B comprising one or more antennas and a Mobile Station (MS) for transmitti... | 06/24/2008 |
| 7391832 | System and method for channel bonding in multiple antenna communication systems Systems and methods that provide channel bonding in multiple antenna communication systems are provided. In one embodiment, a method for signal transmission over a plurality of antennas of a transmitter may include, for example, one or more of the following: demulti... | 06/24/2008 |
| 7391826 | Decoding method and apparatus A method of decoding is provided comprising processing iterations. In each processing iteration, there is a first Max-Log-MAP decoding operation giving rise to a systematic error due to the Max-Log approximation, and a first weighting operation to weight extrinsic i... | 06/24/2008 |
| 7391823 | Digital broadcasting receiver A demodulation circuit generates information related to the frequency of error correction, and feeds the information to a CPU. The CPU acquires noise intensity data on the basis of the information related to the frequency of error correction from the demodulation ci... | 06/24/2008 |
| 7392450 | Method and apparatus of compensating for signal receiving error at receiver in packet-based communication system A method and an apparatus of compensating for a signal receiving error at a receiver in a packet-based communication system. In the invention, frequency offset estimation and DC offset estimation obtained in a current packet are re-used in a next packet if the recei... | 06/24/2008 |
| 7391813 | Digital wireless communications device A digital wireless communications device enabling call distance to be increased while avoiding mute processing as far as possible, even if code error occurs in an ADPCM code. The digital wireless communications device may be configured to include: an error detector ... | 06/24/2008 |
| 7391816 | Decoding upstream V.92-encoded signals A decoder may include a constellation mapper arranged to receive a symbol and to determine two constellation points that are proximate the received symbol. An index mapper may determine a constellation index corresponding to the received symbol based on the received... | 06/24/2008 |
| 7388918 | Apparatus and method for the transparent upgrading of technology and applications in digital radio systems using programmable transmitters and receivers In a digital radio system including a transmitter unit and at least one receiver unit, changes to the system can implemented without modifying the hardware components by providing the transmitter unit and the receiver unit with processing capability. With respect to... | 06/17/2008 |
