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Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 8170149 | OFDM receiver apparatus An OFDM receiver apparatus receives an OFDM signal including a plurality of DBPSK signals transmitting identical information. An extraction unit extracts the plurality of DBPSK signals from the OFDM signal. A phase difference calculation unit calculates a phase diff... | 05/01/2012 |
| 8126089 | Method and apparatus for providing frame synchronization in a digital communication system that supports multiple modulation formats A method and apparatus for frame synchronization in digital communication systems using multiple modulation formats, including the Differential Phase Shift Keying (DPSK), Duobinary Signaling (DBS), and ON/OFF Keying (OOK) modulation formats, perform a search for bot... | 02/28/2012 |
| 8064544 | Method and device for receiving OPFDM-DQPSK signal In the field of communication and transmission, a method and a device for receiving an OPFDM-DQPSK signal are provided. The device includes a power splitter, adapted to split the OPFDM-DQPSK signal into two beams of signals; a polarization beam splitter (PBS), adapt... | 11/22/2011 |
| 8000412 | Low power serial link The present invention relates to a low power serial link employing differential return-to-zero signaling. A receiver circuit consistent with some embodiments includes an input circuit for receiving differential serial data signals that form a differential return-to-... | 08/16/2011 |
| 7995678 | System and method for communicating data using weighted bit soft decisions for differentially encoded phase shift keying A receiver includes a signal input for receiving a differentially-encoded quadrature phase-shift keyed (DEQPSK) communication signal. A demodulator performs bit decisions on a received coherent symbol and bit decisions on a received differential symbol. A processor ... | 08/09/2011 |
| 7860191 | Optimal two-layer coherent demodulation for D-PSK (Differential Phase Shift Keying) A D-PSK demodulator utilizes a two-layer coherent approach to estimate the phase shift of adjacent symbols. There is generated a probability set of each received symbol being one of possible constellation values. There is also generated a probability set of each of ... | 12/28/2010 |
| RE41931 | Receiver module and receiver formed from several cascaded modules Receiver module and receiver formed from several cascaded module. The module comprises inputs (E1, E2, E3, E4) and outputs (S1, S2, S3, S4) connected to a selection means (44) circuit, to a switching means (45... | 11/16/2010 |
| 7720180 | Tracking error detection and correction methods and apparatus The objective of this invention is to perform high-precision tracking error detection and tracking control using digital circuitry at relatively low speed and with a small circuit scale. Tracking servo circuit is formed as a single-chip circuit. Low-pass filters (LP... | 05/18/2010 |
| 7653151 | Communication system with demodulation of two-level differential amplitude-shift-keying signals A structure and method for demodulating two-level differential amplitude-shift-keying signals using simple adding operations are provided. Threshold values are dynamically adjusted according to the channel response. By comparing the threshold values and the differen... | 01/26/2010 |
| 7508889 | Digital apparatus for soft detection of multi-chip DBPSK signals A system for implementing the soft decision of a 3-chip differential binary phase shift keying (DBPSK) optical signal using digital components. Pair-wise comparisons of three differentially detected signals are performed and analyzed by digital logic which determine... | 03/24/2009 |
| 7477707 | Computationally efficient demodulation for differential phase shift keying A DPSK demodulator demodulates DPSK signals in a computationally efficient manner to reduce the power requirements of the DPSK demodulator. A DPSK signal is received, digitized, converted to its in-phase (I) and quadrature (Q) components and filtered to remove noise... | 01/13/2009 |
| 7474715 | Variable load circuit for reducing quadrature phase error A variable load circuit for adjusting a phase of a differential signal including a first transistor having a first terminal adapted to receive a first component of the differential signal, a second transistor having a first terminal adapted to receive a second compo... | 01/06/2009 |
| 7433428 | Method of reducing the variance of the signal-to-noise rate estimated for a signal with amplitude differential phase-shift keying modulation This method reduces the variance of the estimation of the signal-to-noise rate in a multiuser digital communications system. These communications require a sending of a phase reference symbol prior to sending a information, where the estimation is made of the signal... | 10/07/2008 |
| 7415078 | Demodulation for phase modulation A method and pre-processor for processing a MCPM signal including a phase multiplier for multiplying a MCPM signal by a scaling factor. The pre-processor also includes a frequency shifter for shifting the scaled MCPM signal to create a frequency offset. The pre-proc... | 08/19/2008 |
| 7397848 | Partial response receiver A receive circuit for receiving a signal transmitted via an electric signal conductor. A first sampling circuit generates a first sample value that indicates whether the signal exceeds a first threshold level, and a second sampling circuit generates a second sample ... | 07/08/2008 |
| 7369623 | Apparatuses to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards A technique is described for simultaneously and synchronously transmitting digital data and a clock signal in a digital integrated circuit, circuit board, or system. The technique is based on the phase shift keying (PSK) modulation of an RF high frequency carrier wh... | 05/06/2008 |
| 7366465 | Homodyne RFID receiver and method An RFID circuit comprises an RF carrier signal source, and a hybrid coupled thereto operable to generate first, second and third phase-shifted RF carrier signals. The circuit further comprises first, second, and third mixers coupled to the hybrid each operable to mu... | 04/29/2008 |
| 7362694 | Programmable identity of I and Q channels A multiplexing scheme to select either an I component or a Q component for input to I channel and Q channel inputs of a baseband receiver. The selection of which of the I or Q component to place on the I channel input and which other to place on the Q channel input ... | 04/22/2008 |
| 7342954 | Adaptive modulation for wireless networks The invention relates to communication between terminals. Where communication is over an ideal channel then a high throughput modulation scheme can be used. Where the terminals suffer interference or noise, transmission can be modified to a more robust modulation sc... | 03/11/2008 |
| 7324613 | Multi-layer differential phase shift keying with bit-interleaved coded modulation and OFDM An efficient system and method for modulation and demodulation to achieve a high data rate using Bit-Interleaved Coded Modulation and OFDM uses either a coherent or a non-coherent transmission scheme using differential modulation. In order to maintain a high data ra... | 01/29/2008 |
| 7321639 | Demodulator and address information extractor In a demodulator for demodulating a BPSK modulated signal, demodulation performance degradation caused by analog circuits such as fabrication variation is suppressed, and furthermore, frequency variation in the BPSK modulated signal is followed by the demodulator. A... | 01/22/2008 |
| 7321640 | Active polyphase inverter filter for quadrature signal generation A quadrature signal generator receives a differential input signal and generates quadrature output signals that are 90 degrees out-of-phase with each other. The quadrature generator includes a coarse stage and a plurality of refinement stages. The coarse stage gener... | 01/22/2008 |
| 7315587 | Demodulation method and apparatus based on differential detection system for π/4 shifted QPSK modulated wave A demodulator of a differential detection system for a π/4 shifted QPSK or DQPSK modulation wave in digital communication. The demodulator includes a differential detector connected to receive orthogonal components of the modulation wave, a corrector connected to r... | 01/01/2008 |
| 7308049 | Method and apparatus for noncoherent signal processing in pilotless wireless systems Methods, apparatus and systems for implementing an algorithm for N-symbol noncoherent processing of M-ary DPSK signals in a pilotless, wireless system is provided. The algorithm is carried out with (N−1) recurrent steps (iterations) plus a decision step. Each iter... | 12/11/2007 |
| 7292655 | Apparatus and method and decoding biphase signals A technique of decoding a biphase signal comprises sampling the biphase signal to obtain phase sample values and sampling the biphase signal to obtain magnitude sample values. A first digital signal is derived from the phase sample values and associated bit combinat... | 11/06/2007 |
| 7287666 | Device for packaging and dispensing stacked items, in particular cosmetics on a medium A device for packaging and dispensing stacked items may include, a box including: a first portion, in particular a cover; and a second portion, in particular a drawer, that is movab... | 10/30/2007 |
| 7286481 | Wireless network adapted to transmit channel side information and method thereof Briefly, in accordance with one embodiment of the invention, a wireless network may include transmitters that may transmit information over a channel. the transmitter may also transmit channel side information over the channel. Further, the transmitters may adjust w... | 10/23/2007 |
| 7279988 | Digital frequency locked loop and phase locked loop frequency synthesizer A frequency synthesizer including frequency and phase locked loop that operates in either a frequency locked loop (FLL) mode or a phase locked loop (PLL) mode. In a first state, the frequency and phase locked loop operates in the FLL mode for initial frequency acqui... | 10/09/2007 |
| 7274678 | Method and system for transmitting data, with transmission antenna diversity The present invention provides a data transfer method for use in a CDMA system operating in the TDD mode. A data signal is transmitted in the form of a data stream of data bursts of different users between a first station and a second station via a multiplicity of a... | 09/25/2007 |
| 7272196 | Adjustable phase controlled clock and data recovery circuit A clock and data recovery circuit including: means for generating a first and a second clock signal; means for receiving the first clock signal and for generating a third clock signal from the first clock signal and means for receiving the second clock signal and fo... | 09/18/2007 |
| 7269231 | System and method for predistorting a signal using current and past signal samples A signal is predistorted by producing a set of sample values, each of at least a subset of which is dependent on (i) at least one of a plurality of past time spaced input samples and (ii) a current time spaced input sample, and independent of any other time spaced i... | 09/11/2007 |
| 7251299 | Time delay estimator A system for time delay estimation in a discrete time processing system includes a cross correlator that performs cross correlation on a first signal and a second signal, and provides a cross correlated output signals indicative thereof. A lag smoother receives the ... | 07/31/2007 |
| 7245672 | Method and apparatus for phase-domain semi-coherent demodulation A method and apparatus for phase-domain semi-coherent demodulator including a receiver for receiving at least a phase component of an input signal. The phase domain semi-coherent demodulator may include a decision unit for forming a decision based on a delayed refer... | 07/17/2007 |
| 7213257 | Determining phase linearity in CATV distribution systems An apparatus for testing the phase linearity of a network comprises a first local oscillator, a first mixer, and a first filter, a second local oscillator, and a second mixer for mixing the first IF to the desired output frequency. The output of the second mixer is ... | 05/01/2007 |
| 7206350 | OFDM multiple sub-channel communication system A transmitter and corresponding method for transmitting an OFDM signal in a communications channel, including a plurality of base-band OFDM modulators, each for modulating a respective data signal onto a plurality of orthogonal sub-carriers and outputting a respecti... | 04/17/2007 |
| 7200191 | De-modulation of MOK (M-ary orthogonal modulation) A system and method for the iterative detection and demodulation of M-ary orthogonal signals (MOK) and signals modulated using Complementary Code Keying (CCK) is described. An important feature of these methods is the good performance of noncoherent detectors in AWG... | 04/03/2007 |
| 7196644 | Decoupling of analog input and digital output A signal processing system includes a receiver for receiving an analog signal. The system also includes an analog-to-digital converter (ADC) coupled to the receiver. At each of a series of time intervals, the ADC outputs sequential digital codes. Each digital code c... | 03/27/2007 |
| 7194045 | Method for determining a reference clock phase from band-limited digital data streams The invention provides a method for recovering a digital datastream, in which a reference clock phase is recovered from the digital datastream, the digital datastream being received in a datastream receiver, low-pass filtered in a low-pass filter device, an edge pos... | 03/20/2007 |
| 7190736 | Technique to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards A technique is described for simultaneously and synchronously transmitting digital data and a clock signal in a digital integrated circuit, circuit board, or system. The technique is based on the phase shift keying (PSK) modulation of an RF high frequency carrier wh... | 03/13/2007 |
| 7191385 | Error correction in a locating method and system A method of detecting and correcting bit errors in a digitally encoded data stream includes correlating a received bit transition in the data stream with a multitude of possible bit transitions to generate corresponding correlated bit transition values. A bit transi... | 03/13/2007 |
