Class / Patent application number | Description | Number of patent applications / Date published |
375240000 |
BANDWIDTH REDUCTION OR EXPANSION
| 10887 |
375259000 |
SYSTEMS USING ALTERNATING OR PULSATING CURRENT
| 4284 |
375316000 |
RECEIVERS
| 3780 |
375295000 |
TRANSMITTERS
| 2654 |
375130000 |
SPREAD SPECTRUM
| 1850 |
375219000 |
TRANSCEIVERS
| 1795 |
375224000 |
TESTING
| 1331 |
375354000 |
SYNCHRONIZERS
| 1275 |
375229000 |
EQUALIZERS
| 1163 |
375257000 |
CABLE SYSTEMS AND COMPONENTS
| 555 |
375211000 |
REPEATERS
| 215 |
375238000 |
PULSE WIDTH MODULATION
| 132 |
375286000 |
MULTILEVEL
| 80 |
375242000 |
PULSE CODE MODULATION
| 58 |
375239000 |
PULSE POSITION, FREQUENCY, OR SPACING MODULATION
| 39 |
375256000 |
PULSE TRANSMISSION VIA RADIATED BASEBAND
| 27 |
375216000 |
APPARATUS CONVERTIBLE TO ANALOG
| 15 |
375218000 |
EARTH OR WATER MEDIUM
| 10 |
375353000 |
PULSE AMPLITUDE MODULATION
| 6 |
375237000 |
PULSE NUMBER MODULATION | 5 |
20080267279 | RFID receiver for miller-encoded signals - A method for decoding a Miller-encoded signal having first and second quadrature components is provided. A Miller sub-carrier signal, synchronized with the Miller-encoded signal, is recovered from the quadrature components. A first, a second, a third, and a fourth half-bit correlation coefficient are calculated from at least one quadrature component and the Miller sub-carrier signal. A cross-correlation result of the first, the second, the third, and the fourth half-bit correlation coefficient is calculated. A value for an output bit is determined from the inverse sign of the cross-correlation result. | 10-30-2008 |
20110310953 | Managing Spectra of Modulated Signals in a Communication Network - Information is modulated onto frequency components of a signal. The resulting modulated signal includes at least some redundancy in frequency enabling a portion of the information modulated onto selected frequency components to be recovered from fewer than all of the selected frequency components. Controlling the spectrum of the modulated signal includes enabling the amplitude of at least some frequency components of the modulated signal to be set below a predetermined amplitude used for modulating the information. | 12-22-2011 |
20120275508 | Constellation-Multiplexed Transmitter and Receiver - A device of dynamic communication of information allows, on the average, non-integer bits per symbol transmission, using a compact code set or a partial response decoding receiver. A stream of selectable predetermined integer bits, e.g., k or k+1 data bits, is grouped into a selectable integer number of bit vectors which then are mapped onto corresponding signal constellations forming transmission symbols. Two or more symbols can be grouped and further encoded, so that a symbol is spread across the two or more symbols being communicated. Sequence estimation using, for example, maximum likelihood techniques, as informed by noise estimates relative to the received signal. Each branch metric in computing the path metric of a considered sequence at the receiver is weighted by the inverse of the noise power. It is desirable that the constellation selection, sequence estimation and noise estimation be performed continuously and dynamically. | 11-01-2012 |
20130208783 | TRANSMITTER AND RECEIVER FOR PULSE DENSITY MODULATED SIGNALS AND SIGNAL PROCESSING METHOD - A transmitter (TX) for transmitting a pulse density modulated signal comprises means (SDM) for generating a pulse density modulated input signal (SI) and an encoder (ENC). The encoder (ENC) comprises a first input for receiving the pulse density modulated input signal (SI) and a second input for receiving additional information (AI) comprising at least one data bit. The encoder (ENC) is configured to generate a multi-bit telegram (TG) on the basis of the additional information (AI), the telegram (TG) comprising a predefined bit-sequence, and to replace an appropriate number of consecutive bits of the input signal (SI) with the telegram (TG) in order to generate an output signal (SO). | 08-15-2013 |
20150341191 | IMPROVEMENT TO ACTIVE SIGNALING IN A COGNITIVE WIRELESS TELECOMMUNICATION NETWORK - A method for choosing the sequence of bursts of an access pattern in the primary network of a cognitive wireless network comprising a primary and a secondary network, wherein this access pattern comprises an alternation of listen periods and signaling transmission periods, these periods having various lengths; comprises the steps of computing a random integer X, and then generating a sequence of bursts corresponding to the computed random integer X. In a peculiar embodiment, the random integer X has a geometric distribution with a given probability p. | 11-26-2015 |