|
Match
|
Document |
Document Title |
|
|
8160119 |
Method and device for anti-interference fighting in a telecommunications system
A method of fighting interference in a frequency-hopping communication system is disclosed. The system has at least one main sensor and one or more auxiliary sensors. According to at least one...
|
|
|
8135354 |
Method and system for chopped antenna impedance measurements with an RFID radio
Described herein are methods, devices and systems for characterizing an attached antenna to an electronic device, such as a radio frequency identification (“RFID”) reader. One exemplary emb...
|
|
|
8095135 |
Method and apparatus for providing seamless call handoff between networks that use dissimilar transmission methods
Call handoff from an 802.1x network to a cellular network, and vice versa. A wireless device that has both cellular and 802.1x capability detects the strength of a cellular signal and of an 802.1x...
|
|
|
8018985 |
CDMA receivers for the golden code
A Generalized Rake (G-Rake) receiver is adapted for Golden code reception in a CDMA system. Signals transmitted by two or more transmit antennas are received at two or more receiver antennas. The...
|
|
|
7986723 |
Delay estimation apparatus and method
Delay estimation apparatus and method, comprising: a correlation step which a correlation function between a received signal and a supplied template waveform is generated, AD conversion step at...
|
|
|
7684770 |
Transmission device and reception device
There are disclosed a transmission device and a reception device having a high secrecy making it difficult to wire tap by a third device. The transmission device includes a modulation section which...
|
|
|
7593140 |
System and method for generating dynamically modifiable timing control signals
A system and method for generating dynamically modifiable timing control signals. Timing waveforms can be changed, for each phase of control, by changing the contents of memory locations and...
|
|
|
7593384 |
Efficient channel quality reporting and link adaptation for multi-carrier broadband wireless communication
Multi-carrier broadband wireless communication can be supported by providing identification information that identifies a group of carrier frequencies that an intended recipient of a transmission...
|
|
|
7580675 |
Data communication apparatus functioning as ID tag and ID-tag reader and writer
A data communication apparatus includes an antenna, an analog front-end circuit, and a controller. The analog front-end circuit is connected between the antenna and the controller and includes...
|
|
|
7376391 |
Wireless data transmission between base station and transponder with encoding/decoding parameter adjusted dependent on header symbol duration
Data encoded in packets modulated onto a carrier wave is transmitted between a base station and a transponder. Each packet includes a header section containing at least a reference symbol, and a...
|
|
|
7376173 |
Unambiguously encoding and decoding signals for wireless channels
A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple...
|
|
|
7363007 |
Adaptive modulation/demodulation method and radio communications systems
Adaptive modulation/demodulation method in a radio communication system is provided. A modulation multi-level number in a transmission device and a demodulation multi-level number in a reception...
|
|
|
7221911 |
Multi-band ultra-wide band communication method and system
The present invention provides ultra-wide band communication systems and methods, including multi-band ultra-wide band communication systems and methods. Methods and systems are provided in which...
|
|
|
7144290 |
Discharge lamp with stabilized discharge vessel plate
The invention relates to a new design of discharge vessel for a discharge lamp, in which dielectrically impeded discharges are to be generated. In this case, a discharge vessel plate 1, 9 is, as it...
|
|
|
7023897 |
Transmission circuit
A transmission circuit includes a baseband circuit, spreading section, multiplier, digital modulator, quadrature modulator, and antenna. The baseband circuit generates and outputs at least one...
|
|
|
6801794 |
Operating state based energy-saving display device
For a terminal for mobile communication which includes a display device it is proposed to save energy by arranging a control device so as to disconnect at least a part of the display device in...
|
|
|
6721539 |
Communications device retroreflecting incident modulated radiation
A communications device such as a personal identity card is in the form of a badge or label worn on the outside of the wearer's clothing. The badge includes a first layer of a transparent material...
|
|
|
6205184 |
System and method for compressing a transmitted signal to achieve narrow and very narrow band frequency or phase modulation
The present system increases the number of channels in a given communication band by using narrow or very narrow band frequency modulation (FM) or phase modulation (PM). The system also improves...
|
|
|
6198908 |
System and a method for transfer of a digital information carrying signal
A system and a method for transfer of a digital information carrying signal 51 between an input of a transmitter and an output of a receiver. The information carrying signal is modulated in a...
|
|
|
6034573 |
Method and apparatus for calibrating modulation sensitivity
A method and apparatus for continuously calibrating the modulation sensitivity of a voltage controlled oscillator (VCO) within a modulator of a transmitter. In accordance with the present...
|
|
|
5983077 |
Systems and methods for automatic deviation setting and control in radio transmitters
A frequency modulation (FM) radio transmitter, such as a cellular telephone, includes an automatic deviation control system to automatically compensate for varying sensitivity of the FM...
|
|
|
5907808 |
Handover with fast moving mobile station detection between a microcell and a macrocell
In a hierarchical micro/macro-cell network, a mobile station will be handed over from a microcell to a macrocell if a number of microcells recognize the mobile station as fast, so that the fast...
|
|
|
5832022 |
Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals
A transceiver uses feedback control to monitor a transmitted continuous phase modulation (CPM) waveform, such as a spread spectrum CPM waveform, and adjust the modulation index in response thereto....
|
|
|
5633893 |
Digital modulation method with controlled envelope variation
Continuous phase modulated (CPM) signals, such as quaternary CPFSK signals, are filtered to limit their bandwidth while simultaneously minimizing the amount of amplitude modulation and intersymbol...
|
|
|
5592132 |
Frequency modulator comprising an adjusting circuit
In a frequency modulator (1) having an adjusting circuit by which frequency modulator an applied luminance signal of a color video signal that contains synchronization pulses is frequency...
|
|
|
5590402 |
Multi-mode transmitter for transmitter for signals having varying deviation levels
A dual-mode transmitter (100) adjusts a signal's deviation level when switched between a wideband mode and a narrowband mode of operation. The transmitter (100) automatically attenuates the...
|
|
|
5590417 |
Radiotelephone apparatus including a wireless headset
A radiotelephone includes a multifunctional headset that operates in two different modes. According to a first mode, the headset may be mounted on a radiotelephone body where it serves as a speaker...
|
|
|
5513219 |
Apparatus and method for transmitting information with a subminimally modulated transmission signal
Applicant's invention includes an apparatus and associated method for transmitting information at a high rate using an undermodulated frequency shift keyed signal. The transmission rate is...
|
|
|
5423071 |
Monitoring and alarm circuitry for a base station transmitting supervising signals to one or more mobile radio stations
A base station is provided which supervises the quality of a radio link and including a generator circuit for generating a supervising signal having a desired baseband frequency, a measuring...
|
|
|
5170486 |
Apparatus for synthesizing a composite RF signal suitable for use as a test signal in testing adjacent channel rejection of radio receivers
Apparatus for synthesising a composite signal (53) which has spaced first and second frequency channels of which each has an independently predetermined power, the power of the first channel being...
|
|
|
4907087 |
Transmission of signals through analog channels using adaptive frequency modulation
Improved effifiency of frequency-modulated (FM) transmission of signals through analog channels, i.e., achievement of a higher bandwidth and/or signal-to-noise ratio (SNR) in the received signal...
|
|
|
4775995 |
Adaptive splatter control
An improved arrangement and method for use in a radio communication system is disclosed which makes possible mobile radio channel assignments on narrower channel spacings with a minimum amount of...
|
|
|
4581749 |
Data frequency modulator with deviation control
An automatic deviation control circuit for an angle modulated data transmitter is disclosed wherein the deviation level of modulated data is controlled by a modulation cancelling deviation error...
|
|
|
4554517 |
Device for the automatic linearization of the control signal-frequency characteristic of a frequency-modulated variable frequency oscillator
A phase lock loop having an instruction input to which is applied the output signal of the frequency-modulated variable frequency oscillator. The pass band of the loop is regulated in order to...
|
|
|
4363132 |
Diversity radio transmission system having a simple and economical structure
In a system for frequency-diversity transmission, separate and distinct frequency carriers are obtained from the frequency modulation of an oscillator by a pure frequency with an index such that a...
|
|
|
4281348 |
Television signal receiving apparatus
In apparatus for receiving a television signal which is made by a frequency-modulation by a video signal, the improvement is that a band-pass filter provided in the receiver for selectively taking...
|
|
|
4223282 |
Method of reducing interference components in a frequency modulated signal and device for carrying out said method
A method of reducing interference components in a frequency-modulated carrier signal in which the modulating signal contains a composite color television signal with a chrominance signal modulated...
|
|
|
4062632 |
Constant modulation index technique for measuring the derivatives of device parameters
Described is a technique for generating directly certain derivatives of device parameters by measuring the device response to ac modulation under conditions of constant modulation index. In...
|
|
|
3967202 |
Data transmission system including an RF transponder for generating a broad spectrum of intelligence bearing sidebands
A data transmission system for obtaining information from a plurality of data sources includes an interrogate source for transmitting RF interrogate signals to the locations of the data sources and...
|
|
|
3866122 |
FM communication system
This FM communication system includes a first FM carrier system having a first FM deviation determined by a first FM index, a second FM carrier system having a second FM deviation determined by a...
|
|
|
3729678 |
PCM SYSTEM INCLUDING A PULSE PATTERN ANALYZER
A delta pulse code modulation system includes a feedback loop comprising a pulse pattern analyzer for detecting a large instantaneous modulation index within a fixed time interval. The system...
|
|
|
3648178 |
MULTIPLEX FM TRANSMITTER
A first variable attenuator is coupled between the FDM baseband source and the FM modulator. The output signal of the first attenuator is RMS detected to provide a control signal for this...
|
|
|
3627949 |
DIGITAL DATA TRANSMISSION SYSTEM
A system for transmission of digital data on telephone-type voice circuits, which is compatible with conventional transmission equipment while being considerably smaller in size and weight. A...
|
|
|
3396340 |
Constant deviation ratio fm transmitter
|
|
|
3350643 |
Signal-to-noise ratio estimating by taking ratio of mean and standard deviation of integrated signal samples
|
|
|
3334300 |
If carrier fm transmission system
|
|
|
3327216 |
Arrangement for minimizing effects of noise by automatic frequency deviation controlin fm communication systems
|
|
|
3324243 |
Fm recording and playback
|
|
|
3271679 |
Frequency modulation communication system having automatic frequency derivation control in response to received thermal noise
|
|
|
3195047 |
Frequency modulation communication system having automatic frequency deviation adjustng means
|