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7596185 |
Radio transmitter with variable amplifier units in the baseband section and in the radio-frequency section of the transmission path
The invention relates to a radio transmitter for the transmission of transmission signals. Signals to be transmitted are processed to form transmission signals by the transmission path of the radio...
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7583702 |
Method of transmitting paging indicator and notification indicator and corresponding modulation and demodulation devices
The present invention discloses a method of transmitting a first signal and a second signal in a wideband code-division multiple access network, wherein a probability of the appearance of signal...
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7570705 |
GMSK modulation using a dual-port memory
A GMSK modulator includes a dual-port memory, an address generator and a signal provider, where the dual-port memory respectively outputs in-phase and quadrature phase waveform data to first and...
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7564923 |
Frequency offset and method of offsetting
A transmitter digital signal processor (DSP) circuit has a transmit frequency represented by n-bit data output from a look up table (LUT). The n-bit data is outputted to an n-bit accumulator...
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7542520 |
Apparatus and method for implementing a low complexity digital modulator
A low complexity digital modulator, which is particularly useful for providing Gaussian frequency shift keying (GFSK) modulation, includes a filter, an integrator and a look-up table (LUT) stage....
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7495520 |
Modulation device using frequency-shift keying
A frequency-shift modulation device includes an oscillating circuit, a phase-locked loop and a digital frequency modulation circuit. The oscillating circuit is connected to the phase-locked loop in...
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7447552 |
Common transmission protocol system for an automation device
An automation device is disclosed, in which a multiplicity of physically distributed functional units communicate with each other by means of a common transmission protocol. The device has a...
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7436263 |
Apparatus and method for presenting a modulated output signal at an output locus
An apparatus that presents an output signal that is modulated by input signal includes: (a) A signal source providing a signal at a reference frequency. (b) A frequency comparer coupled with the...
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7369009 |
Oscillator device for frequency modulation
The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator ( 1 ) with automatic amplitude control ( 5, 6, 7 ) is provided....
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7349488 |
Frequency shift keying signaling for integrated circuits
The present invention relates to a system for communicating between two integrated circuits (ICs) or within an IC. The ICs are either on the same circuit boards or on different circuit boards with...
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7292107 |
Modulation method and apparatus with adjustable divisors of the dividers in phase-locked loop
A modulation method and a modulation apparatus in a phase-locked loop (PLL) provided. The modulation apparatus comprises a modulator, a crystal oscillator, a controllable R-divisor frequency...
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7271678 |
Apparatus and method for generating frequencies
A frequency generation apparatus and a method are provided. The frequency generation apparatus for generating a plurality of center frequencies for use in multi-band hopping communication,...
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7271677 |
Inductive data and power link suitable for integration
A system providing an inductive power and data link between an external transmitter and miniature internal receiver is presented. The system is suited to applications where the receiver must be of...
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7249008 |
Arrangement for runtime compensation of a runtime difference arising through emulation of a high frequency signal
An arrangement for runtime compensation of a runtime difference, arising through emulation of a high frequency signal, is disclosed, with a signal x(t), for emulation by a signal processing device,...
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7227909 |
High-quality power ramping in a communications transmitter
The present invention, generally speaking, provides for control of a modulator, such as a polar modulator or conventional linear modulator, to produce high quality RF signals that ramp quickly from...
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7205859 |
Method and apparatus for sub sample-per-symbol demodulator for a spectrally efficient waveform with an LPI feature
An apparatus and method for transmitting and receiving a communication signal includes selecting a pulse shape for a continuous phase modulated waveform, encoding specific information into the...
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7177370 |
Method and architecture for dual-mode linear and saturated power amplifier operation
An RF transmitter provides both GSM and EDGE capability by implementing collector voltage control over the power transistor(s) in a power amplifier. During EDGE mode, linear base-biasing a power...
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7129802 |
Method for estimating a carrier leak, an estimator and modulation system provided with automatic control of a carrier using said system
The invention relates to a method of estimating a carrier leak making it possible to solve the accuracy degradation problem associated with a poor reception by the central carrier. A subject of...
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7106807 |
Method for estimating the frequency shift of a CPFSK signal
A method for estimating the frequency shift of a CPFSK signal includes scanning the CPFSK signal. Intermediate signal values are determined for the scanned CPFSK signal. An estimated value (ν) is...
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7103113 |
Analog FSK modulator for a radio transmitter
A transceiver includes a transmitter portion with an analog modulator that modulates data using frequency shift keyed (FSK) modulation techniques to increase efficiency, reduce power consumption,...
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7065157 |
GMSK modulation techniques
This disclosure is directed to digitally implemented GMSK modulation techniques. The digital GMSK modulation techniques make use of a lookup table (LUT) and mapping logic to digitally generate GMSK...
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7009601 |
System and method for test data reporting using a status signal
In-flight entertainment systems provide entertainment for passengers on commercial airline flights. Presently, usually on longer flights, video entertainment is commonly available on in-flight...
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6973141 |
Flexible multimode QAM modulator
A method of baseband/passband digital modulation for a data transmission system wherein a plurality of data symbols is transmitted over a transmission channel at a symbol rate. The method comprises...
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6925136 |
Simultaneous frequency and phase synchronizer
A frequency and phase synchronizer system comprises a processor for executing a sequence of operations, which include: a) initializing a frequency error estimate value and phase error estimate...
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6834084 |
Direct digital polar modulator
A polar modulator creates an amplitude signal and a frequency signal and digitally adjusts the signals so that the frequency and amplitude signals arrive at the power amplifier at the appropriate...
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6774738 |
Trimming method for a transceiver using two-point modulation
In a method for amplitude trimming in transceivers having a PLL circuit operating on the two-point modulation principle, the amplitude of an analog modulation signal is selected on the basis of a...
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6674334 |
Oscillator having surface acoustic wave resonator and oscillation circuit
An oscillator is provided that can be flexibly retrofitted to become usable for a wide range of applications, that is compatible with different users'requests, and that enables a user to design a...
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6603368 |
High data rate vector demodulator
A demodulator for demodulating clear mode waveforms such as Phase Shift Keyed and Quadrature Amplitude Modulated waveforms, is capable of demodulating signals with much greater data rates than the...
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6600382 |
Microwave phase modulator
A phase modulator for direct wideband linear phase modulation of a microwave continuous wave carrier signal which is suitable for many analog and digital phase or frequency modulation techniques....
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6546060 |
Direct modulating FSK transmitter for MCA
A direct modulating frequency shift keying transmitter for multi channel access is constructed so that a transmission signal from a voltage controlled oscillator (VCO) in a phase lock loop...
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6480553 |
Gaussian frequency-shift keying transciever for ISM wideband communication
A GFSK (Gaussian Frequency Shift Keying) radio transceiver is provided for ISM (Industrial Scientific and Medical) wideband communication. The GFSK radio transceiver includes a transmitter for...
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6452461 |
High-speed power-efficient coded M-ary FSK modulator
A high-speed power-efficient coded M-ary Frequency-Shift Keying (M-ary FSK) modulator. The modulator includes a coding logic, which generates (M/2) Gray code signals in accordance with an (N−1)...
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6441694 |
Method and apparatus for generating digitally modulated signals
A method and apparatus for generating digitally modulated signals in which a serial data stream of digital signals to be modulated ( 70 ) is provided, the serial data stream being converted into...
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6438176 |
Digital gaussian frequency shift keying modulator
A GFSK modulator suitable for use in an RF communication system comprising a modular subsystem and a baseband processor subsystem which is implemented digitally. The baseband processor subsystem...
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6430232 |
Phase constellation modulator
The present invention provides a method and apparatus for implementing a continuous phase modulation with an approximate phase constellation. The method reduces complexity by using fewer than all...
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6396355 |
Signal generator having fine resolution and low phase noise
A signal generator includes an oscillator, a phase locked loop and a fractional divider. The oscillator is configured to provide an output signal. The phase locked loop is configured to receive the...
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6392499 |
Frequency shift modulation circuit
A frequency shift modulation circuit has a direct digital synthesizer DDS and a phase-locked loop PLL. DDS stores output signal frequency data in a plurality of registers. DDS selects the register...
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6369666 |
Modulator circuit configuration
The circuit for combined operation of a mobile radio with GMSK and 8-PSK modulation includes a transmission PLL for GMSK operation, and a direct modulator for 8-PSK operation. A transmission...
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6324603 |
Data transmission system and game system using the same
To provide a new data transmission system between a game device and related peripheral devices, and a device using same. Serial transmission data is divided into an odd-numbered bit sequence and an...
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6317009 |
Frequency shift key modulating oscillator
The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the...
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6307441 |
Shape modulation transmit loop with digital frequency control and method for same
A shape modulation transmit loop with digital frequency control permits spectral shaping of a digital pulse stream (12) by controlling the slew rate of the transition signal (16) between successive...
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6275539 |
System and method for modulating a frequency signal
A radio frequency transmitter circuit including a user input switch for producing an input signal, an oscillator for producing a frequency signal having a first frequency, an antenna connected to...
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6236689 |
Device comprising a phase-locked loop, electronic apparatus comprising such a device and method of modulating the frequency of an oscillator
A frequency shift keying device includes a reference oscillator which provides a reference signal, and a controlled oscillator having a control input and an output signal. A phase detector compares...
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6201451 |
MSK modulator and MSK modulation method of transmitting data at high speed and digital signal generator suitable for MSK modulation
An MSK modulator which performs an accurate MSK modiation with high speed digital data is provided. When a to-be-modulated digital signal is provided from a code generator 1, a bidirectional shift...
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6185259 |
Transmitter/receiver for GMSK and offset-QAM
A transmitter encodes a number 2N data bits by using N data bits to select one of 2 N levels of a cosine wave and the other N data bits to select one of 2 N levels of a sine wave. The modulation...
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6172574 |
Quartz crystal oscillator frequency modulation circuit
The present invention relates to a voltage-controlled quartz crystal oscillator, including an oscillation transistor, the base of which is connected to a first terminal of a quartz crystal and the...
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6169767 |
Universal network interface module
A variable rate modulator for selectively encoding a variable rate data stream according to one of a plurality of modulation formats. A timing and control circuit locks the variable rate data to a...
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6163229 |
Frequency generator for generating two independent FSK signals
A frequency generating circuit scales a warp range of a frequency signal. The frequency generating circuit includes a first frequency signal (10) having a first offset signal with a first frequency...
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6157271 |
Rapid tuning, low distortion digital direct modulation phase locked loop and method therefor
A direct modulation phase lock loop (PLL) a voltage controlled oscillator (VCO) (114). A divider (118) has a first divider input coupled to the VCO and a second divider input to receive a...
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6151366 |
Method and apparatus for modulating signals
A signal modulator includes a digital signal processor, an address buffer, a counter, and a first memory device. The digital signal processor is adapted to receive digital data at a receive...
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