211 results about "Angle modulation" patented technology

A method for ongoing power control for a communication station with a multiple antenna array, the power control using a method for signal quality estimation applicable for angle modulated signals. One aspect of the ongoing power control method is applicable for the uplink and includes separating the joint determination of a receive weight vector and ongoing power control into a receive weight vector determining part and a separate transmit power adjustment part. In one embodiment, the ongoing power control method for the downlink includes separating the joint determination of a receive weight vector and ongoing power control into a receive weight vector determining part and a separate transmit power adjustment part. The method starts with one part, for example transmit power assignment. Receive weight vector determination is carried out with this assigned transmit power, and the new weights used. An estimate of the resulting received signal quality is obtained and used for new ongoing power adjustment. Another aspect is applicable for the downlink and includes one aspect of the ongoing power control method is applicable for the uplink and includes separating the determination of a complete transmit weight vector including the vector of relative transmit weights and the scaling to use with the relative transmit weights into a part for determining a set of relative transmit weights and a separate transmit power adjustment part that determines the scaling factor.

The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes small becomes the first prescribed value; and/ or (2) the waveform shaping means in which, when the magnitude of the amplitude signal to be inputted becomes larger than the second prescribed value which is larger than the first prescribed value, the waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes larger becomes the second prescribed value; and an amplitude modulator for amplitude modulating the signal of the output of the angle modulator by the signal of the output of the waveform shaping means.

A multifunction spectrograph based on surface plasma wave consists of light source, modulation unit of incoming light, modulation unit of angle, sample conveying unit, sample electromagnetic coupling reactor, detection unit of emission light, detection unit of reflection light, data collection/management unit and temperature control unit. It is featured as coupling and resonating plasma at surface of incoming-light wave resultant sensing film by said spectrograph for making fade field at surface of said sensing film be intensified so as to excite scattered light by utilizing intensified fade field.

Provided is a transmission circuit which is small in size, operates with high efficiency, and outputs a transmission signal having high linearity. A signal generation section 11 generates an amplitude signal m(t) and a phase signal. An angle modulation section 17 angle-modulates the phase signal to output an angle-modulated signal. An amplitude calculation section 12 outputs a discrete value signal V(t) having a plurality of discrete values corresponding to a magnitude of the amplitude signal m(t). A dividing section 13 divides the amplitude signal m(t) by the discrete value signal V(t) to output an amplitude signal M(t). A delta-sigma modulation section 14 delta-sigma modulates the amplitude signal M(t) to output a delta-sigma modulated signal. A variable gain amplifier section 15 amplifies the delta-sigma modulated signal by a gain corresponding to the discrete value signal V(t). An amplitude amplifying section 16 supplies, to an amplitude modulation section 18, a voltage corresponding to a magnitude of the delta-sigma modulated signal. The amplitude modulation section 18 amplitude-modulates the angle-modulated signal by the voltage supplied from the amplitude amplifying section 16, to output a modulation signal.

This invention multifunction imager is made based on the surface plasma resonance phenomenon composed of p-polarized parallel light sources, a light incident angle modulation system, a sample transport and analysis system, a reflection light cut-away and modulation system, a detector, and a data register and process system. Said device utilizes the dispersion of P-polarized light and a prism to activate the resonance of sensing film surface plasma to test resonance signals. The resonance image signal or wave length scan resonance signal can be tested by conversion of light sources, the chip research result can be reached by micro-lattice process to sense film to realize spectrum conversion of image and resonance wavelength.

A transmission circuit is provided which can output a stable transmission signal independently of the temperature characteristics of an amplitude modulating section. A signal generating section generates an amplitude signal and a phase signal. A regulator supplies a voltage which is controlled, depending on the amplitude signal, to the amplitude modulating section. An angle modulating section subjects the phase signal to angle modulation to output an angle-modulated signal. A temperature detecting section outputs temperature information of the amplitude modulating section. A gain control section controls a gain of a variable gain amplifier based on the temperature information of the amplitude modulating section. The variable gain amplifier amplifies the angle-modulated signal using the gain controlled by the gain control section. The amplitude modulating section subjects the angle-modulated signal to amplitude modulation using a voltage which is controlled, depending on the amplitude signal, to output an amplitude-modulated signal.

The invention discloses a long-range surface plasma resonance sensor and a preparation method thereof. The sensor is formed by bonding a BK7 prism and a glass slide through cedar oil, wherein the outer surface of the glass slide is plated with a magnesium fluoride thin film, a silver film and a gold film in turn; the gold film is directly contacted with biological solution to be detected and is used for detecting the biological solution in a mode of angle modulation; magnesium fluoride with the refractive index of about 1.38, which is close to that of the biological solution, can form approximatively symmetric structures on two sides of a metal conductive layer so as to ensure that surface plasmas on the two sides of the metal conductive layer are coupled to form the long-range surface plasma; compared with other metals, the metal silver used as the conductive layer has a narrower half band width of a resonance absorption peak, but has unsteady chemical properties; a conductive layer gold film can make a resonance angle generate a greater transition along with the change of the refractive index of the biological solution to be detected; simultaneously, the conductive layer gold film has stable chemical properties and high biological affinity. The specific multilayer film structure can integrate the advantages of each film and effectively improve the sensitivity of biological sensors.

A compact transmission circuit for outputting a highly linear transmission signal regardless of the output power level and operating at a high efficiency is provided. A signal generation section 11 generates an amplitude signal and quadrature data based on input data. A calculation section 21 calculates using the amplitude signal and the quadrature data to output a discrete value having a level discrete at every predetermine time period, and first and second phase signals. An amplitude amplification section 17 outputs a voltage controlled in accordance with the discrete value. Angular modulation sections 13 and 14 angular-modulate the phase signals and output first and second angle-modulated signals. Amplitude modulation sections 15 and 16 amplitude-modulate the angle-modulated signals with the voltage from the amplitude amplification section 17 and output first and second modulated signals. A combining section 18 combines the first and second modulated signals and outputs a transmission signal.

The invention discloses a method for realizing co-frequency full duplex wireless communication, which belongs to the field of wireless communication, aims to overcome defects of two basic duplex methods,namely, frequency division duplex (FDD) and time division duplex (TDD), of wireless communication, that is, FDD occupies wide frequency band and TDD is low in time availability, and consequentially realizes co-frequency full duplex wireless communication. According to the invention, both parties involved in communication have same signal band, receive and transmit signals simultaneously; angle modulation is taken as a signal modulation manner, and a sent radio-frequency signal is taken as a local oscillation signal of a receiver; the coherent reception technology is adopted for separating transceiving signals in the same frequency band; and a series of technologies including direct frequency conversion, signal offset, DC removal and adaptive filtering are combined to realize the purpose of co-frequency full duplex wireless communication. The method can be used for miniwatt bothway wireless communication.

Provided is a transmission circuit 1 which precisely compensates for an offset characteristic of an amplitude modulation section 15 and which operates with low distortion and high efficiency over a wide output power range. A signal generation section 11 outputs an amplitude signal and an angle-modulated signal. An amplitude amplifying section 14 supplies, to the amplitude modulation section 15, a voltage corresponding to a magnitude of an inputted amplitude signal. The amplitude modulation section 15 amplitude-modulates the angle-modulated signal by the voltage supplied from the amplitude amplifying section 14, thereby outputting a resultant signal as a modulation signal. A temperature measuring section measures a temperature of the amplitude modulation section 15. An offset compensation section 12 calculates an offset compensation value in accordance with a change, in temperature of the amplitude modulation section 15, from the temperature of the amplitude modulation section 15 in an initial state, and adds the calculated offset compensation value to the amplitude signal.

The invention discloses an adjustable lightning rod. The adjustable lightning rod comprises an installation disc, wherein no less than two installation holes are formed in the upper surface of the installation disc, a groove is formed in the middle part of the upper surface of the installation disc and fixedly connected with a bearing disc via a shock absorption device arranged in the groove, a motor is arranged on the upper surface of the bearing disc and engaged with a transmission device via a tooth disc sleeving a rotation shaft, the transmission device is fixedly arranged on the installation disc via a support, the top of the transmission device is further provided with a telescopic post, and the top of the telescopic post is movably connected with an angle modulation plate via the rotation shaft arranged at the bottom of the angle modulation plate. By arranging the transmission device and the telescopic post, the lightning rod and a lightning ball are more convenient and rapid to adjust and install, and the influence of an external environment on lightning rod installation is reduced; and moreover, with the arrangement of the shock absorption device, the adjustment of the lightning rod and the lightning ball is more firm, and the influence of shock on lightning rod adjustment is reduced.

The invention relates to a novel gyro north seeker and a north seeking method. The novel gyro north seeker is composed of a gyro (1), an angle modulator (2), a rotary table (3), a photoelectric encoder main raster code disc (4), a photoelectric encoder direction identification disc (5), a base (6), foot screws (7), a leveler (8), a pedestal (9), a motor (10), a transmission mechanism (11), a modulation signal source (12), and a signal processing system (13). The invention provides the north seeking method consisting of: applying a periodic angular motion modulation signal to the gyro (1) by the angle modulator (2), changing direct measurement of a gyro (1) output intensity signal to measurement of a gyro (1) output frequency signal, and at the same time employing a synchronous tracking mode, and using the motor (10) to keep the periodic motion center of the angle modulator (2) coinciding with the north direction, i.e. psi0=0, and taking psi0=0 as a closed loop control condition to construct the north seeking method of a gyro north seeker closed loop system. Due to the employment of angle modulation and synchronous tracking technologies, the gyro north seeker based on the north seeking method greatly reduces the requirements for gyro technical indicators, improves the north seeking precision and anti-interference ability, and can realize rapid and high precision north seeking.

An apparatus for providing an angle modulated signal includes a tunable oscillator circuit, a variable time delay circuit, and an optional scaling and delay control apparatus. The tunable oscillator circuit generates an oscillatory signal having a predetermined frequency. The variable time delay circuit operates to delay the oscillatory signal in accordance with time varying changes in an angle control signal, thereby producing the desired angle modulated signal. The scaling and delay control apparatus is configured to scale the angle control signal to account for frequency dependent phase delays of the oscillatory signal through the variable time delay circuit. The methods and apparatus of the present invention may be advantageously used in RF transmitters and receivers, such as in a polar transmitter, where the oscillatory signal generated by the tunable oscillator apparatus serves as a carrier signal, and the angle control signal used to control the delay of the variable time delay circuit comprises a phase modulation signal from the phase path of the polar transmitter.

The transmission of a data signal (DS) in the form of data packets takes place by means of angular modulation, preferably two or three stage difference phase modulation. The header (HEAD) is transmitted by means of polarization modulation. An additional channel formed in this way is also available for the transmission of additional information. To separate the header (HEAD), the multiplex signal (DHS) is aligned in a specific polarization level, so that the header can be separated without any problem. A new header can be added without having to convert the data signal into an electrical signal beforehand.

A method for calculating zero-crossing reference sequences ({t_i}) for the data detection of a sequence of zero crossings ({{circumflex over (t)}_i}) of a received signal is disclosed. The data detection is determined in a receiver, wherein the received signal is based on a data symbol sequence ({d_k}) angle-modulated at a transmitter and transmitted to the receiver. The zero-crossing reference sequences ({t_i}) are calculated in accordance with an equation specifying an output of a finite state machine that describes, at least approximately, the signal generation in the transmitter.

Methods and apparatus for reconstructing discrete-time amplitude modulation signals in polar modulation transmitters. An exemplary polar modulation transmitter includes a symbol generator, a rectangular-to-polar converter, a peak phase detector, and an amplitude modulation reconstruction circuit. The symbol generator generates rectangular-coordinate modulation symbols from which the rectangular-to-polar converter generates an amplitude modulation signal containing discrete-time amplitude samples and an angle modulation signal containing discrete-time angle samples. The peak phase detector circuit detects phase reversals or near phase reversals represented in samples of the angle modulation signal. The amplitude modulation reconstruction circuit responds by reconstructing samples in the amplitude modulation signal that correspond to detected phase reversals or a near phase reversals represented in samples of the angle modulation signal.