99 results about "Frequency profile" patented technology

There is provided method for transmitting binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: independently adjusting the 0 bit mean amplitude relative to the 1 bit mean amplitude; independently adjusting the 0 bit frequency relative to the 1 bit frequency; and independently adjusting time duration of the frequency profile of the 1 bit relative to the time duration of the amplitude profile of the 1 bit, whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit. There is provided a method for transmitting Non-Return-To-Zero (NRZ) binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: the phase across each 1 bit data value is substantially constant, and the phase of the carrier changes across each and every 0 bit by an amount equal to the product of the frequency difference between the 1 bit and the 0 bit and the duration of the 0 bit; whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit. In accordance with one form of the present invention, there is provided a method for transmitting binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: the amplitude profile of the 1 bit is substantially bell-shaped, and the frequency profile of the 1 bit is substantially square-shaped, with steeper rise and fall time and a wider flat top region; whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit.

A computational method and system for the comparison and analysis of different objects of information within a database or collection. All objects are compared in a pair-wise fashion so the relative similarity between each object to every other object in the collection is known. A generalized alignment-free method is described for comparing whole genome (coding and non-coding) DNA sequences is used to investigate the relationship among placental mammalian genomes. Differences in word feature frequency profiles (FFP) are used to derive distance and infer evolutionary relationships.

An aspect of various systems and methods provides, but not limited thereto, novel means for simulating physiological systems and processes in vitro in order to test surgical devices and train practitioners in the use of surgical devices. An aspect of various embodiments further provides in vitro anatomical components, such as a thorax, lungs, heart and pericardium, configured to contain at least one fluid having a pressure-frequency profile that may mimic typical pressure-frequency waveforms of in vivo anatomical fluids. A model communication system may be used to communicate the desired pressure-frequency profiles to the in vitro anatomical fluids. In a further aspect of various embodiments, an access device, e.g. a surgical instrument, configured to sense pressure, frequency, and / or a pressure-frequency profile may be inserted into one or more anatomical components of the in vitro model in order to test the instrument and / or train a practitioner in proper use of the instrument. An access device communication system may be used to communicate data to the practitioner. This data may include, for example, pressure-frequency data and / or the location of a portion of the access device with respect to the various in vitro anatomical components.

The present invention relates to processing apparatus utilising dynamic scaling of voltage (DVS), and in particular although not exclusively to a controller for such apparatus. The invention is especially applicable to software defined radio (SDR), but is not so limited and may be applied to other re-configurable electronic systems. The present invention provides a controller for a processing apparatus having a plurality of processing resources, at least some of said resources having controllable supply voltage and / or frequency; the controller comprising: means for scheduling operations on said resources, at least some of said operations having a predetermined deadline by which the operation must be performed; means for determining a voltage and / or frequency profile for a said operation having a said deadline; and means for instructing the resources to perform said operations according to said schedule and said profile.

A signal of interest (SOI) may be selected from among a plurality of cochannel signals based on one or more internal or external structural feature / s of the SOI, e.g., automatically selected based on any one or more internal or external structural features of the SOI that is known a priori. Examples of such internal structural features include, but are not limited to, number, frequency and / or absolute or relative signal strength (signal to noise ratio) of one or more transmitted signal components (e.g., pilot tones, squelch tones, etc.) present in the SOI; absence of a signal component at a given frequency in the SOI (i.e., present as a “dead spot” at a given frequency within the SOI); signal strength versus frequency profile of the SOI, signal strength versus time domain profile of the SOI, transient characteristics, time versus frequency profile, etc.

The invention relates to a method for determining the distance (a) between a radio beacon (2) and a vehicle device (11) passing in front of said radio beacon, in a road toll system (1). A signal (10) of a frequency having a known temporal profile is emitted. Said method consists of the following steps: the signal is captured in the other component (2, 11) when passing and the temporal profile of the frequency is recorded in relation to the known temporal profile; a modification in the recorded frequency profile (13; 14) exceeding a first threshold value is detected; two distant wave zones in the frequency profile, lying temporally in front of and behind the detected modification, which displays a frequency modification below a second threshold value, are searched for; the recorded frequency profile is scaled in such a manner that the distance wave zones take the predetermined values; and said distance (a) from the scaled frequency path is determined. The invention also relates to radio beacons (2), installations and vehicle devices (11) for implementing the method.