US8723720B2 - Wireless Location Detection And/or Tracking Device And Associated Methods - Google Patents > 자유게시판

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More significantly, it may be useful to use the beacon to find out a location of an object or iTagPro tracker particular person, similar to a firefighter within a constructing, for example. Beacons could even be deployed to reinforce navigational capabilities, akin to providing 3D navigation for ships within ports. GPS-decided location could also be included within the return signal from a conventional navigation beacon. This configuration gives the bottom latency potential and minimizes return delay. RF emissions of the RF receiver, generating an RF signal on an RF frequency that may be received by the RF receiver, and detecting a variation within the receiver RF emission or emissions attentive to the RF sign. RF emission contains small adjustments in a number of of the amplitude, section, or frequency of a number of native oscillator indicators, harmonics thereof, or mixing merchandise within the receiver. RF signal can be utilized to trigger a phase, frequency, amplitude, or mixture of part, frequency, or amplitude modulation of certain alerts within the receiver.

If the delay is some fraction of a pattern, the peak may be smeared in the correlation. This could also be tremendously affected by noise and multipath, iTagPro tracker for example. This multi-service waveform could also be used to enhance time decision and vary accuracy. RF interrogator could also be configured to generate the multi-provider base waveform as a multi-carrier orthogonal frequency division multiplexed (OFDM) base waveform, for example. 2.6 dB, whatever the variety of subcarriers, for efficient transmission utilizing a energy amplifier. RF frequency to the distant wireless machine, similar to a beacon system. The channel estimate may be based upon a mathematical inversion of the ratio of the received-to-transmitted sounder waveform, iTagPro tracker for instance. Frequency offset could end result from Doppler because of a cell RF interrogator, cellular wireless beacon, ItagPro or each. Frequency offset may occur from the LO frequency on the wireless beacon. RF interrogator may additionally process the frequency area knowledge by at least lowering noise within the channel estimate and eradicating frequency offset.

RF interrogator to the wireless beacon with the intention to estimate an correct distance, known as advantageous range decision. Size, Weight, and Power (SWAP). Radio Frequency (RF) interrogator transmitting at a first frequency and iTagPro tracker receiving at a second frequency. LO signal at a third frequency. LO. The mixer is configured to generate an outgoing beacon signal to the antenna on the second frequency based mostly upon mixing an incoming signal from the RF interrogator at the first frequency with the LO sign at the third frequency. With the intention to perform the frequency conversion process from acquired RF indicators to IF, superheterodyne receivers generally carry out a mixing operation that entails two alerts. These indicators include a signal produced by the native oscillator and an incoming RF sign. This process is performed in a mixer or mixing stage of the receiver. Inside the mixer, the local oscillator signal interacts with the acquired RF sign to supply outputs known as mixing merchandise at frequencies which are equal to the sum of the 2 enter frequencies and difference of the 2 enter frequencies.

Other mixing products are additionally produced which can be integer multiples of the sum and difference merchandise, and are typically decrease in amplitude than the sum and distinction merchandise. RF signal and the LO signal. LO signal and without any decoding of the incoming sign. An input antenna may be configured to receive the incoming sign, and ItagPro an output antenna configured to transmit the outgoing beacon sign, with the mixer being coupled therebetween. This idea may be expanded to incorporate a number of input antennas, output antennas, and mixers for Multiple-Input/Multiple Output (MIMO) operation. Filters could also be coupled between the one or more input antennas and one or more mixers, and/or between a number of mixers and the a number of output antennas. Modulation could also be supplied on the beacon to perturb the return signal for distinguishing between beacons and/or encoding data. Encoded information may embody beacon identification quantity, serial number, sensor data, or different person data.