Ads
related to: high prf vs low volume trading view downloadget.thetradingpub.com has been visited by 10K+ users in the past month
Search results
Results From The WOW.Com Content Network
High PRF is limited to systems that require close-in performance, like proximity fuses and law enforcement radar. For example, if 30 samples are taken during the quiescent phase between transmit pulses using a 30 kHz PRF, then true range can be determined to a maximum of 150 km using 1 microsecond samples (30 x C / 30,000 km/s).
The received signals from multiple PRF are compared using the range ambiguity resolution process. Each range sample is converted from time domain I/Q samples into frequency domain. Older systems use individual filters for frequency filtering.
The Nyquist frequency will also change when the PRF is changed. This is explained best using an example with 2 different PRF, although real systems use a different method. In the example, PRF A can detect true speed up to 600MPH and PRF B can detect true speed up to 500MPH.
The difference between the sample numbers where reflection signal is found for these two PRF will be about the same as the number of the ambiguous range intervals between the radar and the reflector (i.e.: if the reflection falls in sample 3 for PRF 1 and in sample 5 for PRF 2, then the reflector is in ambiguous range interval 2=5-3).
Radar designers try to use the highest PRF possible commensurate with the other factors that constrain it, as described below. There are two other facets related to PRF that the designer must weigh very carefully; the beamwidth characteristics of the antenna, and the required periodicity with which the radar must sweep the field of view.
The one tricky thing about putting money into a high-yield savings account versus a CD is that your interest rate can fluctuate. And if the Fed continues to cut interest rates this year, we could ...
The PVI is recalculated when the trading volume increases from the previous period, and the NVI is recalculated when the trading volume decrease from the previous period. [8] These two metrics, when put together, show how volume is affecting the price of a security. A change in PVI indicates that prices are driven by high volumes.
Image source: Getty Images. 1. Lockheed Martin. After its stock price reached an all-time high earlier this year, Lockheed Martin and its defense contractor peers have sold off considerably over ...