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In receiving antennas, sidelobes may pick up interfering signals, and increase the noise level in the receiver. The power density in the sidelobes is generally much less than that in the main beam. It is generally desirable to minimize the sidelobe level (SLL), which is measured in decibels relative to the peak of the main beam. The main lobe ...
Barker codes of length N equal to 11 and 13 are used in direct-sequence spread spectrum and pulse compression radar systems because of their low autocorrelation properties (the sidelobe level of amplitude of the Barker codes is 1/N that of the peak signal). [15]
Other metrics that can be seen are the width of the main lobe and the peak level of the sidelobes, which respectively determine the ability to resolve comparable strength signals and disparate strength signals. The rectangular window (for instance) is the best choice for the former and the worst choice for the latter.
In the frequency domain, it determines the trade-off between main-lobe width and side lobe level, which is a central decision in window design. Sometimes the Kaiser window is parametrized by β, where β = πα. For digital signal processing, the function can be sampled symmetrically as:
PSL's top level is built around the following: [4] Activity, a class or type of action, such as install-part, which is the class of actions in which parts are installed Activity-occurrence, an event or action that takes place at a specific place and time, such as a specific instance of install-part occurring at a specific timestamp
The Trump administration ordered all heads of federal departments and agencies Thursday to provide lists of their lowest-performing employees.
Image source: Getty Images. 1. Cost increases for Parts A and B. Original Medicare's premiums and deductibles went up in 2025. The Part A annual deductible increased from $1,632 to $1,676, and the ...
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. [1] This is achieved by combining elements in an antenna array in such a way that signals at particular angles experience constructive interference while others experience destructive interference.