Here, we will discuss What is the processing gain of radar?, What is the processing gain of a signal?, What is the RF processing gain?
What is the processing gain of radar?
Radar processing gain refers to the improvement in signal-to-noise ratio (SNR) achieved by coherent integration or other signal processing techniques. It allows radar systems to more effectively detect weak signals against background noise. Coherent integration involves adding multiple coherently received pulses, aligning their phases to strengthen the desired signal, and averaging the noise. This process increases SNR, extending radar range and improving target detection capabilities, especially for weak radar cross-section targets or in noisy environments.
What is the processing gain of a signal?
The processing gain of a signal refers to the ratio of the signal power after processing to the signal power before processing. It is typically used in communication systems using deviation spectrum techniques, such as direct scatter spectrum (DSSS). In spread spectrum systems, the signal is distributed over a wider bandwidth using a pseudorandom code sequence, effectively increasing the signal power over the background. This processing gain improves signal robustness, resistance to interference and provides better coverage and reliability in communication.
What is the RF processing gain?
RF processing gain in radar refers to the improvement in received signal strength achieved through front-end processing of the radar receiver. This processing involves amplifying and filtering received radio frequency (RF) signals to increase their power relative to the noise level. By increasing the resistance of the RF signal before additional signal processing and detection, the RF processing gain improves radar sensitivity, extends the detection range, and improves the overall performance of the radar system in detecting and tracking targets.
Direct sequence deviation spectrum (DSSS) processing gain is the increase in signal robustness obtained by spreading the signal spectrum over a wider bandwidth compared to the original data rate. In DSSS systems, the signal is modulated with a gap code that extends the bandwidth of the transmitted signal. This propagation efficiently distributes signal energy over a wider frequency range, making it more resilient against narrow-band interference and jamming. Processing gain in DSSS systems is the ratio of the spreading signal bandwidth to the original signal bandwidth, quantifying the improvement in signal quality and reliability.
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