Tradeoff of Hardware and Signal-to-Noise Ratio in Moving Target Indicators.
Abstract
In many radar systems the signal processor contains a moving target indicator which is a high pass filter used for clutter rejection. It can be implemented by either an infinite or finite impulse response filter. Due to transient and hardware considerations, the finite impulse response is the configuration most often used. There are two major alternatives for realizing the finite impulse response filter. In radar terminology these have become known by names such as the moving window (or sliding window) and the fixed window (or block window) methods. The implementation methods allow a tradeoff between the amount of hardware required and the signal-to-noise improvement obtained. In this report, the hardware requirement for various implementations of moving and fixed window moving target indicator is discussed and compared. The signal-to-noise improvement obtained by integration of moving target indicator outputs is calculated by analytical and simulation techniques for both configurations. It is demonstrated that the moving window moving target indicator produces correlation of noise samples where it is not present in fixed-window moving target indicator systems. It is shown that a square-law detector or a linear detector does not alter the relative performance of the moving and fixed window moving target indicator systems. A tabular result that compares hardware requirements (i.e., memories, adders, multiplexers, multipliers, multiplication speed) for the moving and fixed window moving target indicator is given.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1978
- Accession Number
- ADA054727
Entities
People
- Jerry D. Moore
- Neal B. Lawrence