Accession Number:

ADA370583

Title:

Detection Performance of Or-ing Device with Pre- and Post-Averaging: Part I - Random Signal

Descriptive Note:

Final technical rept.

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI

Personal Author(s):

• Nuttall, Albert H.

Report Date:

1999-07-26

Pagination or Media Count:

162.0

Abstract:

The detection performance of an or-ing device with pre-averaging and post-averaging has been determined in the form of numerous receiver operating characteristics covering a wide range of input signal-to-noise ratios. Numerical evaluation of the false alarm probability Psub f and detection probability Psub d has been conducted for the case of a random Gaussian signal in the presence of additive Gaussian noise, for a wide range of values of K, the amount of pre-averaging before or-ing N, the number of channels or-ed and M, the amount of post-averaging after or-ing. Also, a MATLAB program is listed that can be used to extend these results to parameter values outside the range studied here. The tradeoffs associated with switching from post-averaging to pre-averaging, or vice-versa, have been thoroughly investigated and tabulated for a standard operating point Psub f 1 E-3, Psub d 0.5, and for a high-quality operating point Psub f 1 E-6, Psub d 0.9. The losses associated with doing too little pre-averaging can be severe, especially for large numbers, N, of or-ed channels.

Descriptors:

• *SIGNAL PROCESSING
• *SIGNAL TO NOISE RATIO
• DATA MANAGEMENT
• PERFORMANCE(ENGINEERING)
• RANDOM VARIABLES
• GAUSSIAN NOISE
• PROBABILITY DENSITY FUNCTIONS
• NONLINEAR SYSTEMS
• SYSTEMS ANALYSIS
• TRADE OFF ANALYSIS

Subject Categories:

• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE