TAP II Processing System Final Report. Hardware Documentation
Abstract
The TAP II beamforming system is designed to process and display azimuth, frequency, and signal strength information from real-time data received by the Lambda towed array. The use of state-of-the-art hardware allows simultaneous spectral band coverage in all directions to the extend permitted by the towed array characteristics and the operator-selected control parameters. The three 64-element line arrays in the Lambda towed array system, having half- wave frequencies of 20, 60 and 320 Hz, allow excellent frequency and directional resolution within the design bandwidth. The hardware consists of an analog subsystem, a digital multiplexer with provision for high-density digital recording, a Hewlett Packard 21MX computer with peripherals, and a Floating Point Systems AP-120B Array Processor. The system is controlled by an interactive CRT keyboard display terminal and outputs to a hard copy unit attached to the display, to an IBM compatible magnetic tape transport, and to a line printer. Spectral analysis and beamforming are accomplished using digital signal processing techniques that take advantage of the high-speed Fast Fourier Transform and vector manipulation capabilities of the AP-120B Array Processor.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1977
- Accession Number
- ADC011790