Accession Number : AD0626592

Title :   CW DETECTION TECHNIQUES.

Descriptive Note : Technical memo.,

Corporate Author : ELECTRONIC DEFENSE LABS SYLVANIA ELECTRONIC SYSTEMS-WEST MOUNTAIN VIEW CALIF

Personal Author(s) : MEYER,Edward R. ; Bodine,Jean F.

Report Date : 19 NOV 1965

Pagination or Media Count : 59

Abstract : Three techniques were investigated as possible schemes for improving the detectability of a Continuous-Wave (CW) signal within a large Radio-Frequency (RF) bandwidth when a minimum of detection time is available. Each technique is compared to a conventional sweeping receiver. Two of the techniques employ post-detection integration as a means of obtaining sensitivity without imposing undue sweeping accuracy and stability that is required for predetection integration techniques. While post-detection integration is less efficient in terms of sensitivity-search rate capability, it is less complex to implement than predetection techniques. These techniques are based on the premise that by using basically less complex equipment operating in parallel channels, a system could be built that had comparable capability at a lower cost. It would also have greater reliability, even though a greater mass of equipment would be required. The other technique investigated employs a phase-coherent multiple-frequency local oscillator (LO), or picket fence, as a means of providing multiple-signal outputs that are summed coherently before detection, whereas noise outputs are summed incoherently as an attempt to improve signal detectability. (Author)

Descriptors :   (*CONTINUOUS WAVE RADAR, RADAR RECEIVERS), RADAR SIGNALS, BANDWIDTH, SEARCH RADAR, RADIOMETERS, DELAY LINES, OSCILLATORS, VIDEO AMPLIFIERS, CORRELATORS, CIRCUITS, NOISE(RADAR)

Subject Categories : Electrical and Electronic Equipment
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE