An efficient RF tracking technique with spread spectrum signal at sensitivity level

Abstract

A compact and novel circuit is presented for quickly tracking the moving target to provide uninterrupted communication between ground station and moving target. The key feature of the proposed circuit is the mono-pulse tracking technique of ground antenna with spread spectrum signal at sensitivity level. The circuit insures the sensitivity of tracking chain is better than the telemetry (Data) chain so that the ground tracking antenna will acquire quickly the moving target. The proposed topologies work well for Spread Spectrum transmitted signal (SS) and provide sufficient anti-jam margin in tracking chain also. The same circuit is also very useful when transmitted signal uses code division multiple access (CDMA) technique. In such techniques signal from one transmitter appear as a strong interferer for other transmitter. Propose topology insure that transmitted signal from our own other moving platform will not confuse the ground tracking antenna and break the communication link. In this way efficient frequency spectrum utilization is possible even for the links between moving platform and stationary ground stations. The proposed scheme is having potential for integration with the entire conventional tracking scheme such as monopulse, conical scanning and electronic scanning. It is an added advantages moving towards advance spread spectrum microwave unified telemetry tracking and control systems (MUTTCS).