Telemetry-Scoring Receivers

Abstract

In order to provide high accuracy telemetry and miss distance data in the 2200-2290 MHz band, improved receiver sensitivity and exceptional frequency stability are required. The higher receiver sensitivity is required due to extended range requirements with an antenna as small as possible. The exceptionally high frequency stability arises from the fact that typical deviations in center frequency during an intercept is in the order of a few KHz out of 2250 MHz. If the frequency stability problem is not handled properly, this information can be distorted to the point of uselessness. Another problem area that arises as a by-product of stability is phase noise in the local oscillators that degrade the output SNR of a quieted receiver. The solutions to such problems are described in the following sections along with the compromises required for operation on board ship.