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Use of iteration to improve the correction of AGC dependent channel-to-channel gain imbalance

  • US 5,241,316 A
  • Filed: 09/26/1991
  • Issued: 08/31/1993
  • Est. Priority Date: 09/26/1991
  • Status: Expired due to Term
First Claim
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1. In a radar guidance system for use in a missile, the radar guidance system having automatic gain control (AGC) circuitry that comprises a controller having a lookup table, and wherein the controller is coupled to controllable gain control amplifiers, a method of balancing the gains of Σ

  • +Δ and

    Σ



    channels of the radar guidance system when an imbalance occurs due to a change caused by the controllable gain control amplifiers, said method comprising the steps of;

    activating the missile and radar guidance system;

    measuring the gain imbalance at predetermined AGC points during radar guidance system calibration subsequent to activation of the missile and providing a set of correction factors indicative thereof;

    iterating the correction factors by applying the correction factors to the controllable amplifiers to determine a final set of correction factors that balances the Σ

    +Δ and

    Σ



    channels of the radar guidance system for each possible AGC value;

    storing the final set of correction factors in the lookup table;

    applying the final set of correction factors to the controllable amplifiers in response to changes in the AGC values to more accurately guide the missile.

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