CONTINUOUS WAVE (CW) RADAR SYSTEM FOR PHASE-CODED TIME DELAYED TRANSMIT-RECEIVE LEAKAGE CANCELLATION

摘要

Disclosed is a method, system, and apparatus for transmitting a randomly phase-coded CW waveform in a manner that suppresses signal leakage and enables the recovery of polyphase subcodes advantageous for the purposes of correlation and pulse compression. The CW system transmits and receives a random waveform while concurrently providing properly delayed phase conversion parameters (ϕ_i−θ_i) from a corrections generator to various range gates. Each range gate processes any echo returns using a most recent phase conversion parameters (ϕ_k−θ_k) provided and correlation of the resulting echo subcodes ϕ_R produce either target indications or noise signals, depending on the most recent phase conversion parameters (ϕ_k−θ_k) provided to the range gate. The system may transmit the randomly phase-coded CW waveform while recovering any phase code {ϕ₁, ϕ₂, . . . ϕ_N} that lends itself to advantageous pulse compressions.