Communication system for radar ground systems

A communications system comprising:

• transmitter means including a first clock;
• an oscillator having 0.degree. and 180.degree. outputs;
• a single-pole double-throw electronic switch connected to receive selectively said 0.degree. output or said 180.degree. output;
• first means connected from said switch pole to transmit a coded signal;
• a first data bank;
• a first sequence selector, said first clock being connected to said oscillator and to said first sequence selector, said first sequence selector being connected to shift said switch pole to produce a code in accordance with data in said first data bank;
• receiver means spaced from said transmitter means and including a second clock;
• means to produce an amplified signal when received;
• second means to produce delays of 1, 2, 3 . . . n bits of said amplified signal;
• first, second, third . . . nth phase detectors to receive inputs according to said 1, 2, 3 . . . n bits, respectively, each of said phase detectors having said amplified signal as a second input;
• first, second, third . . . nth NAND gates connected respectively from said first, second, third . . . nth phase detectors;
• a second sequence selector, said second clock being connected from said nth bit to a second input of each of said NAND gates and to said second sequence selector, each of said NAND gates having an output connected to said second sequence selector;
• and a second data bank connected from said second sequence selector to receive the output thereof.