A spread spectrum receiver with filters matched to transmitter chip codes are implemented in digital circuits along with a digital circuit for acquisition and tracking of the arrival times of the chip codes. The digital circuit implementations are used for the noncoherent demodulation of pulse position...http://www.google.de/patents/US5166952?utm_source=gb-gplus-sharePatent US5166952 - Method and apparatus for the reception and demodulation of spread spectrum radio signals
