Abstract: The present invention comprises the digital implementation of a spread spectrum communications system including a spread spectrum modulator or transmitter and a spread spectrum receiver or demodulator. The demodulator, as modified with optional techniques, operates at zero I. Under these circumstances the receiver is susceptible to 1/F noise, as well as transient overloads. The addition of a high pass filter stage to only the receiver, in a communication system, without modifying the transmitter, will be recognized by those skilled in the art as violating the basic precepts of communications which attempt to tailor the characteristics of a receiver and transmitter to each other. However the applicant has found that demodulating RZ encoded data with an added high pass filter results in the production of Manchester data which is one of the forms of data encoding that can be handled by the demodulator.

Abstract: The present invention comprises a digital implementation of a spread spectrum communications system including a spread spectrum modulator or transmitter and a spread spectrum receiver or demodulator. The demodulator, as modified with optional techniques, operates at zero IF. Under these circumstances, the receiver is susceptible to 1/F noise, as well as transient overloads. The addition of a high pass filter stage to only the receiver, in a communications system, without modifying the transmitter, will be recognized by those skilled in the art as violating basic precepts of communications which attempt to tailor the characteristics of a receiver and transmitter to each other. However, applicant has found that demodulating RZ encoded data with an added high pass filter results in the production of Manchester data which is one of the forms of data encoding that can be handled by the demodulator.