Transmitting and receiving systems

Details Transmitting and receiving systems Transmitting and receiving systems

1987-11-16

1989-12-19

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

H04L 900

Patent

active

048887889

ABSTRACT:
Transmitter and receiver system comprises a transmitter comprising means for generating a pseudo noise code, a first mixer for modulating transmission data by the pseudo noise code, phase shifting means for shifting the phase of a reference frequency signal by 90.degree., a second mixer for frequency converting an output of the first mixer by one of the reference signal and the phase-shifted reference signal, a third mixer for frequency-converting the pseudo noise code by the other one of the two reference signals, and adding means for adding outputs of said second and third mixers. The system also comprises a receiver comprising means for shifting the phase of the transmitted signal by 90.degree., arithmetic operating means for multiplying the transmitted signal with the phase shifted signal means, and filter for allowing only the signal regarding the transmission data in an output of the arithmetic operating means to pass.

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Spread Spectrum System-R.C. Dixon, John Wiley & Sons Inc., 1976, pp. 206-215.

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