Resources Contact Us Home
Spread spectrum communications system

Image Number 5 for United States Patent #5303258.

A spread spectrum communications system includes: a transmitter having an input information a modulator for generating a spread spectrum signal in accordance with an input information signal together with a pseudonoise clock signal used to generate a first pseudonoise signal formed of a plurality of chips, a switch for switching on and off a locally generated carrier signal of said input information signal in accordance with the spread spectrum signal, a first means for inverting a phase of the spread spectrum signal when the value of the pseudonoise signal is equal to one, a second means for multiplying the inverted-phase spread spectrum signal by the carrier signal so as to produce a transmit signal at an output of the second means, and an output means for outputting the transmit signal from the second means so that the transmit signal is transmitted from the transmitter; and a receiver which receives the transmit signal from the transmitter, the receiver having a detector for obtaining a baseband signal from the transmit signal received at the detector, and a demodulation part for demodulating the baseband signal with a second pseudonoise signal which is generated synchronously with the transmit signal, so as to reproduce the input information signal.

  Recently Added Patents
Real ear measurement system using thin tube
Method for the treatment, alleviation of symptoms of, relieving, improving and preventing a cognitive disease, disorder or condition
Case for electronic device
Sampling filter device
Mobile communication device monitoring systems and methods
Method and/or apparatus for navigating mobile robot using virtual sensor
Method and system for coordinating client and host security modules
  Randomly Featured Patents
Method for the preparation of styrene polymer foam and foam prepared thereby
Self-regenerative process for contaminant removal from ammonia
Optical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lens
Method and apparatus for inspection of substrates
Method, system and memory controller utilizing adjustable read data delay settings
Bicycle helmet
Process for extruding and acid treating clay for improved color development in carbonless copy paper
Scarifier housing
Orthopaedic support
Treatment of water containing organic wastes with ammonium nitrate