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
Algorithm for color corrected analog dimming in multi-color LED system
Kit and method for the capture of tumor cells
Materials and methods for synthesis of a flavor and aroma volatile in plants
Wireless control system for a patient support apparatus
Signal phase-based location of network nodes
  Randomly Featured Patents
Color television camera using the green signal for vertical enhancement and the green and another signal for horizontal enhancement
Information distribution system, terminal apparatus used in such system, recording medium on which program is recorded, and loop connection avoidance method
Golf stroke training apparatus
Tamper-proof rivet assembly
Thermal transfer sheet
Heel protector
2-{-3,'2-(phenyl)-oxazol-4-ylmethoxyl-cyclohexyl methoxy}-propionic acid derivatives used as peroxisome proliferator-activated receptor (PPAR) ligands for the treatment of hyperlipidemia and d
Mounting assembly for computer floppy drive requiring no tool for removal from computer
Systems and methods of classifying sessions
Locking device