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
Determining ill conditioning in square linear system of equations
Method of controlling semiconductor device, signal processing method, semiconductor device, and electronic apparatus
Encoder that optically detects positional information of a moving body from different optical paths lengths
Horse stationary tab
System and method for stranded file opens during disk compression utility requests
System, method and computer program product for sharing a single instance of a database stored using a tenant of a multi-tenant on-demand database system
Luggage wheel housing with wheel
  Randomly Featured Patents
Locking fastener
Method and system for using stored data items in native data formats in emulated e-mode programs
Seat belt retractor mounting system
Combined insulated beverage bottle and cups
Enhanced solubility pharmaceutical solutions
Method of polishing wafers
Vaporization cooled electrical apparatus
Process for lubricating synthetic fibers
Voice activated multiple microphone electroacoustic amplifier system
Car radio