Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Ink composition, ink for inkjet recording and ink set using the ink
Portable multimedia player
3D solid-state arrangement for solid state memory
Automatic search system and method
High gradient lens for charged particle beam
Multicolored light converting LED with minimal absorption
Clip
  Randomly Featured Patents
Covered retracted confectionery
Ligand/binding partner bio-labeling systems
Electromagnetic clutch
Unsaturated carbohydrate derivatives polymers thereof and their use
Method and apparatus for vapor phase soldering
Peelable composite thermoplastic sealants in packaging films
Trench drain system and installation method
Information processing apparatus, control method therefor, and computer-readable memory
Adsorbent for air separation, production method thereof, and air-separation method using it
Load cell closed loop control for rotary ultrasonic bonding apparatus