| Patent Number |
Title Of Patent |
Date Issued |
| 4964138 |
Differential correlator for spread spectrum communication system |
October 16, 1990 |
| A spread spectrum communications system includes an encoder for differentially encoding a spread spectrum spreading code sequence in accordance with an input data signal. Each chip of the spreading code sequence is inverted, or not inverted, relative to the polarity of a correspondin |
| 4942591 |
Multiple phase PSK demodulator |
July 17, 1990 |
| A multiple phase PSK demodulator for use in a spread spectrum communication system includes a plurality of baseband frequency converters coupled to a corresponding plurality of differential decoders in order to directly recover the encoded PSK data. The logic outputs of the plurality of |
| 4930140 |
Code division multiplex system using selectable length spreading code sequences |
May 29, 1990 |
| A code division multiplex system for use in a spread spectrum communication system utilizes selectable length spread spectrum spreading code sequences. At the encoder, one of a pluraluty of a spread spectrum spreading code sequences having a given fixed length is selected for differe |
