초록 ▼

A transceiver for transmitting and receiving digital data is disclosed. The transceiver employs direct sequence spread spectrum communications techniques for reducing interference among multiple users in a communications network environment. Each transceiver has a transmitter for locking a digital b

A transceiver for transmitting and receiving digital data is disclosed. The transceiver employs direct sequence spread spectrum communications techniques for reducing interference among multiple users in a communications network environment. Each transceiver has a transmitter for locking a digital bit stream to a predetermined spread spectrum chip sequence and carrier signal. Frequency of the carrier signal and the chip sequence. Both the carrier signal, the chip sequence and the bit stream rate are derived from an integrally related to an accurate reference frequency to facilitate rapid acquisition and decoding of the signal by another transceiver. To provide for multiple communications channels on a single transmission medium, means for producing selectable carrier frequencies and/or selectable spreading sequences are included. The transceiver also has a receiver portion for acquiring and decoding a transmitted and direct sequence spread spectrum signal to recover the digital bit stream using the spread spectrum chip sequence and carrier signal.

대표청구항 ▼

An integrated circuit for transmitting and receiving digital information across various communications media comprising: a frequency means for generating a reference frequency; transmitter means for locking a digital bit stream, a carrier signal and a pseudonoise chip sequence to produce a direct se

An integrated circuit for transmitting and receiving digital information across various communications media comprising: a frequency means for generating a reference frequency; transmitter means for locking a digital bit stream, a carrier signal and a pseudonoise chip sequence to produce a direct sequence spread spectrum signal for transmission to another integrated circuit; said transmitter means including a circuit means for modifying said pseudonoise chip sequence to provide selectable carrier frequencies for multiple communications channels on a single transmission medium; receiver means for acquiring and decoding a previously transmitted direct sequence spread spectrum signal using a local carrier signal and a local pseudonoise chip sequence to recover said digital bit stream; wherein said carrier signal and said pseudonoise chip sequence are substantially identical to said local carrier signal and said local pseudonoise chip sequence, respectively, and each are derived from, and integral multiples of, said reference frequency.