Waveform design hopping system and method

Details Waveform design hopping system and method Waveform design hopping system and method

2009-03-18

2011-10-11

Ha, Dac (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S134000, C375S130000, C375S137000, C375S132000, C375S135000

Reexamination Certificate

active

08036255

ABSTRACT:
A method of transmitting a spread spectrum signal in a single communication session between a transmitter and a receiver, stores a series of N unique waveform designs and a hopping sequence in a transmitter memory. A signal is transmitted to a receiver according to the hopping sequence using the plurality of N unique waveform designs. Preferably, each waveform design is characterized by a unique composite spreading code that is formed by at least some of a plurality of constituent code segments. Alternatively or additionally, the waveform designs may differ by any one or more of code length, symbol or chip timing or phase, frame or burst structure, chip offset, modulation, error control coding, encryption scheme, or scrambling code. A transmitter and receiver are also disclosed, as is the concept of appending chips between symbols to expand the universe of unique spreading codes without incurring an increase in processing gain.

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