Frequency hopping data radio

Details Frequency hopping data radio Frequency hopping data radio

2006-09-05

2006-09-05

Kim, Kevin (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

Reexamination Certificate

active

07103086

ABSTRACT:
Systems and methods that utilize a received signal to provide low cost, low power, high sensitivity radio frequency hopping communication. A transmitting system prepares a data packet that is to be communicated to a receiving system. The data packet includes a header, a network identification, and transmission data. A transmission frequency is identified and a phase lock loop (“PLL”) is set to the transmission frequency. The data packet is gathered, and frequency modulation and Differential Manchester encoding is performed. The signal is sent through a power amplifier and an antenna to a receiving system, which continually scans all channels of a frequency range for a valid signal. When a pulse is received, the signal is passed through a low noise amplifier, mixed down to 10.7 MHz, passed through one or more filters and one or more high gain amplifiers, mixed down to baseband, sent through a low pass filter, and then sent through a comparator. If an appropriate pulse width, expected bit pattern and a valid header are received, it is determined that the signal is valid and the entire data packet is demodulated to receive the transmitted data.

REFERENCES:
patent: 5506862 (1996-04-01), McIntosh
patent: 5802463 (1998-09-01), Zuckerman
patent: 6246713 (2001-06-01), Mattisson
patent: 6516039 (2003-02-01), Taura et al.
patent: 6597749 (2003-07-01), Bracmard
patent: 6643278 (2003-11-01), Panasik et al.

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