Method and Apparatus for Data Transfer Using a Time Division Multiple Frequency Scheme Supplemented with Polarity Modulation

• US 20080130685A1
• Filed: 01/22/2008
• Published: 06/05/2008
• Est. Priority Date: 09/26/2001
• Status: Active Grant

• Current Assignee: General Atomics, Inc.
• Original Assignee: General Atomics, Inc.
• Inventors: Walker, Michael L., Aiello, Roberto, Rogerson, Gerald D., Furuno, David S., Gehring, Stephan W.
• Granted Patent: US 8,149,879 B2
• Time in Patent Office: Days
• US Class Current: 370/478
• CPC Class Codes: H03K 2005/00026 controlled by an analog electrical signal, e.g. obtained after conversion by a D/A converter
• CPC Class Codes: H03K 2005/00058 controlled by a digital setting
• CPC Class Codes: H03K 2005/00097 Avoiding variations of delay using feedback, e.g. controlled by a PLL
• CPC Class Codes: H03K 2005/00267 using D/A or A/D converters
• CPC Class Codes: H03K 3/0315 Ring oscillators
• CPC Class Codes: H03K 5/133 using a chain of active delay devices
• CPC Class Codes: H03K 5/1508 using a plurality of delay lines
• CPC Class Codes: H03L 7/0997 Controlling the number of delay elements connected in series in the ring oscillator
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• CPC Class Codes: H04L 27/28 with simultaneous transmission of different frequencies each representing one code element
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26
• CPC Class Codes: H04L 5/26 combined with the use of different frequencies

Abstract

A method of data transmission according to one embodiment of the invention includes encoding a set of data values to produce a corresponding series of ordered n-tuples. The method also includes transmitting, according to the series of ordered n-tuples, a plurality of bursts over a plurality n of frequency bands. Specifically, for each of the plurality of bursts, a frequency band occupied by the burst is indicated by the order within its n-tuple of an element corresponding to the burst. A bandwidth of at least one of the plurality of bursts is at least two percent of the center frequency of the burst. Information is encoded into a polarity of at least one of the plurality of bursts.

Claims

1. A method of data transmission, said method comprising:

transmitting a plurality of bursts, each burst occupying one of a plurality of frequency bands;

wherein at least an order of transmission of the plurality of bursts in time and a polarity of at least one of the plurality of bursts encodes a symbol, the symbol corresponding to a plurality of data values; and

wherein a bandwidth of at least one of the plurality of bursts is at least two percent of the center frequency of the burst.