Adaptive, multi-rate waveform and frame structure for a...

Details Adaptive, multi-rate waveform and frame structure for a... Adaptive, multi-rate waveform and frame structure for a...

2006-02-14

2006-02-14

Pham, Brenda (Department: 2664)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S350000

Reexamination Certificate

active

06999446

ABSTRACT:
A method is disclosed for operating a wireless communications system, such as a DS-CDMA communications system, by transmitting a waveform that includes a plurality of repeating frames each having x header training base symbols in a header training symbol field (TH) and y tail training base symbols in a tail training symbol field (TT). The frame is received and functions as one of a plurality of different types of frames depending on the content of at least TT. In the preferred embodiment the frame functions as one of a normal traffic frame, a termination frame, or a legacy frame providing backwards compatibility with another waveform. A given one of the frames includes four equal-size data fields separated by three equal-sized control fields, the header training symbol field (TH) and the tail training symbol field (TT).

REFERENCES:
patent: 5966373 (1999-10-01), Stephenson et al.
patent: 6424689 (2002-07-01), Abe

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