Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-09-11
2007-09-11
Nguyen, Tony T. (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S414400, C455S509000, C455S511000, C370S431000, C370S901000, C370S908000
Reexamination Certificate
active
10778751
ABSTRACT:
A frame format for high data throughput wireless local area network transmissions includes a first preamble segment, a second preamble segment, and a variable length data segment. The first preamble segment includes a first training sequence, a second training sequence, and a high throughput channel indication, wherein the first training sequence is within a first set of subcarriers of a channel and the second training sequence is within a second set of subcarriers of the channel, wherein the first set of subcarriers is a subset of the second set of subcarriers. The second preamble segment includes a third training sequence within a third set of subcarriers of the channel, wherein the second set of subcarriers is a subset of the third set of subcarriers. The variable length data segment utilizes the third set of subcarriers to convey data.
REFERENCES:
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Takeshi Onizawa, Masato Mizoguchi, Masahiro Morikura and Toshiaki Tanaka, “A Fast Synchronization Scheme of OFDM Signals for High-Rate Wireless LAN,” IEICE Trans. Commun., vol. E82-B. No. 2, Feb. 199, pp. 455-463.
Erik G. Larsson and Jia Li, “Preamble Design for Multiple-Antenna OFDM-Based WLANs With Null Subcarriers,” IEEE Signal Processing Letters, vol. 8, No. 11, Nov. 2001, pp. 285-288.
XP-002298432, 802.11gTM, IEEE Standard for Information Technology, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Amendment 4: Further Data Rate Extension in the 2.4 GHz Band, IEEE Computer Society, Jun. 2003, pp. 1-78.
Hansen Christopher J.
Moorti Tushar
Trachewsky Jason A.
Broadcom Corporation
Garlick & Harrison & Markison
Markison Timothy W.
Nguyen Thuan T.
Nguyen Tony T.
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