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US 7,742,388 B2Granted
Packet generation systems and methods
OwnerDaniel Shearer, Mark A. Websterinventors
Life of this patent
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Abstract
Disclosed herein are various embodiments of methods, systems, and apparatus for increasing packet generation in a digital communication system. In one exemplary method embodiment, subcarriers are added to a packet in a wireless local area network transmission to increase the data rate.
Claims43
A method comprising:
- generating a packet with a size corresponding to a protocol used for a network transmission, wherein the packet comprises a preamble having a first training symbol and a second training symbol;
- increasing the size of the packet by adding subcarriers to the second training symbol of the packet to produce an extended packet, wherein a quantity of subcarriers of the second training symbol is greater than a quantity of subcarriers of the first training symbol;
- and
- transmitting the extended packet from an antenna.
1 more element
A method comprising:
- generating a first packet comprising a preamble portion and a data portion, wherein the preamble portion of the first packet comprises a first training symbol and a second training symbol, wherein the second training symbol comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and a wherein quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol;
- and
- transmitting the first packet from an antenna.
A method comprising:
- receiving a packet on a transmission channel, the packet comprising a preamble portion and a data portion, wherein the preamble portion of the packet comprises a first training symbol and a second training symbol, wherein the second training symbol comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and wherein a quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol;
- and
- determining a channel estimate for the transmission channel based on at least one of the first training symbol or the second training symbol.
A method comprising:
- receiving a composite packet on a transmission channel, the composite packet comprising a plurality of sub-packets on adjacent frequency channels, wherein each sub-packet comprises a preamble portion and a data portion, wherein the preamble portion comprises a first training symbol and a second training symbol, wherein the second training symbol comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and wherein a quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol;
- and,
- determining a channel estimate for the transmission channel based on the second training symbol of all of the plurality of sub-packets.
An apparatus comprising:
- a PHY unit configured to generate a first packet comprising a preamble portion and a data portion, wherein the preamble portion of the first packet comprises a first training symbol and a second training symbol, wherein the second training symbol comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and wherein a quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol;
- and
- an antenna configured to transmit the first packet.
An apparatus comprising:
- channel estimation circuitry configured to determine a channel estimate for a transmission channel based on a packet received on the transmission channel wherein the packet comprises a preamble portion and a data portion, wherein the preamble portion of the packet comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and a quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol, and wherein the channel estimate is based on at least one of the first training symbol or the second training symbol.
An apparatus comprising:
- means for determining a channel estimate for a transmission channel based on a composite packet received on the transmission channel, wherein the composite packet comprises a plurality of sub-packets on adjacent frequency channels, wherein each sub-packet comprises a preamble portion and a data portion, wherein a preamble portion comprises a first training symbol and a second training symbol, and the second training symbol comprises a plurality of modulated subcarriers, wherein the first training symbol comprises a plurality of modulated subcarriers, and a quantity of the modulated subcarriers of the second training symbol is greater than a quantity of the modulated subcarriers of the first training symbol, and wherein the channel estimate is based on the second training symbol of all of the plurality of sub-packets.
Dependencies are inferred from the claim text.