Packets with midambles having compressed OFDM symbols
First Claim
1. A method for wireless communication, the method comprising:
- generating, at a communication device, a physical layer (PHY) preamble of a PHY protocol data unit, wherein the PHY preamble is generated to include i) a first training field to be used by a receiver for synchronization, and ii) one or more second training fields to be used by the receiver for channel estimation and fine synchronization, wherein each of the second training fields includes a respective first orthogonal frequency division multiplexing (OFDM) symbol, and wherein generating the PHY preamble includes inserting a respective first guard interval (GI) corresponding to each first OFDM symbol of the one or more second training fields;
generating, at the communication device, i) a first portion of a PHY data payload of the PHY protocol unit, and ii) a second portion of the PHY data payload of the PHY protocol data unit, wherein the first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of second OFDM symbols, wherein each of multiple second OFDM symbols among the plurality of second OFDM symbols has a first duration; and
generating, at the communication device, a PHY midamble of the PHY protocol data unit, wherein;
the PHY midamble is to be transmitted subsequent to transmission of the first portion of the PHY data payload and prior to transmission of the second portion of the PHY data payload,the PHY midamble is generated to include one or more third training fields to be used by the receiver for channel estimation and fine synchronization,each of the third training fields includes a respective third OFDM symbol having a second duration shorter than the first duration, andgenerating the PHY midamble includes inserting a respective second GI corresponding to each third OFDM symbol, wherein a duration of each first GI is equal to a duration of each second GI.
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Abstract
A communication device generates: i) a physical layer (PHY) preamble of a PHY protocol data unit (PPDU), ii) a first portion of a PHY data payload of the PPDU, and iii) a second portion of the PHY data payload. The PHY preamble includes a first training field, and one or more second training fields. The first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of first orthogonal frequency division multiplexing (OFDM) symbols. Each of multiple first OFDM symbols has a first duration. The communication device generates a PHY midamble of the PPDU to be included between the first and second portions of the PHY data payload. The PHY midamble includes one or more third training fields, each including a respective second OFDM symbol having a second duration shorter than the first duration.
143 Citations
17 Claims
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1. A method for wireless communication, the method comprising:
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generating, at a communication device, a physical layer (PHY) preamble of a PHY protocol data unit, wherein the PHY preamble is generated to include i) a first training field to be used by a receiver for synchronization, and ii) one or more second training fields to be used by the receiver for channel estimation and fine synchronization, wherein each of the second training fields includes a respective first orthogonal frequency division multiplexing (OFDM) symbol, and wherein generating the PHY preamble includes inserting a respective first guard interval (GI) corresponding to each first OFDM symbol of the one or more second training fields; generating, at the communication device, i) a first portion of a PHY data payload of the PHY protocol unit, and ii) a second portion of the PHY data payload of the PHY protocol data unit, wherein the first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of second OFDM symbols, wherein each of multiple second OFDM symbols among the plurality of second OFDM symbols has a first duration; and generating, at the communication device, a PHY midamble of the PHY protocol data unit, wherein; the PHY midamble is to be transmitted subsequent to transmission of the first portion of the PHY data payload and prior to transmission of the second portion of the PHY data payload, the PHY midamble is generated to include one or more third training fields to be used by the receiver for channel estimation and fine synchronization, each of the third training fields includes a respective third OFDM symbol having a second duration shorter than the first duration, and generating the PHY midamble includes inserting a respective second GI corresponding to each third OFDM symbol, wherein a duration of each first GI is equal to a duration of each second GI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
a network interface device having one or more integrated circuit (IC) devices configured to; generate a physical layer (PHY) preamble of a PHY protocol data unit, wherein the PHY preamble is generated to include i) a first training field to be used by a receiver for synchronization, and ii) one or more second training fields to be used by the receiver for channel estimation and fine synchronization, wherein each of the second training fields includes a respective first orthogonal frequency division multiplexing (OFDM) symbol, and wherein generating the PHY preamble includes inserting a respective first guard interval (GI) corresponding to each first OFDM symbol of the one or more second training fields, generate i) a first portion of a PHY data payload of the PHY protocol unit, and ii) a second portion of the PHY data payload of the PHY protocol data unit, wherein the first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of second OFDM symbols, wherein each of multiple second OFDM symbols among the plurality of second OFDM symbols has a first duration, and generate a PHY midamble of the PHY protocol data unit, wherein; the PHY midamble is to be transmitted subsequent to transmission of the first portion of the PHY data payload and prior to transmission of the second portion of the PHY data payload, the PHY midamble is generated to include one or more third training fields to be used by the receiver for channel estimation and fine synchronization, each of the third training fields includes a respective third OFDM symbol having a second duration shorter than the first duration, and generating the PHY midamble includes inserting a respective second GI corresponding to each third OFDM symbol, wherein a duration of each first GI is equal to a duration of each second GI. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
Specification