Midamble for WLAN PHY frames
AssigneeMarvell International Ltd.
InventorsHongyuan Zhang, Rohit U. Nabar, Sudhir Srinivasa
Life of this patent
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Abstract
In a method for generating a single data unit for transmission via a communication channel, a preamble and a first portion of a data payload of the single data unit are generated. A midamble is generated, the midamble including at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol that includes calibration information. A second portion of the data payload of the single data unit is generated, and the midamble is included between the first portion of the data payload and the second portion of the data payload.
Claims34
A method for generating a single data unit for transmission via a communication channel, the method comprising:
- generating a preamble of the single data unit;
- generating a first portion of a data payload of the single data unit;
- generating a midamble, the midamble including a product of (i) one or more pilot matrices and (ii) a corresponding at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol, the at least one OFDM symbol including calibration information, wherein the one or more pilot matrices correspond to a maximum number of space-time streams of the communication channel;
- generating a second portion of the data payload of the single data unit;
- and
- including the midamble between the first portion of the data payload and the second portion of the data payload.
A method of receiving a single data unit via a communication channel, the method comprising:
- receiving a preamble of the single data unit;
- updating a first characteristic based on the preamble;
- receiving a first portion of a data payload of the single data unit;
- receiving a midamble of the single data unit, the midamble including a product of (i) one or more pilot matrices and (ii) a corresponding at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol, the at least one OFDM symbol including calibration information, wherein the one or more pilot matrices correspond to a maximum number of space-time streams of the communication channel;
- receiving a second portion of the data payload;
- and
- wherein the method further comprises at least one of 1) updating the first characteristic based on the midamble, or 2) updating a second characteristic based on the midamble.
A processor to generate data units for transmission via a plurality of antennas, the processor including a midamble generator and the processor configured to:
- generate a preamble of a single data unit;
- generate a first portion of a data payload of the single data unit;
- generate, via the midamble generator, a midamble of the single data unit, wherein the midamble includes a product of (i) one or more pilot matrices and (ii) a corresponding at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol, wherein the at least one OFDM symbol includes calibration information, and wherein the one or more pilot matrices correspond to a maximum number of space-time streams of a communication channel;
- generate a second portion of the data payload of the single data unit;
- and
- include the midamble between the first portion of the data payload and the second portion of the data payload.
A processor configured to:
- update a first characteristic based on a preamble of a single data unit received via a plurality of antennas;
- wherein the processor is configure to at least one of 1) update the first characteristic based on a midamble of the single data unit located between a first portion of a data payload of the single data unit and a second portion of the data payload, or 2) update a second characteristic based on the midamble;
- wherein the midamble includes a product of (i) one or more pilot matrices and (ii) a corresponding at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol, wherein the at least one OFDM symbol includes calibration information, and wherein the one or more pilot matrices correspond to a maximum number of space-time streams of a communication channel.
Dependencies are inferred from the claim text.