Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
AssigneeElectronics and Telecommunications Research Institute
InventorsIl-Gu Lee, Eun-Young Choi, Sok-Kyu Lee
Life of this patent
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Abstract
A method for automatically detecting a packet mode in a wireless communication system supporting a multiple transmission mode includes: acquiring at least one of data rate information, packet length information and channel bandwidth information from a transmitted frame; and determining the packet mode on the basis of the phase rotation check result of a symbol transmitted after a signal field signal and at least one of the data rate information, the packet length information and the channel bandwidth information acquired from the transmitted frame.
Claims8
A method of transmitting control information in a wireless communication system, comprising:
- generating a signal field, a first Very High Throughput-Signal (VHT-SIG) field, and a second VHT-SIG field;
- generating a first modulation sequence by modulating the signal field on a first binary phase shift keying (BPSK) constellation;
- generating a second modulation sequence by modulating the first VHT-SIG field on the first BPSK constellation;
- generating a third modulation sequence by modulating the second VHT-SIG field on a second BPSK constellation;
- transmitting the first modulation sequence in a first orthogonal frequency division multiplexing (OFDM) symbol;
- transmitting the second modulation sequence in a second OFDM symbol;
- and
- transmitting the third modulation sequence in a third OFDM symbol,
- wherein the second BSPK constellation is rotated by 90° counter-clockwise relative to the first BPSK constellation, and
- wherein the first OFDM symbol is contiguous with the second OFDM symbol and the second OFDM symbol is contiguous with the third OFDM symbol.
A device for transmitting control information in a wireless communication system, comprising:
- a processor;
- and
- a memory operatively coupled with the processor and storing instructions that when executed by the processor causes to the device to:
- generate a signal field, a first Very High Throughput-Signal (VHT-SIG) field, and a second VHT-SIG field;
- generate a first modulation sequence by modulating the signal field on a first binary phase shift keying (BPSK) constellation;
- generate a second modulation sequence by modulating the first VHT-SIG field on the first BPSK constellation;
- generate a third modulation sequence by modulating the second VHT-SIG field on a second BPSK constellation;
- transmit the first modulation sequence in a first orthogonal frequency division multiplexing (OFDM) symbol;
- transmit the second modulation sequence in a second OFDM symbol;
- and
- transmit the third modulation sequence in a third OFDM symbol,
- wherein the second BSPK constellation is rotated by 90° counter-clockwise relative to the first BPSK constellation, and
- wherein the first OFDM symbol is contiguous with the second OFDM symbol and the second OFDM symbol is contiguous with the third OFDM symbol.
Dependencies are inferred from the claim text.