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

摘要

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.

主权项

1. A method for receiving control information in a wireless communication system, the method comprising:
receiving a first modulation sequence in a first orthogonal frequency division multiplexing (OFDM) symbol; receiving a second modulation sequence in a second OFDM symbol; and receiving a third modulation sequence in a third OFDM symbol, wherein the first modulation sequence is generated by modulating a signal field on a first binary phase shift keying (BPSK) constellation, wherein the second modulation sequence is generated by modulating a first Very High Throughput-Signal (VHT-SIG) field on the first BPSK constellation; wherein the third modulation sequence is generated by modulating a second VHT-SIG field on a second BPSK constellation, 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.