Patent ID: 9001637
Filing Date: 2015-04-07
Classification: H04L,H04W

Abstract:
1. 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.