APPARATUS AND METHOD FOR SCRAMBLING CONTROL FIELD INFORMATION FOR WIRELESS COMMUNICATIONS

摘要

In wireless communications, a high-efficiency (HE) physical layer protocol data unit (PPDU) includes an HE signal-B (SIG-B) field. In order to prevent undesirably large peak-to-average power ratio (PAPR) transmissions caused by repeated information in the HE SIG-B field, the HE SIG-B field may be scrambled. Scrambling of the HE SIG-B field may include scrambling of modulated data tones of each of one or more HE SIG-B field channels of the HE SIG-B field. This scrambling may include applying a phase rotation to the modulated data tones within each of the one or more HE SIG-B field channels. This scrambling (or phase rotation) is performed in addition to a phase rotation applied to each entire HE SIG-B field channel that is commonly referred to as a gamma rotation.

主权项

1. A wireless device for transmitting a frame, comprising:
one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause:
generating a high-efficiency (HE) physical layer protocol data unit (PPDU) including an HE signal B (HE-SIG-B) field, wherein the generating comprises:
generating coded HE-SIG-B bits,interleaving the coded HE-SIG-B bits to generate interleaved HE-SIG-B bits,modulating the interleaved HE-SIG-B bits to generate modulated symbols,generating phase-rotated symbols by applying a scrambling sequence to the modulated symbols, andtransforming the phase-rotated symbols to an orthogonal frequency-division multiplexing (OFDM) symbol of the HE-SIG-B field; andtransmitting the HE PPDU.