High-efficiency station (STA) and method for decoding an HE-PPDU

摘要

Embodiments of a system and methods for distinguishing high-efficiency Wi-Fi (HEW) packets from legacy packets are generally described herein. In some embodiments, an access point may select a value for the length field of a legacy signal field (L-SIG) that is non-divisible by three for communicating with HEW stations and may select a value for the length field that is divisible by three for communicating with legacy stations. In some embodiments, the access point may select a phase rotation for application to the BPSK modulation of at least one of the first and second symbols of a subsequent signal field to distinguish a high-throughput (HT) PPDU, a very-high throughput (VHT) PPDU and an HEW PPDU.

主权项

1. An apparatus of a station (STA), the apparatus comprising: memory;
and processing circuitry coupled to the memory, the processing circuitry configured to: process a legacy preamble of a high-efficiency (HE) packet protocol data unit (HE-PPDU), the legacy preamble comprising a legacy signal field (L-SIG) following legacy training fields, the L-SIG including at least a length field and a rate field; process a subsequent signal field following the L-SIG, wherein first and second orthogonal frequency division multiplexing (OFDM) symbols immediately following the L-SIG use binary phase-shift keying (BPSK) modulation; determine whether the length field is divisible by three; and decode one or more subsequent fields following the subsequent signal field of the (HE-PPDU) based on a determination that the length field is not divisible by three, the one or more subsequent fields including a high-efficiency signal field (HE-SIG-A).