OFDM packing and LDPC framing for constellation shaping in NG WLANs

US11637654B2 · kind B2 · utility

Assignee

• SNAP INC. · US

Inventors

• Yaron Yoffe · Ashdod, IL
• Assaf Gurevitz · Ramat HaSharon, IL
• Elad Meir · Ramat Gan, IL
• Shlomi Vituri · Tel Aviv-Yafo, IL
• Qinghua Li · Sunnyvale, US
• Xiaogang Chen · Beijing, CN
• Feng Jiang · Santa Clara, US

Key dates

• Filing date: Aug 20, 2020
• Grant date: Apr 25, 2023
• Expiry date: Oct 31, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/003
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

An apparatus for a station (STA) configured for operating in a next-generation (NG) wireless local area network (WLAN) comprises the processing circuitry configured to modify probabilities of constellation points to generate a more Gaussian distribution. In these embodiments, for LDPC framing and OFDM packing, the transmitter circuitry may be configured to compute a number of output bits (bout) to be transmitted based on a number of payload bits (bin) at an output of a shaping encoder, a shaping rate (rshaping), and an overhead percent (Boverhead). A shaping gain of up to 1.53 dB may be achieved. A new shaping encoder is provided to address the issue that the number of bits is not fixed.