Invention Grant
- Patent Title: Method and system for combining DFT-transformed OFDM and non-transformed OFDM
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Application No.: US16273302Application Date: 2019-02-12
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Publication No.: US10554464B2Publication Date: 2020-02-04
- Inventor: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04B7/005
- IPC: H04B7/005 ; H04L27/26 ; H04L1/00 ; H04L5/00

Abstract:
Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
Public/Granted literature
- US20190173701A1 Method and System for Combining DFT-Transformed OFDM and Non-Transformed OFDM Public/Granted day:2019-06-06
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