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Subcarrier mapping techniques for guard interval-based orthogonal frequency division multiplexing communications

專利號(hào)
US11616671B1
公開日期
2023-03-28
申請(qǐng)人
QUALCOMM Incorporated（US CA San Diego）
發(fā)明人
Iyab Issam Sakhnini; Hemant Saggar; Tao Luo
IPC分類
H04L27/26; H04L5/00
技術(shù)領(lǐng)域
ofdm,matrix,gi,columns,may,symbol,manager,guard,or,samples
地域： CA CA San Diego

摘要

Methods, systems, and devices for wireless communications are described in which a user equipment (UE) or base station may generate orthogonal frequency division multiplexing (OFDM) symbols based on a permutation matrix (P) that permutes guard interval (GI) samples and data samples such that the OFDM symbols have power values across the symbols that are supportable by a transmitting device. The permutation matrix may map GI inputs to a subset of subcarriers for an OFDM communication, where the permutation matrix determined based at least in part on a first number of columns of a sub-matrix of a first matrix. The first matrix may be an inverse fast Fourier transform (IFFT) matrix, or may be a product of the IFFT matrix and a subcarrier mapping matrix. The first number of columns may correspond to a number of subcarriers that carry time-domain GI samples.

說(shuō)明書

FIG. 19 shows a flowchart illustrating a method 1900 that supports subcarrier mapping techniques for GI-based OFDM communications in accordance with aspects of the present disclosure. The operations of the method 1900 may be implemented by a base station or its components as described herein. For example, the operations of the method 1900 may be performed by a base station 105 as described with reference to FIGS. 1 through 8 and 13 through 16. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At 1905, the method may include determining configuration information for a first transmitter for OFDM communication, where the configuration information indicates that OFDM symbols within the OFDM communication include a first set of time-domain GI samples and a second set of time-domain data samples, and a permutation matrix is to be used to map a first set of GI inputs to a subset of a set of subcarriers for the OFDM communication. The operations of 1905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by a GI sequence manager 1525 as described with reference to FIG. 15.

權(quán)利要求

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