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

專利號
US11616671B1
公開日期
2023-03-28
申請人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Iyab Issam Sakhnini; Hemant Saggar; Tao Luo
IPC分類
H04L27/26; H04L5/00
技術領域
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.

說明書

The UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

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