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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.

說明書

At 825, the UE 115-b may determine the permutation matrix (P). In some cases, the permutation matrix (P) may be determined based on a subset of columns identified in the sub-matrix of interest (Z), such as discussed with reference to FIGS. 5 through 7. At 830, the UE 115-b may generate the OFDM symbol based on the permutation matrix and the first matrix (e.g., based on FNfft?1BP). At 835, the UE 115-b and base station 105-b may communicate using GI-based OFDM communications, in which the OFDM symbols are generated based on a technique as discussed herein that provides a suitable transmit power across the OFDM symbol.

FIG. 9 shows a block diagram 900 of a device 905 that supports subcarrier mapping techniques for GI-based OFDM communications in accordance with aspects of the present disclosure. The device 905 may be an example of aspects of a UE 115 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communications manager 920. The device 905 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver 910 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to subcarrier mapping techniques for GI-based OFDM communications). Information may be passed on to other components of the device 905. The receiver 910 may utilize a single antenna or a set of multiple antennas.

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