US 12,184,568 B2Granted

Pilot tones in distributed resource unit (DRU) transmission

AssigneeQUALCOMM Incorporated

InventorsLin Yang, Bin Tian, Youhan Kim, Qifan Chen

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Abstract

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.

Claims24

Dependent claims

A wireless communication device comprising:

at least one processor;
and
at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to:
modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical resource unit (RU) that is associated with a number (K) of pilot tones each having a respective location relative to the M tones;
map the M tones to M noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel, the M tones mapped to the M noncontiguous subcarrier indices representing a distributed resource unit (dRU), wherein the dRU is associated with a 26-tone dRU-based hierarchical structure;
and
transmit, over the wireless channel, the PPDU including a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices and different than the relative locations of the K pilot tones, the relative locations of the N pilot tones being associated with N subcarrier indices of the plurality of subcarrier indices and based at least in part on the 26-tone dRU-based hierarchical structure.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/513,461Filed 17 Nov 2023 · continuation
Priority: 30 Jul 2021
Published: US 2024/0163038 A116 May 2024
Granted: 31 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04L 5/0044
Arrangements for allocating sub-channels of the transmission path: allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal
H04L 5/0041
Inter-user or inter-terminal allocation: frequency-non-contiguous
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver

Family

Application17/390,828Parent of this continuation · filed 30 Jul 2021
US 2024/0163038 A1Pre-grant publication · published 16 May 2024
US 11,838,227 B2Parent of this continuation
US 2023/0048884 A1Published application
US 12,184,568 B2This patent

From the US filing history. Foreign family members aren’t listed.

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