US 10,834,674 B1Granted

Training sequences for high efficiency wireless local area networks

AssigneeMarvell Asia Pte Ltd

InventorsRui Cao, Yakun Sun, Hongyuan Zhang

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method for communicating in a high efficiency WLAN includes determining that a transmission mode of a transmitting device for transmitting a long training field (LTF) sequence is an orthogonal frequency division multiple access (OFDMA) mode. In response to the determination that the transmission mode is the OFDMA mode, the method determines a target resource unit (RU) sequence for a smallest RU for the OFDMA mode, selects, from a plurality of candidate training sequences and in accordance with a desired peak-to-average power ratio (PAPR) value, a target training sequence for the LTF sequence, and masks the target training sequence by muting specified tones of the target training sequence. The masked target training sequence is assigned to the transmitting device to be transmitted in the LTF and the LTF including the masked target training sequence is transmitted.

Claims18

Dependent claims

A method for communicating in a high efficiency (HE) wireless local area network (WLAN), the method comprising:

determining that a transmission mode of a transmitting device for transmitting a long training field (LTF) sequence is an orthogonal frequency division multiple access (OFDMA) mode;
in response to the determination that the transmission mode is the OFDMA mode, performing each of
(i) determining a target resource unit (RU) sequence for a smallest RU for the OFDMA mode,
(ii) selecting, from a plurality of candidate training sequences and in accordance with a desired peak-to-average power ratio (PAPR) value, a target training sequence for the LTF sequence, wherein the plurality of candidate training sequences is based at least in part on the target RU sequence, wherein each of the candidate training sequences includes a first number of base sequences and a second number of floating sequences, and wherein the first number of base sequences and the second number of floating sequences are determined based on a transmission bandwidth and a tone spacing, and
(iii) masking the target training sequence by muting specified tones of the target training sequence, wherein muting the specified tones includes transmitting null tones in locations of the specified tones;
assigning the masked target training sequence to the transmitting device to be transmitted in the LTF;
and
transmitting the LTF including the masked target training sequence.

5 more elements

A device configured for communicating in a high efficiency (HE) wireless local area network (WLAN), the device comprising:

a processing device configured to
determine that a transmission mode of a transmitting device for transmitting a long training field (LTF) sequence is an orthogonal frequency division multiple access (OFDMA) mode,
in response to the determination that the transmission mode is the OFDMA mode,
(i) determine a target resource unit (RU) sequence for a smallest RU for the OFDMA mode,
(ii) select, from a plurality of candidate training sequences and in accordance with a desired peak-to-average power ratio (PAPR) value, a target training sequence for the LTF sequence, wherein the plurality of candidate training sequences is based at least in part on the target RU sequence, wherein each of the candidate training sequences includes a first number of base sequences and a second number of floating sequences, and wherein the first number of base sequences and the second number of floating sequences are determined based on a transmission bandwidth and a tone spacing, and
(iii) mask the target training sequence by muting specified tones of the target training sequence, wherein muting the specified tones includes transmitting null tones in locations of the specified tones and
assign the masked target training sequence to the transmitting device to be transmitted in the LTF;
and
a transmitter to transmit the LTF including the masked target training sequence.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/221,755Filed 17 Dec 2018 · continuation
Priority: 28 Jul 2015
Granted: 10 Nov 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04W 52/0229
Using monitoring of external events, e.g. the presence of a signal: where the received signal is a wanted signal
H04L 5/0007
Time-frequency: the frequencies being orthogonal, e.g. OFDM or DMT
H04L 27/26025
Signal structure: numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
H04L 27/2613
Details of reference signals: structure of the reference signals

Family

Application62/197,856Us provisional application · filed 28 Jul 2015
Application62/240,241Us provisional application · filed 21 Oct 2015
Application15/221,438Parent of this continuation · filed 27 Jul 2016
US 10,159,043 B1Parent of this continuation · filed 18 Dec 2018
US 10,834,674 B1This patent

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