Peak to average power ratio (PAPR) reduction in a wireless network
US9686757B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2016 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Nov 9, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/383
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless device generates a High Efficiency (HE) Physical layer Protocol Data Units (PPDU) including a non-High Throughput Signal (L-SIG) field and transmits the HE PPDU. Transmitting the HE PDDU includes transmitting a set of extra tones with the L-SIG field. The set of extra tones include a sequence of values, and first, second, third, and fourth values of the sequence of values respectively correspond to BPSK constellation values of −1, −1, −1, and +1. The set of extra tones may include −28th, −27th, 27th, and 28th subcarriers, relative to a center (zero) subcarrier, of a 20 MHz bandwidth of the HE PPDU, and may be used to transmit the first, second, third, and fourth values of the sequence of values, respectively. Another wireless device may receive the HE PPDU, and may use the set of extra tones to estimate a channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.