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Dual sub-carrier modulation method and wireless station

A carrier modulation and wireless station technology, applied in the modulation carrier system, phase modulation carrier system, digital transmission system, etc., can solve narrowband interference and other problems, and achieve the effect of solving narrowband interference

Active Publication Date: 2018-08-31
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to provide a low peak-to-average power ratio dual subcarrier modulation method and a wireless station, which can solve the problem of narrowband interference

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  • Dual sub-carrier modulation method and wireless station
  • Dual sub-carrier modulation method and wireless station
  • Dual sub-carrier modulation method and wireless station

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Embodiment Construction

[0022] Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0023] figure 1 It is a wireless communication system 100 supporting DCM (dual carrier modulation, dual carrier modulation) transmission with reduced PAPR (peak-to-average power ratio, peak-to-average power ratio) and a high-efficiency HE PPDU frame structure according to one aspect. The wireless communication network 100 includes a wireless access point AP101 and a wireless station STA102. In a wireless communication system, wireless devices communicate with each other through various well-defined frame structures. A frame includes a physical layer convergence procedure (Physical Layer Convergence Procedure, PLCP) protocol data unit (PPDU), a frame header and a payload. Frames are in turn divided into very specific and standard parts. exist figure 1 , a high efficiency (HE) PPDU frame 110 is transmitted from the AP 101 to the ...

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Abstract

The invention discloses a dual sub-carrier modulation method and a wireless station. Dual sub-carrier modulation (DCM) is introduced in high efficiency (HE) WLAN. DCM is a solution to deal with narrowband interferences and for range extension. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. If DCM is applied,then the transmitter modulates the same encoded bits onto two separated subcarriers with the same or different constellation mapping schemes. DCM suffers from a high peak-to-average power ratio (PAPR). In accordance with one novel aspect, a method of transmitting and encoding a HE PPDU frame with binary phase shift keying (BPSK) DCM and lower PAPR is proposed. With the abovementioned mode, the invention can expand the range of the outdoor scene and solve the problem of narrow-band interference.

Description

technical field [0001] The present invention relates to the field of wireless network communication, in particular to the reduction of dual subcarrier modulation (dual subcarrier modulation, DCM) and peak-to-average power ratio (peak-to-average power ratio, PAPR) in wireless communication systems. Background technique [0002] IEEE 802.11 is a set of media access control (media access control, MAC) and physical layer (physical layer, PHY) specification. The 802.11 family includes a series of half-duplex transmission wireless modulation techniques using the same basic protocol. Standards and amendments provide the basis for wireless networking products using the Wi-Fi frequency band. For example, IEEE 802.11ac is a wireless networking standard in the IEEE 802.11 series, which provides high-throughput WLANs on the 5G frequency band. Significantly wider channel bandwidths (20MHz, 40MHz, 80MHz and 160MHz) are proposed in the IEEE 802.11ac standard. The High Efficiency WLAN s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/20
CPCH04L27/20H04L27/2615
Inventor 盖瑞安威尔刘剑函伍天宇皮尔二世汤姆士艾德华
Owner MEDIATEK INC
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