Null data packet sounding for preamble puncture techniques
Null Data Packet Sounding for preamble punctured Physical Layer Convergence Procedure Protocol Data Unit (PPDU) for efficient use of a wireless channel bandwidth where a primary service co-exists.
MEDIATEK SINGAPORE PTE. LTD.
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Jianhan James Chih-Shi Chao-Chun Yongho
Liu Yee Wang Seok