Formation method of reserved subcarrier position pattern for ngb‑w system

Abstract

The invention provides a method of forming position patterns of reserved subcarriers of an NGB-W (Next Generation Broadcasting-Wireless) system. Each physical frame in the NGB-W system comprises signaling symbols, data symbols and frame tail symbols, and each kind of symbols is provided with different pilots. The signaling symbols include signaling pilots. The data symbols include scattered pilots, edge pilots and continuous pilots. The frame tail symbols include edge pilots and frame tail pilots. The method comprises the following steps that the positions of the reserved subcarriers are selected from the non-pilot positions of the signaling symbols, the data symbols and the frame tail symbols, wherein positions of the scattered pilots and the continuous pilots, positions three subcarriers right to the continuous pilots, positions six subcarriers right to the continuous pilots, positions nine subcarriers right to the continuous pilots, positions of the edge pilots, and positions of 12 subcarriers on each left edge of the two sub bands of the NGB-W system are removed from the data symbols. According to the method, an effect of reducing PAPR (Peak to Average Power Ratio) can be well achieved by occupying 1% of subcarriers only.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to the technical field of communication methods for digital multimedia wireless broadcasting, and specifically relates to a reserved subcarrier position pattern for an NGB-W system using reserved subcarriers to reduce the peak-to-average power ratio of OFDM symbols method of formation. Background technique [0002] With the rapid development of world economy and culture, the demand of mobile users for information services is increasing rapidly. Relying solely on the traditional broadcasting network or the traditional two-way communication network, it is impossible to realize the optimal transmission of mobile information services. The next-generation radio and television network wireless (NGB-W) communication system can realize the fusion and coexistence of wireless broadcasting and two-way communication, and is an effective way to solve the contradiction betwe...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method for forming a reserved subcarrier position pattern of the NGB-W system, which is used to solve the problem of excessive peak-to-average power ratio of the time-domain signal in the existing NGB-W system. High problem, improve the power amplifier efficiency of the transmission

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