Noise-resistance framing modulation method for mobile multi-media broadcast signals of single frequency network
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 蔡春艳
- Publication Date
- 2013-10-30
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention belongs to the field of mobile communication, and more specifically relates to a single-frequency network anti-noise mobile multimedia broadcasting signal framing modulation method. Background technique
[0002] Because OFDM multi-carrier transmission technology has many advantages such as simple structure, high spectrum utilization rate, and resistance to frequency selectivity and channel time variation, it has attracted much attention and has been deeply researched and applied in Xdsl, broadband mobile communication, broadband mobile local area network, It is widely used in many fields such as digital TV, mobile multimedia broadcasting, etc. The high peak-to-average power ratio (PAPR) of OFDM signals has high requirements on the linear range of amplifiers and digital-to-analog converters. If the linear range of the system cannot meet the signal changes, it will cause signal distortion and signal spectrum changes. , resulting in the des...