Signal modulation and demodulation method and device for joint subcarrier activation and modulation selection
A subcarrier modulation and subcarrier technology, applied in the field of demodulation, joint subcarrier activation and modulation selection signal modulation, can solve the problem that the spectrum efficiency and power efficiency cannot meet the communication requirements
Active Publication Date: 2020-12-04
BEIJING UNIV OF POSTS & TELECOMM
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However, the spectral efficiency and power efficiency of traditional OFDM can no longer meet the current communication needs
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[0114] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0115] In order to solve the technical problem of low spectral efficiency and power efficiency in traditional OFDM communication systems, embodiments of the present invention provide a signal modulation and demodulation method and device, electronic equipment and computer-readable method for joint subcarrier activation and modulation selection. storage medium.
[0116] The signal modulation method of joint subcarrier activation and modulation selection provide...
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The embodiment of the invention provides a signal modulation and demodulation method and device combining subcarrier activation and modulation selection. The method comprises the following steps: acquiring a bit to be transmitted; dividing the bits to be transmitted into a first type of bits, a second type of bits and a third type of bits; encoding the first type of bits to obtain subcarrier stateindex bits; encoding the second type of bits to obtain subcarrier modulation index bits; determining an activation state of each subcarrier according to the subcarrier state index bit; based on the subcarrier modulation index bit, determining a modulation mode of the subcarrier of which the activation state is an activated state; and performing orthogonal frequency division multiplexing (OFDM) modulation on the third type of bits based on the determined modulation mode and the determined activation state of each subcarrier to obtain a modulation signal. The first type of bits and the second type of bits do not need to be transmitted, and the receiving end can further demodulate the first type of bits and the second type of bits according to the demodulated activation state of the subcarrier and the modulation mode. Improving spectral efficiency.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a signal modulation and demodulation method and device for joint subcarrier activation and modulation selection. Background technique [0002] In the traditional OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, each subcarrier carries symbol information based on a specific modulation method, such as multi-level phase shift keying, multi-level orthogonal amplitude modulation, etc. The modulation scheme modulates bit information into subcarriers. However, the spectral efficiency and power efficiency of traditional OFDM can no longer meet the current communication needs. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a signal modulation and demodulation method and device for joint subcarrier activation and modulation selection, so as to improve...
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IPC IPC(8): H04L27/26H04L27/00H04L1/00
CPCH04L1/0054H04L27/0008H04L27/2627H04L27/2628H04L27/2647H04L27/2697
Inventor 郭文彬赵磊王文博刘瑞芳
Owner BEIJING UNIV OF POSTS & TELECOMM