Offset quadrature amplitude modulation filter bank multi-carrier signal detection method and device

Abstract

The embodiment of the invention discloses a multi-carrier signal detection method and device of an offset quadrature amplitude modulation filter bank. The multi-carrier signal detection method and device are applied to a data receiving terminal. The data receiving terminal intercepts a first signal in a baseband signal and filters the first signal to obtain a second signal; the second signal is averagely decomposed into a corresponding number of N point signals; fast Fourier transform is carried out on each N point signal to obtain the corresponding number of converted N point signals; each converted N point signal is descrambled according to a descrambling mode corresponding to a transmitting terminal scrambling mode, so as to obtain the corresponding number of descrambled N point signals; and the corresponding number of descrambled N point signals are superposed and then OQAM demodulation is carried out to obtain a real part or an imaginary part of the signal. According to the multi-carrier signal detection method and device of the offset quadrature amplitude modulation filter bank, each converted N point signal is descrambled according to the descrambling mode corresponding to the transmitting terminal scrambling mode, so that the receiving terminal can restore the real part or the imaginary part of the original signal.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for detecting multi-carrier signals of an offset quadrature amplitude modulation filter bank. Background technique [0002] Compared with the traditional multi-carrier technology, the filter bank multi-carrier technology (FBMC) has a stronger ability to resist multi-path interference, and can better handle the complex contradiction between high-speed wireless communication and complex balanced receiving technology. It is one of the core technologies of the next-generation broadband wireless communication system in the future. As a kind of implementation of FBMC system, Offset Quadrature Amplitude Modulation Filter Bank Multi-Carrier Technology (FBMC-OQAM) brings together many advantages of FBMC technology. This technology adopts the carrier orthogonal condition, which ensures that the received input signal can be completely restored at the data receiving end and is ...

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Problems solved by technology

like figure 2 As shown, the data sending end will multiply the intermediate signal after OQAM modulation by the preset phase interference factor, that is, add artificial scrambling; however, the existing FBMC-OQAM technology is still processed in the original way at the data receiving end, Alternately output the real or imaginary part of the recovered signal that is similar to the real or imaginary part of the original signal, but there is a difference between the real or imaginary part of the signal recovered by this method and the original signal, so the recovered Raw signal is not accurate

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