AL-OFDM和SM-OFDM空频分组码信号盲识别方法

doi:10.3969/j.issn.1001-506X.2021.01.03

Abstract

Abstract:

To solve the problem of the space-frequency block codes with orthogonal frequency division multiplexing (SFBC-OFDM) blind signal recognition, a space-frequency block codes signal recognition method based on correlation function is proposed. Firstly, the correlation characteristic of transmit signal is obtained based on correlation among the different SFBC-OFDM elements. Then, the correlation characteristic of the receive signal is obtained based on the correlation among the transmit signals. Finally, the automatic signal recognition algorithm based on the peak test is proposed. The simulation result shows that the recognition probability of the proposed algorithm is 95% at a low signal to noise ratio (0 dB), and does not need channel coefficient, noise information and modulation types, and the correct identification probability is over 90% under the different modulation scheme, time offset and frequency offset. It can be applied in the engineer field such as cognitive radio systems, spectrum surveillance, and so on.

Key words: blind signal recognition, space-frequency block code (SFBC), correlation function, peak test, cognitive radio

CLC Number:

TN911.7

Qing LING, Wenjun YAN, Limin ZHANG, Keyuan YU. Blind signal recognition method of AL-OFDM and SM-OFDM space-frequency block codes[J]. Systems Engineering and Electronics, 2021, 43(1): 19-25.

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Blind signal recognition method of AL-OFDM and SM-OFDM space-frequency block codes

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References 19

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