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Sidelobe suppression method for OFDM communication signal

A technology for side lobe suppression and communication signal, which is applied in the field of side lobe suppression of OFDM communication signals, can solve the problems of large loss of signal-to-noise ratio, increase of loss of signal-to-noise ratio, etc. Efficient effect

Pending Publication Date: 2021-11-02
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

[0006] Based on the above problems, the present disclosure provides a sidelobe suppression method for OFDM communication signals to alleviate the large loss of signal-to-noise ratio when performing mismatch filtering for OFDM signals in the prior art, and the loss of signal-to-noise ratio increases with the increase of the observation window technical problems such as increasing

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  • Sidelobe suppression method for OFDM communication signal
  • Sidelobe suppression method for OFDM communication signal
  • Sidelobe suppression method for OFDM communication signal

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[0035]The present disclosure provides a sidelobe suppression method for OFDM communication signals, and an OFDM signal distance sidelobe suppression technology that integrates mismatch processing and LMS (Least Mean Square, least mean square) filtering. For OFDM communication signals, the method of sidelobe suppression combined with mismatch processing and LMS filtering controls the energy distribution of pulse pressure side lobes through mismatch processing, so that the side lobes in the detection range on the left side of the peak value are 0, and combined with LMS filtering to reduce the peak value The sidelobe on the right side expands the range of no sidelobe on the right side of the peak, which can break through the constraints of traditional single mismatch processing, thereby reducing the loss of signal-to-noise ratio without reducing the observation range.

[0036] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the p...

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Abstract

The invention provides a sidelobe suppression method for an OFDM communication signal. The sidelobe suppression method comprises the following steps of: S1, determining an OFDM signal parameter and generating a radar communication integrated transmitting signal according to the OFDM signal parameter; S2, performing mismatch processing on the transmitting signal to generate a receiving end reference signal, and performing linear convolution on the transmitting signal and the receiving end reference signal to generate a point spread function; S3, performing linear convolution on an echo signal obtained after the integrated transmitting signal is reflected by a space target and the receiving end reference signal to generate a pulse compression signal; S4, taking the pulse compression signal and the point spread function as an input signal and a reference signal of an LMS filter respectively, and then completing sidelobe suppression through the LMS filter.

Description

technical field [0001] The present disclosure relates to the technical field of radar, and in particular to a sidelobe suppression method for OFDM communication signals. Background technique [0002] With the continuous development of electronics and information technology, the differences between radar perception and wireless communication in terms of sending and receiving channels, signal and data processing, management and control are gradually narrowing, showing a trend of integration. No matter in the traditional military application field or in the emerging civilian field, people hope to build a multi-functional integrated electronic system to realize information fusion and resource sharing between different functions, and to solve the problem of large size, serious electromagnetic interference and spectrum resources in the coordination of multiple single systems. Intense competition and many other issues. At present, some countries have developed radar communication ...

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Application Information

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IPC IPC(8): G01S7/28H04L27/26
CPCG01S7/2813H04L27/26265
Inventor 梁兴东李焱磊张霄霄
Owner AEROSPACE INFORMATION RES INST CAS
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