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Joint sidelobe suppression method and device based on bipolar coding and windowing

A sidelobe suppression and bipolar technology, applied in the field of communication, to achieve the effect of improving parallel processing capability, reducing cost and power consumption, and improving bit error performance

Inactive Publication Date: 2015-05-20
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a joint sidelobe suppression method and device based on bipolar coding and windowing, which can improve sidelobe suppression performance without increasing computational complexity and without introducing interference, thereby Minimize the interference of cognitive users to primary users

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  • Joint sidelobe suppression method and device based on bipolar coding and windowing
  • Joint sidelobe suppression method and device based on bipolar coding and windowing
  • Joint sidelobe suppression method and device based on bipolar coding and windowing

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Embodiment Construction

[0034] The power spectrum function of an OFDM symbol can be calculated by:

[0035] S x ( f ) = Σ i = 0 N - 1 | X i ( f ) | 2 T S - - - ( 1 )

[0036] In the formula, i represents the ith subcarrier of an OFDM symbol, T S is the duration of one OFDM symbol, N is the number of subcarriers of one OFDM symbol, and f is the frequency range occupied by one OFDM symbol. x i (f) is the spectrum function of the i-...

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Abstract

The invention discloses a joint sidelobe suppression method and a joint sidelobe suppression device based on bipolar coding and windowing. Baseband data generated by a digital information source module are coded by a channel of a channel coding module; after being subjected to serial-to-parallel conversion of a modulation mapping and serial-to-parallel conversion module of a modulation mapping module, the baseband data are sent into a bipolar coding module; the bipolar coding module carries out bipolar coding on parallel data in sequence and then sends the parallel data into an IFFT transformation module for IFFT transformation; the data subjected to the IFFT transformation are sent into a parallel-to-serial conversion module for parallel-to-serial conversion after passing through a raised cosine window of a windowing module and are then sent into a radio frequency module to form a final OFDM modulation signal. According to the method, the sidelobe suppression performance can be improved under the conditions that the calculation complexity is not increased and interference is not introduced, so that the interference of a cognitive user on a main user is suppressed to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a joint sidelobe suppression method and device based on bipolar coding and windowing. Background technique [0002] With the continuous growth of wireless services, spectrum resources have become increasingly tight. Therefore, in future communication technologies, how to improve spectrum utilization has become one of the main problems to be solved. In order to maximize spectrum utilization as much as possible, domestic and foreign scholars have proposed cognitive radio technology. Cognitive radio technology requires that cognitive users can use frequency bands (idle frequency bands) not used by primary users to communicate, and control the interference of cognitive users to primary users within a tolerable range. OFDM technology is widely used in wireless communication systems, it has high spectrum utilization, and parameters such as subcarrier modulation mod...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2602
Inventor 肖海林胡静许旻任婵婵贺栋梁侯嘉
Owner GUILIN UNIV OF ELECTRONIC TECH
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