Broadband asynchronous adjustable multi-carrier wireless transmission method and system supporting multi-antenna transmission

Abstract

The invention discloses a broadband asynchronous adjustable multi-carrier wireless transmission method supporting a multi-antenna transmission. The method comprises a signal transmission step and a signal receiving step. The invention also discloses a broadband asynchronous adjustable multi-carrier wireless transmission system supporting the multi-antenna transmission. The system comprises a transmission end and a receiving end, wherein the transmission end comprises a sub-band baseband transmission module, a multi-carrier synthesis module, a D / A module, a transmission radio-frequency module and a reflecting antenna; and the receiving end comprises a receiving antenna, a reception radio-frequency module, an A / D module, a multi-carrier analysis module and a sub-band baseband receiving module. Through adoption of the method and the system, spectrum allocation is performed flexibly under a larger bandwidth on the basis of keeping the advantages of OFDM (Orthogonal Frequency Division Multiplexing); asynchronous transmission is realized; the spectrum utilization ratio is increased; the peak-to-average ratio is lowered; frequency offsets are effectively resisted; carrier side lobes are reduced; and radio resources are saved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a wideband asynchronous adjustable multi-carrier wireless transmission method and system supporting multi-antenna transmission. Background technique [0002] In order to meet the needs of communication development, the next-generation wireless communication system must have higher spectrum utilization and energy efficiency on the basis of increasing data transmission speed, and its wireless coverage performance, transmission delay and user experience have been significantly improved. The system supports the communication requirements of different businesses, especially massive sensing devices and machine-to-machine (M2M) communication. The system also needs to have sufficient flexibility to integrate and dynamically allocate spectrum resources. [0003] Multi-antenna (MIMO) combined with multi-carrier parallel transmission technology is the key to the development of next-ge...

AI Technical Summary

Problems solved by technology

However, OFDM technology needs to insert a cyclic prefix (CP) to combat multipath fading, resulting in a waste of wireless resources; each subcarrier must be synchronized to ensure orthogonality, which limits the flexibility of spectrum use; it also has a high peak-to-average ratio , Sensitive to frequency offset, large carrier side lobe and other shortcomings

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