synchronous reference signal sending and frequency offset estimation of UFMC waveforms

A technology of reference signal and transmission method, applied in the direction of multi-frequency code system, etc., can solve the problems of difficult application and high implementation complexity, and achieve the effect of reducing computational complexity and ensuring estimation performance

Active Publication Date: 2019-05-24
SOUTHEAST UNIV
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Problems solved by technology

However, its implementation complexity is too high to be applied to practical systems

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  • synchronous reference signal sending and frequency offset estimation of UFMC waveforms
  • synchronous reference signal sending and frequency offset estimation of UFMC waveforms
  • synchronous reference signal sending and frequency offset estimation of UFMC waveforms

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Embodiment Construction

[0035] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0036] The signal structure and existing estimation methods of the UFMC system are as follows:

[0037] Step 1, the system configures subbands.

[0038] Suppose a UFMC system contains N subcarriers in the frequency domain, the bandwidth of each subcarrier is Δf, and the total bandwidth is B=NΔf. These sub-carriers are divided into M sub-bands (Sub-band) according to the system configuration, and the m-th sub-band is assigned by N m adjacent subcarriers. Use U=[0,1,...,N-1] to represent the set of subcarrier positions, then Indicates the subcarrier position contained in the mth subband, and N 0 +N 1 +… N M-1 =N. According to system settings, the M subbands...

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Abstract

The invention provides a synchronous reference signal sending and frequency offset estimation method suitable for UFMC waveforms. A synchronous reference signal with a cyclic structure is designed tobe sent, integer frequency offset can be estimated at a receiving end through a simple correlation method, the calculation complexity is greatly reduced, and meanwhile it is guaranteed that the estimation performance is not changed. The method is suitable for the UFMC waveform technology which can be adopted in the next generation of communication system, and is also suitable for other multi-carrier systems, such as a filter bank multi-carrier (FBMC), generalized frequency division multiplexing (GDMC) and the like. The frequency offset estimation method provided by the invention can also be applied to the new waveform technologies with filters. In addition, the method is also suitable for traditional waveforms, such as OFDM and the like.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and provides a synchronization reference signal transmission and frequency offset estimation method suitable for universal filter multi-carrier (UFMC) waveforms. Background technique [0002] In mobile communication systems, waveforms have always been one of the main concerns in air interface technology. The current commercial fourth-generation mobile communication system (4G) adopts cyclic prefix-based orthogonal frequency division multiple access (CP-OFDM) technology as its air transmission waveform. The CP-OFDM technology has the advantages of high transmission efficiency, simple implementation, and easy combination with multiple-input multiple-output (MIMO). However, since CP-OFDM uses rectangular window truncation in the time domain processing, there is a high out-of-band leakage, which is even more unfavorable for supporting asynchronous transmission of adjacent sub-bands. Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 盛彬张辉顾佳雯张佳丽
Owner SOUTHEAST UNIV
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