FBMC-OQAM timing and channel estimation training sequence design method

A technique of training sequence and channel estimation, which is applied in the field of FBMC-OQAM timing and channel estimation training sequence design, and can solve problems such as difficulty in channel coefficient estimation

Active Publication Date: 2019-09-06
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0004] Based on the above characteristics of the FBMC-OQAM system, due to the introduction of a filter with good TFL characteristics, while bringing excellent OOB radiation performance, it also makes multiple FBMC symbols partially overlap in the time domain, which makes the synchronization of the FBMC system Sequence design is not as straightforward as in OFDM systems
At the same time, since the FBMC-OQAM system can only maintain the orthogonality in the real number domain, the imaginary part of the received symbol will be interfered by other time-frequency symbols, which brings difficulties to the channel coefficient estimation of complex numbers

Method used

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  • FBMC-OQAM timing and channel estimation training sequence design method
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  • FBMC-OQAM timing and channel estimation training sequence design method

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Embodiment 1

[0055] Please refer to figure 2 , is a schematic flow chart of the FBMC-OQAM timing and channel estimation training sequence design method in an embodiment, the method comprising:

[0056] Step 1, obtaining a sequence of data symbols to be transmitted.

[0057] The transmitter of the FBMC-OQAM system groups the original data to be transmitted, and performs serial-to-parallel conversion on each group of original data to obtain the data symbol sequence to be transmitted. In one embodiment, each FBMC symbol includes an even number of working subcarriers, and each working subcarrier in the FBMC symbol is sorted in order of arrangement, and its sequence number is 0, 1, 2, ... M-1, and M is greater than even number of 0.

[0058] Step 2, generate training sequences.

[0059] The training sequence is used for timing synchronization and channel coefficient estimation in the frequency domain of the FBMC-OQAM system. Please refer to image 3 , is a schematic diagram of the trainin...

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Abstract

The invention discloses an FBMC-OQAM timing and channel estimation training sequence design method and system, and relates to the field of wireless communication. The training sequence is composed ofthree continuous FBMC symbols and comprises two auxiliary data symbols and a pilot symbol located between the two auxiliary data symbols. The working subcarrier modulation data of odd or even serial number bits of the pilot symbol is set to be zero. Working subcarrier modulation data corresponding to odd and even serial number bits of two auxiliary data symbols are the same or opposite to each other, so that a sequence with a conjugate symmetry characteristic in a time domain is constructed, and a timing synchronization function can be completed through the conjugate symmetry characteristic ofthe sequence. Besides, by utilizing the symmetry characteristic of imaginary part interference in the FBMC-OQAM system on a time-frequency plane, the training sequence not only can be used for symboltiming synchronization, but also can be used for frequency domain channel estimation after filtering of the FBMC-OQAM system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a FBMC-OQAM timing and channel estimation training sequence design method. Background technique [0002] In recent years, multi-carrier modulation as a communication waveform technology has been widely used in various communication systems. The basic idea is to divide the transmission bit stream into multiple sub-bit streams, and then modulate them on different sub-carriers for transmission. Among the many multi-carrier modulation techniques, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) has been widely used because of its high spectral efficiency, low transceiver complexity, simple equalization and easy combination with multi-antenna technology. , such as today's fourth-generation mobile communication Long Term Evolution (LTE, Long Term Evolution) system, digital television broadcasting (DVB, Digital Video Broadcast), wireless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2613H04L27/2692H04L27/2695H04L27/264H04L27/2697Y02D30/70
Inventor 丁丽琴李黎明汪洋
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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