Design of OFDM Joint Synchronization Algorithm Based on Cyclic Prefix

By studying the Maximum Likelihood (ML) algorithm and applying it to Orthogonal Frequency Division Multiplexing (OFDM) system, we analyze its performance. OFDM system has obvious advantages over other wireless communication systems, but it also has disadvantages, such as being sensitive to synchroni...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-07, Vol.563 (5), p.52017
Main Authors: Liu, Mengyang, Wang, Hongjuan, Li, Yeli, Bian, Yuning
Format: Article
Language:English
Subjects:
Algorithms
Carrier frequencies
Design parameters
Frequency synchronization
Maximum likelihood estimation
Orthogonal Frequency Division Multiplexing
Wireless communication systems
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Summary:By studying the Maximum Likelihood (ML) algorithm and applying it to Orthogonal Frequency Division Multiplexing (OFDM) system, we analyze its performance. OFDM system has obvious advantages over other wireless communication systems, but it also has disadvantages, such as being sensitive to synchronization errors. The ML algorithm can solve this shortcoming of OFDM system. ML algorithm uses the redundant information carried by the cyclic prefix in OFDM code element. At the same time, ML algorithm calculates its maximum likelihood estimation algorithm to complete the code element timing synchronization and carrier frequency synchronization. Compared with other synchronization algorithms, ML algorithm can complete initial capture and synchronous tracking in one step, so it is widely used in OFDM systems. In this paper, we build a traditional OFDM system and apply the ML algorithm to OFDM synchronization simulation. By changing the design of relevant parameters, we describe the ML algorithm in detail and obtain the same results as the theory.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/563/5/052017