Method for realizing OFDM system synchronization using circulating prefix

A technology of cyclic prefix and synchronization parameters, which is applied in the field of cyclic prefix synchronization of OFDM systems, and can solve the problems of occupied bandwidth, complex algorithm, poor accuracy, etc.
CN1878157AInactive Publication Date: 2006-12-13ZTE CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2006-12-13
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a synchronizing method of circulating prefix OFDM system, which comprises the following steps: step A. finding the circulating prefix with maximum energy; step B. rotating the OFDM symbol to the corresponding position of maximum energy circulating prefix; realizing synchronous parameter of coherent estimation at receiving end. The invention simplifies effective control for PAPR, which needn't larger calculating expenditure for sending and receiving ends.
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Description

technical field

[0001] The invention relates to an OFDM system synchronization method, in particular to a cyclic prefix synchronization method of the OFDM system. Background technique

[0002] Orthogonal Frequency Diversity Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology has aroused great interest in the industry in recent years because of its good anti-fast fading channel performance and simple implementation. In IEEE 802.11 series and European DVB-T There are applications. However, the two biggest weaknesses of OFDM, sensitivity to frequency offset and large PAPR (ratio of peak power to average power), limit the application of this technology.

[0003] OFDM synchronization includes time synchronization and frequency synchronization. Traditional OFDM synchronization techniques include three types in terms of bandwidth utilization: first, transmit training symbols at the sending end, and estimate frequency offset and time offset parameters at the...

Claims

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