Method and equipment for multi-frequency deviation carrier synchronization and channel evaluation

A carrier synchronization and channel estimation technology, applied in multi-carrier systems, multi-frequency code systems, shaping networks in transmitters/receivers, etc., can solve problems such as the influence of pilot sequences

Inactive Publication Date: 2008-11-12
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
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Problems solved by technology

In addition, due to the existence of multiple frequency offsets, the transmitted pilot sequence for channel estimation will also be affected by it

Method used

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  • Method and equipment for multi-frequency deviation carrier synchronization and channel evaluation
  • Method and equipment for multi-frequency deviation carrier synchronization and channel evaluation
  • Method and equipment for multi-frequency deviation carrier synchronization and channel evaluation

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Embodiment Construction

[0052] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated.

[0053] The method for multi-frequency offset carrier synchronization and channel estimation of the present invention includes:

[0054] The receiver first performs symbol synchronization on the received signal to obtain the initial position estimation of the fast Fourier transform. According to the initial position estimation of the synchronization symbol, in different systems, according to the different accuracy requirements, one of them is initialized by the method. The frequency offset value of the root antenna;

[0055] Through the method, the initialization frequency offset value is brought into the iterative process, and in each iteration, the frequency offset of each transmitting antenna relative to the receiving antenna is estimated by eliminating the influence of the estimated frequency of...

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Abstract

The invention discloses a method and a device for the multiple-frequency offset carrier synchronization and channel estimation of a multiple-antenna multiple-carrier system and includes the following steps: after making sign synchronization compensation of received signals, a receiver initializes the frequency offset value of a transmitter antenna and compensates the received signals with the initialized frequency offset value; the frequency offset value of each transmitter antenna to each receiving antenna are estimated and the channel state information between each transmitter antenna and each receiving antenna is estimated; frequency offset compensation and channel balance are carried out to the received signals according to the frequency offset value and the channel state information. The method and the device can estimate the multiple-frequency offset and the corresponding channel impulse response of the multiple-antenna multiple-carrier system accurately and effectively.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a multi-frequency offset carrier synchronization and channel estimation method suitable for a multi-antenna multi-carrier system. Background technique [0002] With the development of wireless communication technology, multi-carrier technology, especially Orthogonal Frequency Division Multiplexing (OFDM) technology, has been introduced into wireless LAN and In the wireless metropolitan area network standard, and in the Long Term Evolution (LTE for short) research initiated by the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP for short), OFDM has been adopted as a downlink multiple access method. At the same time, in order to improve spectrum utilization and communication system throughput, Multi-input Multi-output (MIMO) is also regarded as one of the technologies that must be adopted in future mobile communications. are also adopted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/38H04L25/03
Inventor 张建华张平张炎炎张治刘宝玲
Owner BEIJING UNIV OF POSTS & TELECOMM
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