Title:
METHOD AND APPARATUS FOR NOISE ESTIMATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM
Document Type and Number:
WIPO Patent Application WO/2010/148853
Kind Code:
A1
Abstract:
A Method and apparatus for noise estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system is disclosed. The method includes the following steps: a channel estimation coefficient generation module generates a channel estimation coefficient w
k
, wherein k is an integer between -Ntap/2 to Ntap/2, and N
tap
is a positive integer that is greater than 1; a channel estimation module calculates to get a channel estimator according to a received signal on a sub carrier wave of a Orthogonal Frequency Division Multiplexing (OFDM) symbol and the channel estimation coefficient; a noise estimator calculation module calculates to get a noise estimator according to the received signal on the sub carrier wave of the OFDM symbol and the channel estimator; a correction factor calculation module calculates a correction factor β according to the channel estimation coefficient w
k
that is generated by the channel estimation coefficient generation module; a correction module corrects the noise estimator that is outputted by the noise estimator calculation module according to the correction factor β. The method and the apparatus can achieve a minor estimation error and lower complexity simultaneously.
Inventors:
ZHANG JUNLING (CN)
Application Number:
PCT/CN2010/073017
Publication Date:
December 29, 2010
Filing Date:
May 20, 2010
Export Citation:
Assignee:
ZTE CORP (CN)
ZHANG JUNLING (CN)
ZHANG JUNLING (CN)
International Classes:
H04L27/26
Foreign References:
| CN101557378A | 2009-10-14 | |||
| CN1823485A | 2006-08-23 | |||
| US20080181325A1 | 2008-07-31 | |||
| US20070280097A1 | 2007-12-06 |
Other References:
See also references of EP 2487851A4
None
None
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (8 Xue Qing Rd. Haidian, Beijing 2, CN)
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