Propagation path estimation method and apparatus

Details Propagation path estimation method and apparatus Propagation path estimation method and apparatus

2011-07-05

2011-07-05

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S285000, C375S254000, C375S268000

Reexamination Certificate

active

07974350

ABSTRACT:
In estimating propagation path in an OFDM receiver in an OFDM communication system, a CIR estimation unit estimates a group of impulse responses of a propagation path, a valid-impulse discriminator selects impulse responses (CIR), which are greater than a predetermined threshold value, from the impulse-response group, and a propagation path estimation unit generates a matrix expression using a CIR estimation vector that includes the selected CIRs as elements, a matrix S, which is decided based upon number N of points of an IFFT used in OFDM modulation and number Nc of subcarriers used in actual transmission, and a propagation-path response vector, obtains the propagation-path response vector by solving this matrix expression and estimating the propagation path.

REFERENCES:
patent: 4055727 (1977-10-01), Katoh
patent: 4439863 (1984-03-01), Bellamy
patent: 5159610 (1992-10-01), Eyuboglu et al.
patent: 5307376 (1994-04-01), Castelain et al.
patent: 5809080 (1998-09-01), Karabed et al.
patent: 6717990 (2004-04-01), Abousleman
patent: 7167518 (2007-01-01), Wei
patent: 2003/0108117 (2003-06-01), Ketchum et al.
patent: 2006/0203932 (2006-09-01), Palanki et al.
patent: 2008/0152033 (2008-06-01), Gore et al.
patent: 5-75568 (1993-03-01), None
patent: 2000-341242 (2000-12-01), None
patent: 2004-23405 (2004-01-01), None
English translation of JP5075568; Kasutere et al; “Apparatus for Evaluating Frequency Response of Communication Channel and Performing Coherent Demodulation of Digital data Multiplexed in Time-Frequency Region Having Limit Judging Function”, Mar. 26, 1993.
Performance of Forward Link Broadband Packet TD-OFCDM with Interactive Channel Estimation. Technical Report of IEICE. Jan. 2001.
Notification of Reasons for Refusal mailed Aug. 25, 2009, from the corresponding Japanese Application.

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