The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1995
Filed:
Jun. 07, 1993
Akira Nohara, Nishinomiya, JP;
Joji Kane, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A noise suppression apparatus includes a tuner 1 which selectively receives a radio wave signal and transforms it into an electric signal H(k) , a field information detector 2 which detects electric field information of the radio wave signal received by the tuner 1, a noise data generator 6 which generates a noise pattern W(k) on the basis of the electric field information detected by the field information detector 2, a noise canceler 4 which removes an noise component from the signal outputted from the tuner 1, and an amplifier 7 which outputs a noiseless signal outputted from the noise canceler 4. The noise canceler 4 obtains a power spectrum .vertline.X(k).vertline..sup.2 on the basis of the signal H(k) fed from the tuner 1. Thereafter, the noise canceler 4 obtains a noise cancel signal S(k) on the basis of the values of the signal H(k), the noise pattern W(k), and the power spectrum .vertline.X(k).vertline..sup.2. The calculation for obtaining the noise cancel signal S(k) is carried out in accordance with the following equation: