Title:
RADIO WAVE RECEIVER IMPROVED ENHANCED IN ANTENNA RESOLUTION
Document Type and Number:
Japanese Patent JP3032186
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a radio wave receiver whose antenna resolution is improved by utilizing a transfer function in an azimuth frequency region, resulting from applying Fourier transform to an antenna pattern with respect to an azimuth angle.
SOLUTION: This receiver is provided with a signal processing circuit 6, consisting of a means 6-1 that applies Fourier transformation to an electric field signal outputted from an antenna reception circuit with respect to an azimuth angle, of a means 6-2 that applies Fourier transform to an antenna pattern of an antenna with respect to the azimuth angle, of a means 6-3 that divides a signal resulting from applying Fourier transformation to the electric field signal by a signal resulting from applying Fourier transform to the antenna pattern, of a low-pass filter 6-4 that applies low-pass filter processing to a quotient signal, of a means 6-5 that extracts exponential function components of an output signal from the low-pass filter, of a means 6-6 that extends the frequency band of the output signal of the low-pass filter in excess of a cut-off frequency of the low-pass filter by using the exponential function component, and of a means 6-7 that applies inverse Fourier transformation to a signal whose frequency band is extended with respect to the azimuth angle, and the processing circuit outputs the signal obtained resulting from the inverse Fourier transform as a final antenna output.
Inventors:
Toshihiro Seari
Application Number:
JP28477298A
Publication Date:
April 10, 2000
Filing Date:
September 22, 1998
Export Citation:
Assignee:
Space Development Agency
International Classes:
G06G7/19; G01S3/06; G01S7/28; G01S7/285; G01S7/288; H01Q3/02; H01Q3/26; H04B1/10; H04B1/18; (IPC1-7): H01Q3/02; G01S7/285; G06G7/19; H01Q3/26; H04B1/10; H04B1/18
Domestic Patent References:
| JP843525A | ||||
| JP6269225A |
Other References:
Ｍ．Ａ．Ｒｉｃｈａｒｄｓ，”Ｉｔｅｒａｔｉｖｅ Ｎｏｎｃｏｈｅｒｅｎｔ Ａｎｇｕｌａｒ Ｓｕｐｅｒｒｅｓｏｌｕｔｉｏｎ”，Ｐｒｏｃｅｅｄｉｎｇｓ ｏｆ ｔｈｅ １９８８ Ｎａｔｉｏｎａｌ Ｒａｄａｒ Ｃｏｎｆ．，ｐｐ．１００−１０５，Ａｐｒｉｌ １９８８．
Ｙ．Ｈｕａ ａｎｄ Ｔ．Ｋ．Ｓａｒｋａｒ，”Ａ Ｄｉｓｃｕｓｓｉｏｎ ｏｆ Ｅ−ｐｕｌｓｅ Ｍｅｔｈｏｄ ａｎｄ Ｐｒｏｎｙ’ｓ Ｍｅｔｈｏｄ ｆｏｒ Ｒａｄａｒ Ｔａｒｇｅｔ Ｒｅｓｏｎａｎｃｅ Ｒｅｔｒｉｅｖａｌ ｆｒｏｍ Ｓｃａｔｔｅｒｅｄ Ｆｉｅｌｄ”，ＩＥＥＥ Ｔｒａｎｓ．Ａｎｔｅｎｎａｓ Ｐｒｏｐａｇａｔ．，ｖｏｌ．３７，Ｎｏ．７，ｐｐ．９４４−９４６．Ｊｕｌｙ １９８９
呉，日馬，他，「デコンボリューション法によるレーダ分解能の向上」，電子情報通信学会技術研究報告，Ｖｏｌ．９１，Ｎｏ．４４２（ＳＡＮＥ９１，５４−６１），ｐｐ．２３−２７，１９９２年１月２４日．
Ｙ．Ｈｕａ ａｎｄ Ｔ．Ｋ．Ｓａｒｋａｒ，”Ａ Ｄｉｓｃｕｓｓｉｏｎ ｏｆ Ｅ−ｐｕｌｓｅ Ｍｅｔｈｏｄ ａｎｄ Ｐｒｏｎｙ’ｓ Ｍｅｔｈｏｄ ｆｏｒ Ｒａｄａｒ Ｔａｒｇｅｔ Ｒｅｓｏｎａｎｃｅ Ｒｅｔｒｉｅｖａｌ ｆｒｏｍ Ｓｃａｔｔｅｒｅｄ Ｆｉｅｌｄ”，ＩＥＥＥ Ｔｒａｎｓ．Ａｎｔｅｎｎａｓ Ｐｒｏｐａｇａｔ．，ｖｏｌ．３７，Ｎｏ．７，ｐｐ．９４４−９４６．Ｊｕｌｙ １９８９
呉，日馬，他，「デコンボリューション法によるレーダ分解能の向上」，電子情報通信学会技術研究報告，Ｖｏｌ．９１，Ｎｏ．４４２（ＳＡＮＥ９１，５４−６１），ｐｐ．２３−２７，１９９２年１月２４日．
Attorney, Agent or Firm:
Kenji Mogami
Previous Patent: 分割型誘導加熱コイル
Next Patent: GE-GA-S GLASS COMPOSITION HAVING LIGHT AMPLIFYING PROPERTY, AND DEVICE FOR OPTICAL COMMUNICATION USI...
Next Patent: GE-GA-S GLASS COMPOSITION HAVING LIGHT AMPLIFYING PROPERTY, AND DEVICE FOR OPTICAL COMMUNICATION USI...