Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11006418 | Base station and wireless communication method | — | 2021-05-11 |
| 10499395 | Communication system, base station, and communication control method | Toru Sahara | 2019-12-03 |
| 10405313 | Base station and wireless communication method | — | 2019-09-03 |
| 9686794 | Communication system, communication method, and communication apparatus | Toru Sahara | 2017-06-20 |
| 7792495 | Radio apparatus, transmission control method and transmission control program | Yoshitaka Oshima | 2010-09-07 |
| 7233811 | Radio device with transmission directivity, and control method and control program for the radio device | Masashi Iwami, Yoshiharu Doi, Tadayoshi Itou | 2007-06-19 |
| 7110480 | Adaptive array apparatus | — | 2006-09-19 |
| 7110794 | Adaptive array apparatus and compensation method for compensating a phase difference used for generating a directivity response pattern | — | 2006-09-19 |
| 7075909 | Radio spectrum management apparatus for base stations | — | 2006-07-11 |
| 7035592 | Radio device and method of calibration of antenna directivity | Yoshiharu Doi, Yasunori Akatsuka | 2006-04-25 |
| 6901124 | Diversity receiving apparatus that prevents judgement errors during decoding and a clock generating circuit for a diversity circuit that prevents judgement errors during decoding | — | 2005-05-31 |
| 6870878 | Radio device and method of calibration thereof | Yoshiharu Doi | 2005-03-22 |
| 6771985 | Wireless base station that staggers the transmission of symbols to spatially multiplexed mobile stations by a predetermined time that is shorter than the symbol period | — | 2004-08-03 |
| 6754512 | Wireless base station using adaptive array for spatial multiplexing | — | 2004-06-22 |
| 6636493 | Path division multiple access radio apparatus having directivity control based on received radio strength | Yoshiharu Doi | 2003-10-21 |
| 6496142 | Adaptive array device | — | 2002-12-17 |
| 6161001 | Diversity reception device | — | 2000-12-12 |
| 6157686 | Diversity apparatus with improved ability of reproducing carrier wave in synchronous detection | — | 2000-12-05 |
| 5901187 | Diversity reception device | — | 1999-05-04 |
| 5761252 | Diversity reception device | — | 1998-06-02 |
| 5379322 | Baseband signal generator for digital modulator | Akio Kosaka, Mitsufumi Yoshimoto, Mitsuji Hama | 1995-01-03 |
| 5369378 | Digital DQPSK modulator | Akio Kosaka, Mitsufumi Yoshimoto, Mitsuji Hama | 1994-11-29 |
| 5355092 | Relatively simple QPSK demodulator, that uses substantially all digital circuitry and an internally generated symbol clock, and circuitry for use therein | Akio Kosaka, Masahiro Narita | 1994-10-11 |
| 5225795 | Digital quadrature modulator | — | 1993-07-06 |
| 5175514 | Digital modulator and baseband signal generator for digital modulator | Mitsufumi Yoshimoto | 1992-12-29 |