On Nov. 2 '97, the first ever QSO in Japan, using Spread Spectrum (SS) over
ham radio, was performed by JJ1CEI/4 and 7K1NCP/6, with the support of the
PRUG96 project.
We, PRUG96 members, went to Kitakyushu-city (Kyushu-island; the southern part
of Japan) to join
Partech '97. There, we demonstrated SS QSO on 2.4GHz band, for the first
time.
Before the conference, some members including Mr. Mano (JJ1CEI) brought
the system
over to Shimonoseki-city (Honshu-island). Of course, other members and I, in
Kitakyushu, prepared for the QSO and waited for their QRV.
The first ever QSO using SS was achieved between Kyushu-island and
Honshu-island, holding the Straits of Kanmon. Not only had we accomplished
2way SS QSO for the first time, but also this QSO has a special meaning bacause
we used TCP/IP over SS amateur packet radio.
Technical information can be referred from
PRUG96 webpage.
Also, you can see
Mr. Kanno(JN1JDZ)'s report on the aspect viewing from Shimonoseki.
| SS TRANSCEIVER | |
| Center Frequency | 2446MHz |
| Output Power | less than 100mW (maybe 20mW or so) |
| Spreading Method | Direct Sequence |
| Spread Length & Code | 11bits Baker, 63bits m |
| Chipping Rate | 4.4444Mchips/sec |
| Occupied Band Width | 8MHz |
| Modulation | DQPSK |
| Data Transfer Rate | 808kbps |
SS Transcever and IPSM
27 elements Yagi beaming to Shimonoseki-city over the Straits of Kanmon