Interesting People mailing list archives
Re: Japan's Personal Handyphone Systems
From: Stephen Wolff <swolff () cisco com>
Date: Tue, 13 Jun 1995 17:21:45 -0400
The June '95 issue of IEEE Communications Magazine (Vol. 33, No. 6) is devoted to "Mobility in INtelligent Networks". The first article, "Emerging Mobile and Personal Communication Systems" by Raj Pandya of BNR, has a section on Cordless Telecommunications that compares and contrasts the UK-originated CT2, the Japanese PHS, and the European DECT standards, along with a (IMHO) somewhat muddled US approach. Of particular interest for those of us with short attention spans is Table 2 on p. 48 which I excerpt below: CT2 DECT PHS Access method FDMA/TDD TDMA/TDD TDMA/TDD Spectrum allocation (MHz) 864-868 1880-1900 1895-1918 Carrier spacing (KHz) 100 1728 300 Number of carriers 40 10 77 Channels/carrier 1 12 4 Modulation GFSK GFSK pi/4 shifted QPSK Transmission rate (Kb/s) 72 1152 384 Speech coding <----------------32 Kb/s ADPCM----------------> Frame duration (ms) 2 10 5 Peak output power (mW) 10 250 10 Cheers, -s Stephen Wolff Business Development Cisco Systems 703-715-4075(V), -4044(F)
Current thread:
- Japan's Personal Handyphone Systems Dave Farber (Jun 01)
- <Possible follow-ups>
- Re: Japan's Personal Handyphone Systems Stephen Wolff (Jun 13)