To: Eric L who wrote (4238 ) 5/30/2000 4:58:00 PM From: D.J.Smyth Read Replies (1) | Respond to
Eric regarding your statementAnother odd duck, Interdigtal's wideband CDMA plan uses a 10 MHz path in each direction instead of narrowband's 1.25 MHz channel. Like PCS 1900 and the two systems just discussed, it offers no backward compatibility with AMPS. That compares to IS-95 which we'll see later, a narrowband CDMA arrangement whose handsets default to analog when a CDMA digital channel is missing. Although it does have specific differences with IS-95, none of them seem important enough for it to have come into wide use. tested in 10mghz spreads for Siemens and Samsung. Siemens, however, also utilized upgrades which allowed several spreads, including 5mghz. IDCC, Nortel and Siemens developed an upgrade path for Samsung to deploy a lower spread relative to their China test. he calls it IDCC's "wideband" CDMA, then compares IDCC's fixed architecture to Qualcomm's narrowband mobile architecture. He is comparing apples to oranges in the grossest sense.
