Eric regarding your statement
Another 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.
this is both inaccurate and very old information. he is no doubt referring to IDCC's specific B-CDMA fixed wireless local loop which was 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.
IDCC's IPRs are applicable to all spreads; and worked within IMT2000 can interface with AMPS and all other platforms as required.
each year more and more AMPS users convert to digital formats. it is expected in three to four years AMPS will no longer be around. most majors have stopped manufacturing singular AMPS handsets altogether. conversion to "AMPS" is a low priority for most of the world's mobile users.
this individual needs to communicate directly with IDCC in order to update his database or receive better clarification.
as for "no WCDMA standard". again, I think it is irrelevant what tag you put on direct spread (ARIB, ETSI, TIA) specifications, be it UMTS or WCDMA. bottom line is that a Wideband CDMA specification standard does exist for the DS mode. |
