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To: pass pass who wrote (104086)	9/7/2001 12:50:46 PM
From: Ruffian	Respond to of 152472

What Toys?, iyo................eom.

To: pass pass who wrote (104086)	9/8/2001 1:47:48 AM
From: pheilman_	Read Replies (2) \| Respond to of 152472

Alright you need some education on CDMA. Yes, Spread Spectrum technology was first used by the military for its low probability of intercept and anti-jam properties. The first use was in WW-II possibly based on Hedy Lamar's ideas. Later it was used in several AJ systems that I worked on. PLRS, JTIDS, and DSCS III. The DSCS system first showed glimmers of the CDMA concept. Multiple ground stations shared a band and used different spreading codes. QUALCOMM's innovation is to use orthoganal codes to efficiently share bandwidth in a near-optimal fashion. The near-far problem seemed intractable until solved by a power control loop. With the side benefit of soft handoffs. As far as PHY layer changing, don't think so. There is a bit of money invested in base stations and phones. As far as something "better, cheaper, faster" than CDMA, not easy. OFDM seems like a nice idea, works great on phone lines, but that is a different problem, stable, narrow channel and a lot of processing power available. Walk around a few cities, count the number of cell phones in use, extrapolate.