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To: Clarksterh who wrote (13923)	7/18/2001 8:19:48 AM
From: 49thMIMOMander	Read Replies (1) \| Respond to of 34857

-the point with the CDMA cocktail parties is to have small, sensitivity inefficient cells. Normal RF stuff can be extremely sensitive, like AM, FM receivers, if the RF filters clean up all the adjacent bands, no other signals are present in the band, high linearty is not a must. -low dynamics,especially because of need for tight, limiting power control. Should have added the need to transmit and receive at the same time, not like GSM which doesn't do it and can pick up those low level signals without blasting its transmitter att full power at the same time. but the complexity of the received signal also demands much more in terms of dynamics, linearity, stability (power level) to successfully dig out that one channel from the CDMA cocktail party. But with small enough cells and capacity to waste all of this doesn't really matter. Ilmarinen

To: Clarksterh who wrote (13923)	7/18/2001 8:30:28 AM
From: 49thMIMOMander	Respond to of 34857

"But obviously if surrounded by other CDMA users it is acceptable. I presume the FCC takes this into account? " If the timing, amplitude level is stable and perfect, otherwise that long term and instant zero correlation stops being zero. Two signals might ideally have zero correlation, but if one is jittering back and forth, or its amplitude changes, in steps or up or down a multipath fading, they are not anymore. But that is also just some more capacity wasted, doesn't necessarily show up except if one really debugs and characterizes the system under that full capacity load and tough conditions. Ilmarinen That is why it is so nice to have this hierarchical thing of 900 and 1800MHz GPRS/EDGE and then broad band WCDMA above. (OK,OK, QCOM understod to hierarchically separate voice and data)