Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Bernard Levy who wrote (5922)	11/10/1999 3:15:00 PM
From: axial	Read Replies (1) \| Respond to of 12823

Bernard - Appreciate the post. I'll try to summarize the arguments I'm getting: 1 - Agreed that VOFDM can overcome line-of-sight (LOS) limitations in a best-case scenario. 2 - It is believed by some that despite that fact, the LOS limitations can only be effectively overcome, in less than ideal situations, by the use of repeater stations, as in a cell network. Furthermore, it was felt things would get worse when we go to Hyperlan (5 GHz). 3 - Conceding the point on VOFDM and rain, it was uniformly expressed that snow, sleet, and sub-zero temperatures were bound to degrade signal quality, and therefore, error-free throughput, in VOFDM. 4 - One indicated that this area was hardly within Cisco's demonstrated area of expertise, and felt that they had bought something that cannot be implemented successfully.(Comment: It was certainly within Clarity's area of expertise). 5 - How many overlapping cells (repeaters) need to be installed to overcome LOS limitations (in the worst case, which establishes a practical minimum)? It is suggested by some that to achieve successful throughput, the VOFDM infrastructure cost may, in fact, exceed the WOFDM cost. The argument here is about cost of implementation to achieve a certain quality of throughput. This will require more research; I mention it since it comes as an early response from others who work in this field, some of whom (apparently) have no stake in Wi-LAN. Back to the research... Best regards, Jim Kayne

To: Bernard Levy who wrote (5922)	11/11/1999 3:40:00 PM
From: axial	Respond to of 12823

Bernard, and Thread - I don't think it is possible to resolve the WOFDM/VOFDM question. The devil is in the details, and though I've read everything I can find about both, there is insufficient information to arrive at anything but probabilities. Different respondents have different interpretations of the same (incomplete) information. Bernard's polite scepticism re: WOFDM is reciprocated by others on VOFDM, who lack his outstanding credentials, but who work at various levels in the wireless industry. Most feel that VOFDM is not viable on a cost/throughput basis. Peter's post, 'way back when, said the market will decide, and that it will be an interesting year. I'll leave it at that, with thanks to this thread for the debate, as far as it went. Best wishes, Jim Kayne