Parkervision Inc. Message Board
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It's quiz time....
Let’s see how much we’ve learnt recently about how cell phones and networks inter-operate. Some questions have more than one correct answer, but always have at least one wrong answer.
1. Why do carriers buy frequency spectrum ?
a) they like spending billions of dollars
b) to increase the number of potential customers
c) to increase network capacity
d) to stop their competitors getting it
2. How does a carrier increase network capacity in an urban area ?
a) by limiting data rates to individual users
b) by increasing the number of cell sites (smaller individual cells)
c) by reducing the number the cell sites (larger individual cells)
d) by increasing phone transmit power
3. How does a carrier increase network capacity in an sub-urban / rural area ?
a) by permitting roaming onto competitors networks
b) by increasing the number of cell sites (smaller individual cells)
c) by reducing the number the cell sites (larger individual cells)
d) increasing phone transmit power
4. What happens when a phone is in a 3g high speed data session and is at the edge of the cell ?
a) The transmitter attempts to maintain maximum data rate, ramps to maximum power and eventually drops the call
b) The network tells the transmitter to back off the data rate while adjusting tx power
c) The network tells the transmitter to hand off to a 2 /2.5g network which offers a better signal
d) The mobile searches out a better signal and hands off
5. At what power level does a 3g phone spend most time transmitting ?
a) +23dBm
b) +14dBm
c) +7dBm
d) 0dBm or lower
6. During the average daily use cycle of a phone, what consumes the most mW/hours from the battery ?
a) The RF stages, including PA
b) The baseband processor including memory
c) Display back lighting
d) Audio speaker drivers
7. During the average daily use cycle of a phone, what consumes the second most mW/hours from the battery ?
a) The RF stages, including PA
b) The baseband processor including memory
c) Display back lighting
d) Audio speaker drivers-
So I have two questions.
1. How come the multiple choice answers for how do carriers put more users in the same band width did not include an option for reducing side channel re-radiation to increase density? Could that be because the LTE screens on the PRKR websit show relly really low side channel re-radiation?
2. If the power consumption and transmit power is as low as you say it is, and it's not, why don't you re-publish some of the talk time calculations for us based on these numbers you keep claiming as gospel and then lets compare that to the actual talk times the phones are actually getting and then discuss where the differneces lie. Also the 0 dbm thing is very misleading to untrained personnel because dbm is on a log scale. So even if a phone spends most of its time at 0 dbm like you claim but transmitts only say 5% of the time at 20 dbm or God foirbid 28 dbm the difference is not 20 or 28 times more power draw its 100 times and 1000 times respectively and that really effects the avrerage power consumption in real phones transmitting in real life conditions. Everyone knows this. If your an engineer then you know this yet never mention the things that actually consume the excessive transmit power in real phones. So the fact remains that actual talk times in the real 3G phones out there came in at 30% or so of calculated talk times. Furthermore smaller more numerous cells won't do the trick because it assume everyone has line of sight to the tower. What really consumes power is when I want to continue a conversation when stepping into an elevator or driving my car between two tractor trailers or standing behind my office building (cell tower on the other side) having a smoke. In all these situations the phone ramps up the power to maintain the connection and that consumes many many times more power than the ideal state you describe and that's the problem which none of these strategies do much about. PRKR on the other hand improves the transmit drain efficiency over the entire power spectrum and so the real phone under eal conditions using that technology will consume less power when encountering these real life inconveniences.- 2 Replies to gordon_atheling
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I would add one: "phony phone" seems to be trying to diminish the value of "full duplex" and even overall tx efficiency, but don't all chipset mfgs, OEMs, and especially carriers want users to have as much of a full duplex experience as possible?
Afterall, their common competitors from which they are really trying to steal market share from are the wireline guys. They want more people spending more time on wireless, or even choosing to go 100% wireless, particularly as the developing world builds out their networks.
Burst mode, along with other compromises and drawbacks, is a big reason I prefer to have long and/or important conversations on wireline, and I doubt I am the exception in that regard. So better tx efficiency and linearity in handsets equals a much better overall 3g market opportunity by improving the customer experience and lowering the required tower density, which also helps the industry by bringing down the cost of competing against wireline. -
Stop smoking. You will increase you battery life.
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his bash is his first known post on this board - under the screen name "FARMWALD" ... when he couldn't maintain the arguement that it didn't work well, he went on to other rationalizations about how PV used 'tricks' ... a now familiar pattern of ever morphing justifications for his short position, except that now he makes stuff up that is becoming easier and easier to knock down.
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The more than decent range of the wi-fi product -- which Farmwald bashed in, I think, a CompUSA user comment -- was do to overall good design, including the D2D chip, the SkyCross antenna, and the diversity architecture.
Why did Farmwald have to say it was bad? Was he being honest about that? Why didn't he say it was good, but not because of the D2D circuit?
By the way, I am using the router on the second floor of a building, and get excellent performance from the NIC next door, through two brick walls at more than 100 feet away. -
Is no one smart / brave enough to take a shot at this ?
Maybe I made the questions too hard ?
Or maybe the correct answers might be too painful for some.- 2 Replies to phone_engineer87
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OK, P_E, I’ll take a pass at it. However, for some I’m going to mark a 1st and 2nd guess. We’ll see how I do.
Your questions certainly seem to have riled some of the touchy longs. I particularly enjoyed the “not related to parkervision” answers.
As I see it, a cell phone network is a highly integrated device set where every subsystem has impact on every other subsystem. The only way you could argue “Not related to parkervision” is to argue that parkervision is not in the cell phone business.
Wait a minute! Come to think of it…they’re not.
1. Why do carriers buy frequency spectrum ?
a) they like spending billions of dollars
b) to increase the number of potential customers (X FIRST CHOICE)
c) to increase network capacity (X 2ND CHOICE)
d) to stop their competitors getting it
2. How does a carrier increase network capacity in an urban area ?
a) by limiting data rates to individual users
b) by increasing the number of cell sites (smaller individual cells) (X FIRST CHOICE)
c) by reducing the number the cell sites (larger individual cells)
d) by increasing phone transmit power
3. How does a carrier increase network capacity in an sub-urban / rural area ?
a) by permitting roaming onto competitors networks (X FIRST CHOICE)
b) by increasing the number of cell sites (smaller individual cells) (X 2ND CHOICE)
c) by reducing the number the cell sites (larger individual cells)
d) increasing phone transmit power
4. What happens when a phone is in a 3g high speed data session and is at the edge of the cell ?
a) The transmitter attempts to maintain maximum data rate, ramps to maximum power and eventually drops the call
b) The network tells the transmitter to back off the data rate while adjusting tx power
c) The network tells the transmitter to hand off to a 2 /2.5g network which offers a better signal (X 2ND CHOICE)
d) The mobile searches out a better signal and hands off (X FIRST CHOICE)
5. At what power level does a 3g phone spend most time transmitting ?
a) +23dBm
b) +14dBm
c) +7dBm
d) 0dBm or lower (X FIRST CHOICE)
6. During the average daily use cycle of a phone, what consumes the most mW/hours from the battery ?
a) The RF stages, including PA
b) The baseband processor including memory (X FIRST CHOICE)
c) Display back lighting
d) Audio speaker drivers
7. During the average daily use cycle of a phone, what consumes the second most mW/hours from the battery ?
a) The RF stages, including PA
b) The baseband processor including memory
c) Display back lighting (X FIRST CHOICE)
d) Audio speaker drivers -
or maybe no one believes you're this unbiased resourse, because you made the statement below 5 minutes after Farmwald bugged out.
"Later when the sad truth comes out, I might reveal who I am"
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