So then are you alleging total channel performance is impaired? Again what are your stats?
This conclusion is not logical, by the article writer. Sensitivity is NOT concluded to be higher, only that total channel performance is higher,
Ahh, so you agree that total channel performance is higher then? Those are your words aren't they?
Or, you can crank up your TX level to full strength (something that is rarely done) to compensate as well. This results in increased battery power consumption, which is also being reported in some iPhones.
Are you alleging that the IPhone has cranked up the TX? That is very easy to test. Do you have the data to back your claim?
Knowing how total channel performance is a combination of TX and RX, you can compensate for some loss in RX performance by increasing TX output. And that may be what is happening with the iPhone 4, and provides some improvement in total performance.
Again do you have any data to support that claim? Or are you being intentionally noncommittal? Words like 'may' are weasel words.
There is nothing taken out of context, and I thought for someone with some RF background and an EE degree this would be pretty obvious. The relation of these facts and surmising should be obvious for most EEs.
Nothing taken out of context? You haven't even clearly stated what you think is happening.
Please clearly state what you think is happening with evidence to back it up. I would really like to see APPLES to APPLES comparisons. Specifically on TX and RX values.
Yes. Please see the aforementioned graph and the FCC limit on TX power. Put the two together. Then add in all the measurements and reports by users in the field where a held iPhone 4 either loses all connection or is much slower and weaker (in measured download rates) than iPhone 3GS models.
Ahh, so you agree that total channel performance is higher then? Those are your words aren't they?
If TX power is turned up to full, and the other phones leave it down, yes this is true. Like I stated originally, the Nexus One, when held, can have the same total channel performance with 125 mW as the iPhone 4 with 1W of TX power. If the Nexus One runs at 100 mW (and cell phones try to run as little as possible), then the iPhone 4 can have better total performance. At the cost of 10X the TX power, and subsequent issues with battery life.
Are you alleging that the IPhone has cranked up the TX? That is very easy to test. Do you have the data to back your claim?
It's an educated guess based upon a sum of the data points presented. Do you have data to the contrary?
Nothing taken out of context? You haven't even clearly stated what you think is happening.
On the contrary, I've been quite clear:
- iPhone 4 reception sensitivity is lower, as measured (see table above, and lots of other documented tests all over the Internet)
- some iPhone 4 owners have reported poor battery life, which would be consistent with the way cell-phones operate when having reception issues (TX power is turned up, and new cells are connected, both of which require more power)
Summation: the iPhone 4 may compensate for weak reception by increasing TX power and/or constantly seeking and connecting to slightly better cells. That would be a consistent, educated summation.
What is your position, and what is your documentation to substantiate it? Or is that only required of me?