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Boki
electronics forum Guru
Joined: 05 May 2005
Posts: 350
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 Posted: Thu Jul 20, 2006 1:26 am Post subject:
Receiver sensitivity BER. The lower the better?
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Hi All,
In communication, the BER is the lower the better, right?
Best regards,
Boki. |
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Joel Kolstad
electronics forum Guru
Joined: 03 May 2005
Posts: 695
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| Posted: Thu Jul 20, 2006 1:58 am Post subject:
Re: Receiver sensitivity BER. The lower the better?
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"Boki" <bokiteam@ms21.hinet.net> wrote in message
news:1153358762.002278.92910@i3g2000cwc.googlegroups.com...
| Quote: | In communication, the BER is the lower the better, right?
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Generally, yes -- BER = Bit Error Rate, and fewer errors are better.
Most real systems are designed to operate with a given BER or better, so
from a certain point of view achieving a BER well in excess of what's
necessary is most likely a waste of resources, but no one's ever going to
complain if you can deliver a better BER without spending more money. |
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Boki
electronics forum Guru
Joined: 05 May 2005
Posts: 350
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| Posted: Thu Jul 20, 2006 7:50 am Post subject:
Re: Receiver sensitivity BER. The lower the better?
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Joel Kolstad 寫道：
| Quote: | "Boki" <bokiteam@ms21.hinet.net> wrote in message
news:1153358762.002278.92910@i3g2000cwc.googlegroups.com...
In communication, the BER is the lower the better, right?
Generally, yes -- BER = Bit Error Rate, and fewer errors are better.
Most real systems are designed to operate with a given BER or better, so
from a certain point of view achieving a BER well in excess of what's
necessary is most likely a waste of resources, but no one's ever going to
complain if you can deliver a better BER without spending more money.
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How about Bluetooth?
When I get BER = 0.01% ,so I reduce my power to make BER close to 0.1%
so I can get less power consumption, does this make sense? ( I don't
know answer )
Best regards,
Boki. |
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mike
electronics forum beginner
Joined: 20 Oct 2005
Posts: 28
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| Posted: Thu Jul 20, 2006 1:41 pm Post subject:
Re: Receiver sensitivity BER. The lower the better?
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"Boki" <bokiteam@ms21.hinet.net> wrote in message
news:1153358762.002278.92910@i3g2000cwc.googlegroups.com...
| Quote: | Hi All,
In communication, the BER is the lower the better, right?
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Nope. The optimum is best, and the system designers have to decide how to
define optimum.
-- Mike -- |
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Joel Kolstad
electronics forum Guru
Joined: 03 May 2005
Posts: 695
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| Posted: Thu Jul 20, 2006 4:32 pm Post subject:
Re: Receiver sensitivity BER. The lower the better?
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Hi Boki,
"Boki" <bokiteam@ms21.hinet.net> wrote in message
news:1153381823.655868.55620@i3g2000cwc.googlegroups.com...
"How about Bluetooth?
When I get BER = 0.01% ,so I reduce my power to make BER close to 0.1%
so I can get less power consumption, does this make sense?"
I don't know the particulars of Bluetooth, but from Googling around it looks
like the spec says that you are supposed to achieve a BER of 0.1%. Hence,
*so long as you can achieve that BER at the distance required*, saving power
looks like a win.
If you build your hardware such that it has this "power-save" mode
available, you can always make this issue their problem by telling them you
want them to drop into power-save mode whenever the BER is 0.1% or lower,
and otherwise run at the higher power -- this is a very common technique.
---Joel |
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