Hi,
On Friday 06 January 2006 15:53, Chakkaphong St. wrote:
> How can I map transmission power with the value of bandwidth? I am working
> about the transmission power in wireless network. I am also using shadowing
Simple answer - you cannot. Bandwidth is not related to the transmission
power. Maybe you mean the different receiver sensitivities (RXTresh_) for the
different modulation schemes? Here are the values from the Cisco AiroNet 350
spec:
BPSK @1Mbps -94dBm
QPSK @2Mbps -91dBm
CCK @5.5Mbps -89dBm
CCK @11Mbps -85dBm
OFDM @6Mbps -85dBm
OFDM @9Mbps -84dBm
OFDM @12Mbps -82dBm
OFDM @18Mbps -80dBm
OFDM @24Mbps -77dBm
OFDM @36Mbps -73dBm
OFDM @48Mbps -69dBm
OFDM @54Mbps -68dBm
> propagation model
> with transmission power = 0.2818 Watt, which provides 250m communication
> range. The other mapping between
This is incomplete. The (mean) transmission range in the shadowing model is
defined by Pt_, RXTresh_, PathLossExp_. The variance of the range is defined
by std_db_. You do not have a constant communication range. Just as an
example: with PathLossExp_ = 3.6 and std_db_ =4 you get transmission ranges
between 70 and over 350m!
Daniel.
--
Dipl.-Inf. Daniel Mahrenholz, University of Magdeburg, Germany
Homepage: http://ivs.cs.uni-magdeburg.de/~mahrenho
