Digital Signal Processing Reference
In-Depth Information
server-side
time-varying channel
noise
encode
modulate
TX
demodulate
RX
interference
multipath
real-time channel
monitoring
magnitude
interference
excessive
noise
1
channel
equalizer
equalized ch.
response
Q
frequency
I
modulation
aware
magnitude
signal reconstruction
2
ISSR
subsystem
frequency
= ignore bands
demap
& decode
= unaffected signal
client-side: signal reconstruction without intervention from the transmitter
Figure 3.1.
The concept of issr: receiver-side signal reconstruction
without any intervention from server-side.
from Bluetooth transmissions make 802
.
11b more than often less than a pale
shadow of itself. At this point, our goal is to harden 802
.
11b-compatible de-
vices against such momentarily problems in the wireless connection. The one
and only condition is that improvements can be implemented without break-
ing compatibility with the current 802
.
11b standard. More specifically, it is not
allowed for the issr method to introduce changes at server-side (i.e. the trans-
mitter), but only at client-side as the implementation details of the receiver are
not imposed by the standard.
At first sight, all this could might an impossible task. At least, ofdm modu-
lation allows the transmitter to avoid transmission over certain subbands. But
