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y_sasaki
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re: Imec brings back ultrawideband
y_sasaki   10/17/2011 6:51:24 AM
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UWB is not only meant to high data throughput. Impulse UWB encodes input data to series of very-short radio impulses. Within a given power budget, you can use low-power / high-density impulses for short range / high speed communication, or high-power / low-density impulses for long range / low speed communication. This flexibility is one of the beauty of pure-impulse radio. However in the UWB boom few years ago, most of chip designers abandoned impulse UWB and adopted much ordinary radio methods (namely OFDM). That was because impulse radio has many limitations and difficulties, as much as its benefits. It is interesting how IMEC overcame those difficulties. I still love beauty of impulse radio and want to see if it can hit the market this time.

PJames
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re: Imec brings back ultrawideband
PJames   10/12/2011 9:38:14 PM
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" It could power an MP3 player or headset for more than 17 or 33 hours respectively." Not to pick nits, but this is EE Times. This wireless technology doesn't power devices for certain periods of time. What was intended was to say that this technology would extend the battery life of these devices.

BOMBOVA
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re: Imec brings back ultrawideband
BOMBOVA   10/12/2011 6:16:26 PM
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This is not really UWB, it is convenience bandwidth. some where up there in spectrum, better served for other purposes, such as cellphone close field data.

jsztajer
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re: Imec brings back ultrawideband
jsztajer   10/12/2011 4:36:35 PM
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Please look, maybe it will be interesting for you: http://www.m2mnow.biz/2011/10/10/2941-investment-needed-to-improve-location- accuracy/

chanj0
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re: Imec brings back ultrawideband
chanj0   10/12/2011 4:00:33 PM
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The BW vs power consumption ratio is impressive. I am very interested in the locational feature. Looking for a lost tiny earpiece will become easier. ;)



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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