Low Bandwidth Application
Low Bandwidth Application
(OP)
Hi everyone,
I am doing a trade study on replacing the wires on the sensor network for a wireless sensor network.
These sensors for example would measure pressure or temperature. I do not need a high-bandwidth standard. What do you recommend for my application.
So far I have done some research in Bluetooth, but it seems like its a high data rate transfer, and has a time slot of 625uS. Which is a lot faster than what I need.
Can this time slot be modified? I only need to send and receive once every 10 seconds or so. And my the amount of data I must send tops out at 3 Bytes. As from before these signals are only used to take readings from sensors.
Any input would be helpful. I was thinking of may be taking some of the standards and modifying it a little bit so I can get maximum battery life out.
Thanks!,
Garl
I am doing a trade study on replacing the wires on the sensor network for a wireless sensor network.
These sensors for example would measure pressure or temperature. I do not need a high-bandwidth standard. What do you recommend for my application.
So far I have done some research in Bluetooth, but it seems like its a high data rate transfer, and has a time slot of 625uS. Which is a lot faster than what I need.
Can this time slot be modified? I only need to send and receive once every 10 seconds or so. And my the amount of data I must send tops out at 3 Bytes. As from before these signals are only used to take readings from sensors.
Any input would be helpful. I was thinking of may be taking some of the standards and modifying it a little bit so I can get maximum battery life out.
Thanks!,
Garl





RE: Low Bandwidth Application
Direct-sequence Spread Spectrum (DSSS) is another good choice. I would recommend a spreading gain of 16 dB or more and use BPSK or maybe pi/2 Differential BPSK.
The RF frequency is also important--you need to pick one that you are allowed to operate in (900 MHz, 2.4 GHz range) if you want to use unlicensed--typically lower is better.
Search Google to get some ideas.