| ??? 06/30/05 01:38 Read: times |
#96261 - SNR Responding to: ???'s previous message |
By the way does anybody knows some kind of rule of tumb for a minimun SNR (signal to noise ratio) that a receiver must find in order to work in some way. I know it probably has to do with BER (bit error rate) and good old shannon theorem of channel utilization
I'm not concerned about BER, i'm planning to send the On command many many many, many! times I found that moderm modems in order to be cheap they can work with 3 or 6 dB of SNR I made an estimated of 6 dB of SNR for 600 meters in my system dB = 20 log10 ( Vreceive / Vnoise) is it too little? Too much things have to be considerated! i'm going to have a look of Proakis' signal communitations book For those who wonder i'm going to send the information in ASK (cheaper :D than FSK but with more BER :( ) with a carrier of 60kHZ |
| Topic | Author | Date |
| Power Line Channel | 01/01/70 00:00 | |
| broadcast in noise | 01/01/70 00:00 | |
| Broadcast Vs Addressing | 01/01/70 00:00 | |
| erk | 01/01/70 00:00 | |
| Just some things | 01/01/70 00:00 | |
| Got it | 01/01/70 00:00 | |
| Horses for Courses | 01/01/70 00:00 | |
| just curious, why not a photocell at eac | 01/01/70 00:00 | |
| Radio | 01/01/70 00:00 | |
| Zigbee? | 01/01/70 00:00 | |
| great minds think alike | 01/01/70 00:00 | |
| you have my deepest sympathy | 01/01/70 00:00 | |
| Baby steps | 01/01/70 00:00 | |
| and.. | 01/01/70 00:00 | |
| Connection | 01/01/70 00:00 | |
| Hmmm | 01/01/70 00:00 | |
| MSN | 01/01/70 00:00 | |
| Nop | 01/01/70 00:00 | |
| K k | 01/01/70 00:00 | |
| kilometer | 01/01/70 00:00 | |
| what would he mean? | 01/01/70 00:00 | |
| Binary | 01/01/70 00:00 | |
| Is no guess, is only know. | 01/01/70 00:00 | |
| Mexico | 01/01/70 00:00 | |
| X10 -like | 01/01/70 00:00 | |
| Actualization | 01/01/70 00:00 | |
| K k | 01/01/70 00:00 | |
| kHz | 01/01/70 00:00 | |
| Andy Neil alias Mr. Perfectionist !! | 01/01/70 00:00 | |
| X10 like | 01/01/70 00:00 | |
| Pulse position? | 01/01/70 00:00 | |
| Existing systems | 01/01/70 00:00 | |
| Pulse position | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| AT89S8252 : lcd | 01/01/70 00:00 | |
| Huh? | 01/01/70 00:00 | |
| Off-Topic | 01/01/70 00:00 | |
| impedance matching | 01/01/70 00:00 | |
| I see dead computers | 01/01/70 00:00 | |
file transfer using power lines | 01/01/70 00:00 | |
| X2 Rated | 01/01/70 00:00 | |
| RF switching | 01/01/70 00:00 | |
| Try it ! | 01/01/70 00:00 | |
| Ya, sure | 01/01/70 00:00 | |
| $200? | 01/01/70 00:00 | |
| Not necessarily Xbee | 01/01/70 00:00 | |
| another solution | 01/01/70 00:00 | |
| well... | 01/01/70 00:00 | |
| maybe... | 01/01/70 00:00 | |
| mains born network | 01/01/70 00:00 | |
| 8000 pieces | 01/01/70 00:00 | |
| re: | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| re:cost | 01/01/70 00:00 | |
| Cost? | 01/01/70 00:00 | |
| Cost | 01/01/70 00:00 | |
| SNR | 01/01/70 00:00 | |
| BER | 01/01/70 00:00 | |
| checksum to the hilt | 01/01/70 00:00 | |
| CRC, not checksum | 01/01/70 00:00 | |
| Duplex | 01/01/70 00:00 | |
| if he can afford an occasional miss | 01/01/70 00:00 | |
| checksum | 01/01/70 00:00 | |
| checksum and short | 01/01/70 00:00 | |
| Test set | 01/01/70 00:00 | |
| 1143.12345 Hz | 01/01/70 00:00 | |
| maybe once in a year | 01/01/70 00:00 | |
| Idea CRC | 01/01/70 00:00 | |
| SNR ? | 01/01/70 00:00 | |
| Frequency | 01/01/70 00:00 | |
| Lower frequencies | 01/01/70 00:00 | |
| Noise Floor | 01/01/70 00:00 | |
| 10% | 01/01/70 00:00 | |
| Data Rate | 01/01/70 00:00 | |
| re:10% error rate | 01/01/70 00:00 |