| ??? 02/19/05 15:37 Read: times |
#87965 - A better idea Responding to: ???'s previous message |
A nice idea I used which is based on modern radar techniques designed to increase spacial resolution is to send your pulse as a pseudo random sequence and implement a matched filter which is basicaly a FIR with the tap co-efficients set as time reversed version of the transmitted pulse.
The matched filter performs auto-correleation on the recived pulse. Through some slightly wiggly maths you can show that this is efffectivly the same as sending a very short pulse at a high signal amplitude but without all the hassle of actualy generating the very short pulse.The matched filter has the effect of compressing the recieved pulse in time. |
| Topic | Author | Date |
| ultrasonic range finder code problem | 01/01/70 00:00 | |
| Correllation | 01/01/70 00:00 | |
| SensComp Application Notes | 01/01/70 00:00 | |
| A better idea | 01/01/70 00:00 | |
| DSP | 01/01/70 00:00 | |
| increased resolution. | 01/01/70 00:00 | |
| forgot | 01/01/70 00:00 | |
Why is it nessarry | 01/01/70 00:00 |