If you have line of sight and can use fixed beacons whose position is known apriori, ultrasound is a good bet. However, if you need to track multiple objects wi

If you have line of sight and can use fixed beacons whose position is known apriori, ultrasound is a good bet. However, if you need to track multiple objects within a defined space, things get tricky with ultrasound. Also, if 100hz is a strict requirement, ultrasound is not a great option due to issues such as signal attenuation in the environment.