When the ranging signal is transmitted and modulated by digital and analog signals, a certain delay (or distance) error is generated by the transmission and reception of the radio. Usually,4G/Cat-1/NB DTU this delay can be considered to be inevitable, which means that some compensation is needed for this delay in the calculation.

Another similar source of measurement error is the antenna delay, which is delayed by the signal transmitted by the antenna (or the received signal). Moreover, this delay may not be uniform because the delay produced in one direction of radiation may be different from the other.

Multipath refers to the phenomenon that the transmitted signal is reflected and diffracted multiple times from the transmitter to the receiver. This effect can become severe when there is an obstacle between the transmitter and the receiver.

In summary, based on the division of various error sources, we can conclude that there are two sources of error:

1. Fixed deviations caused by various specific delays, we need to give specific compensation

2. The deviation caused by an unknown variable, the master and the slave must be corrected according to the actual situation.

The above mainly describes the principle of ranging and matters needing attention. The following describes the positioning and positioning applications of some E28 modules:

The E28 module ranging positioning does not need to involve GPS positioning technology, which can achieve the minimum size, the lowest power consumption, and the lowest cost. Can be applied to various industries and fields, such as warehouse logistics, animal husbandry, construction industry and so on.

Posted by: flatdirectionalantenna at 09:12 AM | No Comments | Add Comment
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