Circuit, system and method for communication between two nodes of a radio network

摘要

A first node of a radio network initiates a mode for finding the range to a second node. The first node transmits to the second node, with the address of the second node, a range finding command, which switches the second node into the range finding mode and controls a sequence. The first node transmits in a transmission time window a first signal, which is received by the second node in an associated reception time window, a first phase value of the first signal being measured. The second node transmits in a transmission time window a second signal, which is received by the first node in an associated reception time window, a second phase value of the second signal being measured. The first frequency is changed by a frequency difference and the second frequency is changed by the frequency difference in a subsequent time window of the sequence.

主权项

1. A method for communication between two nodes of a radio network, the method comprising:
transmitting, by the first node and to a second node, a first signal at a first frequency, the first signal transmitted during a first time window and having a measurable first phase value; receiving, by the first node, a second signal from the second node, the second signal received at a second frequency, the second signal received during the first time window and having a measurable second phase value; transmitting, by the first node and to the second node, a third signal at a third frequency that is different from the first frequency by a frequency difference, the third signal transmitted during a second time window and having a measurable third phase value; receiving, by the first node, a fourth signal from the second node, the fourth signal received at a fourth frequency that is different from the second frequency by the frequency difference, the fourth signal received during the second time window and having a measurable fourth phase value; and based on the first phase value, the second phase value, the third phase value, and the fourth phase value and the frequency difference, determining the distance between the first node and the second node.