Method of measuring receiver sensitivity, and transceiver
View Patent ↗A method of measuring sensitivity of the receiving end in a transceiver that includes a transmission path between the transmitting end and the receiving end and a switching mechanism for connecting a signal along the transmission path from the transmitting end of the transceiver to the receiving end. The transceiver also includes an attenuator for changing the level of the signal to be connected from the transmitting end to the receiving end and a mechanism for transmitting a test signal for determining properties of the transmission path, a mixer for transmitting the signal changed by the attenuator to the frequency band of the receiving end, a switching mechanism for connecting the signal transferred by the mixer through the receiving end, and a controller for comparing the signal transmitted from the transmitting end with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
1. A method of measuring sensitivity of the receiving end in a transceiver comprising:
connecting a signal along a signal path in the transceiver from the transmitting end of the transceiver to the receiving end of said transceiver,
adding a noise signal to the signal to be transmitted from the transmitting end to the receiving end to form a sum signal and taking into account the influence of transfer on the signal to be transmitted from the transmitting end to the receiving end,
transferring the sum signal entering the receiving end through the receiving end, and
comparing the signal sent from the transmitting end with the sum signal that has passed through the receiving end and determining sensitivity of the receiving end on the basis of the comparison.
2. A method according to claim 1 , further comprising determining the influence of signal path on the signals transmitted on the signal path by transmitting a test signal along the signal path.
3. A method according to claim 1 , further comprising determining the influence of signal path on the signals to be transmitted on the signal path by transmitting a test signal along the signal path and determining the properties of the signal path on the basis of the changes in the test signal during the transmission.
4. A method according to claim 1 , further comprising attenuating the level of the signal connected to the transmission path by using several attenuation coefficients and determining a sensitivity value corresponding to each attenuation coefficient for the receiving end.
5. A method according to claim 1 , further comprising changing the amount of noise to be added from time to time and determining a sensitivity value corresponding to each amount of noise for the receiving end.
6. A method according to claim 1 , further comprising determining sensitivity of the receiving end all the way from the receiving antenna by means of the method.
7. A method according to claim 1 , further comprising converting the signal transmitted from the transmitting end to the receiving end to the frequency band of the receiver.
8. A method according to claim 1 , further comprising determining sensitivity by comparing bits of the signal transmitted from the transmitting end with bits of the sum signal of the receiver at the receiving end.
9. A method according to claim 1 , wherein the signal to be connected to the transmission path in the method is in analogue form.
10. A method according to claim 1 , further comprising adapting the signal to be transmitted along the transmission path during the transmission, and taking into account the influence of transfer by determining changes caused in the signal by adaptation and transfer.
11. A method according to claim 1 , further comprising determining the attenuation caused in the signal by the transmission path and taking the attenuation into account when determining the receiver sensitivity.
12. A transceiver comprising a transmitting end and a receiving end,
a transmission path between the transmitting end and the receiving end,
a first switch configured to connect the signal along said transmission path from the transmitting end of the transceiver to the receiving end of the same transceiver,
a generator configured to generate noise in said signal,
a transmitter configured to transmit a test signal to the transmission path to determine properties of the transmission path,
a second switch configured to connect a signal to which noise has been added through the receiving end, and
a controller configured to compare the signal connected by the switch with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
13. A transceiver according to claim 12 , wherein the transceiver comprises a modulator configured to generate a modulated signal, and the signal connected by the switch is said modulated signal.
14. A transceiver according to claim 12 , further comprising an attenuator configured to attenuate the signal connected by the first switch.
15. A transceiver according to claim 12 , further comprising an attenuator configured to attenuate the signal connected by the first switch and a mixer configured to transmit the signal attenuated by the attenuator to the frequency band of the receiving end.
16. A transceiver according to claim 12 , further comprising a device configured to measure attenuation caused by the transmission path.
17. A transceiver according to claim 12 , further comprising a receiving antenna and a receiver, and wherein the transceiver is arranged to determine sensitivity of its receiving end from the receiving antenna up to the output of the receiver.
18. A transceiver according to claim 12 , wherein the receiving end of the transceiver comprises a receiver, and a controller configured to determine sensitivity by comparing bits of the signal transmitted from the transmitting end with bits of the output signal from the receiver, the output signal including noise.
19. A transceiver according to claim 12 , wherein the first switch is arranged to connect an analogue signal to the transmission path.
20. A base station comprising a transmitting end and a receiving end,
a transmission path between the transmitting end and the receiving end,
a first switch configured to connect the signal along said transmission path from the transmitting end of the transceiver to the receiving end of the same transceiver,
a generator configured to generate noise in said signal,
a transmitter configured to transmit a test signal to the transmission path to determine properties of the transmission path,
a second switch configured to connect a signal to which noise has been added through the receiving end, and
a controller configured to compare the signal connected by the switch with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
21. A radio system comprising a transceiver comprising a transmitting end and a receiving end,
a transmission path between the transmitting end and the receiving end,
a first switch configured to connect the signal along said transmission path from the transmitting end of the transceiver to the receiving end of the same transceiver,
a generator configured to generate noise in said signal,
a transmitter configured to transmit a test signal to the transmission path to determine properties of the transmission path,
a second switch configured to connect a signal to which noise has been added through the receiving end,
a controller configured to compare the signal connected by the switch with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
22. Equipment for measuring sensitivity of a receiving end in a transceiver comprising:
means for connecting a signal along a signal path in the transceiver from the transmitting end of the transceiver to the receiving end of said transceiver,
means for adding a noise signal to the signal to be transmitted from the transmitting end to the receiving end to form a sum signal and taking into account the influence of transfer on the signal to be transmitted from the transmitting end to the receiving end,
means for transferring the sum signal entering the receiving end through the receiving end, and
means for comparing the signal sent from the transmitting end with the sum signal that has passed through the receiving end and determining sensitivity of the receiving end on the basis of the comparison.
23. A transceiver comprising a transmitting end and a receiving end,
a first switching means for connecting the signal along a transmission path from a transmitting end of the transceiver to a receiving end of the same transceiver,
a generating means for generating noise in said signal,
a transmitting means for transmitting a test signal to the transmission path to determine properties of the transmission path,
a second switching means for connecting a signal to which noise has been added through the receiving end, and
a controlling means for comparing the signal connected by the first switching means with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
24. A base station comprising:
a transmitting end and a receiving end,
a transmission path between the transmitting end and the receiving end,
a first switching means for connecting the signal along said transmission path from the transmitting end of the transceiver to the receiving end of the same transceiver,
a generation means for generating noise in said signal,
a transmission means for transmitting a test signal to the transmission path to determine properties of the transmission path,
a second switching means for connecting a signal to which noise has been added through the receiving end, and
a controlling means for comparing the signal connected by the switch with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
25. A radio system comprising:
a transceiver comprising a transmitting end and a receiving end,
a transmission path between the transmitting end and the receiving end,
a first switching means for connecting the signal along said transmission path from the transmitting end of the transceiver to the receiving end of the same transceiver,
a generating means for generating noise in said signal,
a transmitting means for transmitting a test signal to the transmission path to determine properties of the transmission path,
a second switching means for connecting a signal to which noise has been added through the receiving end,
a controlling means for comparing the signal connected by the first switching means with the signal that has passed through the receiving end to determine sensitivity of the receiving end.
26. Equipment comprising:
a first switch configured to connect a signal along a signal path from the transmitting end of the transceiver to the receiving end of said transceiver,
a generator configured to generate noise,
an adder configured to form a sum signal of noise and the signal to be transmitted,
a second switch configured to connect the sum signal through the receiving end, and
a controller configured to compare the signal to be transmitted with the sum signal that has passed through the receiving end and to determine sensitivity of the receiving end on the basis of the comparison.