Devices and methods for flexible channel measurement using splicing
A wireless transmitter is configured to generate a first pilot signal having a first signal strength profile over a first plurality of frequency sub-bands and a second pilot signal having a second signal strength profile over a second plurality of frequency sub-bands and to transmit the first pilot signal and the second pilot signal via the communication channel to the wireless receiver. The first plurality of frequency sub-bands and the second plurality of frequency sub-bands comprise at least three common frequency sub-bands, wherein the common frequency sub-bands comprise at least one central common frequency sub-band and two boundary common frequency sub-bands, wherein a respective signal strength of the at least one central common frequency sub-band is smaller than a respective signal strength of the two boundary common frequency sub-bands.
1 . A wireless transmitter, comprising:
at least one processor, configured to generate a first pilot signal having a first signal strength profile over a first plurality of adjacent frequency sub-bands and a second pilot signal having a second signal strength profile over a second plurality of adjacent frequency sub-bands; and
a communication interface, configured to transmit the first pilot signal and the second pilot signal via a communication channel to a wireless receiver,
wherein the first plurality of adjacent frequency sub-bands comprises a first exclusive frequency sub-band that is not comprised in the second plurality of adjacent frequency sub-bands,
wherein the second plurality of adjacent frequency sub-bands comprises a second exclusive frequency sub-band that is not comprised in the first plurality of adjacent frequency sub-bands,
wherein the first plurality of adjacent frequency sub-bands and the second plurality of adjacent frequency sub-bands comprise at least three common frequency sub-bands,
wherein the at least three common frequency sub-bands comprise at least one central common frequency sub-band and two boundary common frequency sub-bands, a first boundary common frequency sub-band of the two boundary common frequency sub-bands is at a lower frequency side of and adjacent to the central common frequency sub-band, and a second boundary common frequency sub-band of the two boundary common frequency sub-bands is at a higher frequency side of and adjacent to the central common frequency sub-band, and
wherein in each of the first signal strength profile and the second signal strength profile a respective signal strength of the at least one central common frequency sub-band is smaller than a respective signal strength of each of the two boundary common frequency sub-bands.
2 . The wireless transmitter of claim 1 , wherein in each of the first signal strength profile and the second signal strength profile a respective signal strength of the first exclusive frequency sub-band or the second exclusive frequency sub-band is larger than a respective signal strength of each of the at least three common frequency sub-bands.
3 . The wireless transmitter of claim 1 , wherein the communication interface is configured to transmit the first pilot signal and the second pilot signal simultaneously via the communication channel to the wireless receiver.
4 . The wireless transmitter of claim 1 , wherein the communication interface is configured to transmit the second pilot signal after the first pilot signal via the communication channel to the wireless receiver.
5 . The wireless transmitter of claim 1 , wherein a respective signal strength of the first pilot signal and a respective signal strength of the second pilot signal is constant within each of the at least three common frequency sub-bands.
6 . The wireless transmitter of claim 1 , wherein the first pilot signal comprises a first signal phase profile over the first plurality of adjacent frequency sub-bands and the second pilot signal comprises a second signal phase profile over the second plurality of adjacent frequency sub-bands.
7 . The wireless transmitter of claim 1 , wherein each of the at least three common frequency sub-bands comprises one or more subcarriers.
8 . The wireless transmitter of claim 1 , wherein the at least one processor is configured to generate the first pilot signal based on a first code sequence and the second pilot signal based on a second code sequence.
9 . The wireless transmitter of claim 8 , wherein at least one of the first code sequence or the second code sequence is pre-coded in a spatial domain or a frequency domain.
10 . The wireless transmitter of claim 8 , wherein the at least one processor is further configured to scramble at least one of the first code sequence or the second code sequence using a cryptographic key.
11 . The wireless transmitter of claim 1 , wherein the communication interface is further configured to send information about the first signal strength profile or the second signal strength profile to the wireless receiver.
12 . A method, comprising:
generating a first pilot signal having a first signal strength profile over a first plurality of adjacent frequency sub-bands and a second pilot signal having a second signal strength profile over a second plurality of adjacent frequency sub-bands; and
transmitting the first pilot signal and the second pilot signal via a communication channel to a wireless receiver,
wherein the first plurality of adjacent frequency sub-bands comprises a first exclusive frequency sub-band that is not comprised in the second plurality of adjacent frequency sub-bands,
wherein the second plurality of adjacent frequency sub-bands comprises a second exclusive frequency sub-band that is not comprised in the first plurality of adjacent frequency sub-bands,
wherein the first plurality of adjacent frequency sub-bands and the second plurality of adjacent frequency sub-bands comprises at least three common frequency sub-bands,
wherein the at least three common frequency sub-bands comprise at least one central common frequency sub-band and two boundary common frequency sub-bands, a first boundary common frequency sub-band of the two boundary common frequency sub-bands is at a lower frequency side of and adjacent to the central common frequency sub-band, and a second boundary common frequency sub-band of the two boundary common frequency sub-bands is at a higher frequency side of and adjacent to the central common frequency sub-band, and
wherein in each of the first signal strength profile and the second signal strength profile a respective signal strength of the at least one central common frequency sub-band is smaller than a respective signal strength of each of the two boundary common frequency sub-bands.
13 . A wireless receiver, comprising:
a communication interface, configured to receive a first pilot signal and a second pilot signal via a communication channel from a wireless transmitter, wherein the first pilot signal has a first signal strength profile over a first plurality of adjacent frequency sub-bands and the second pilot signal has a second signal strength profile over a second plurality of adjacent frequency sub-bands,
wherein the first plurality of adjacent frequency sub-bands comprises a first exclusive frequency sub-band that is not comprised in the second plurality of adjacent frequency sub-bands,
wherein the second plurality of adjacent frequency sub-bands comprises a second exclusive frequency sub-band that is not comprised in the first plurality of adjacent frequency sub-bands,
wherein the first plurality of adjacent frequency sub-bands and the second plurality of adjacent frequency sub-bands comprise at least three common frequency sub-bands,
wherein the at least three common frequency sub-bands comprise at least one central common frequency sub-band and two boundary common frequency sub-bands, a first boundary common frequency sub-band of the two boundary common frequency sub-bands is at a lower frequency side of and adjacent to the central common frequency sub-band, and a second boundary common frequency sub-band of the two boundary common frequency sub-bands is at a higher frequency side of and adjacent to the central common frequency sub-band, and
wherein in each of the first signal strength profile and the second signal strength profile a respective signal strength of the at least one central common frequency sub-band is smaller than a respective signal strength of each of the two boundary common frequency sub-bands.
14 . The wireless receiver of claim 13 , wherein in each of the first signal strength profile and the second signal strength profile a respective signal strength of the first exclusive frequency sub-band or the second exclusive frequency sub-band is larger than a respective signal strength of each of the at least three common frequency sub-bands.
15 . The wireless receiver of claim 13 , wherein the communication interface is configured to receive the first pilot signal and the second pilot signal simultaneously via the communication channel from the wireless transmitter.
16 . The wireless receiver of claim 13 , wherein the communication interface is configured to receive the second pilot signal after the first pilot signal via the communication channel from the wireless transmitter.
17 . The wireless receiver of claim 13 , wherein a respective signal strength of the first pilot signal and a respective signal strength of the second pilot signal are constant within each of the at least three common frequency sub-bands.
18 . The wireless receiver of claim 13 , wherein the first pilot signal comprises a first signal phase profile over the first plurality of adjacent frequency sub-bands and the second pilot signal comprises a second signal phase profile over the second plurality of adjacent frequency sub-bands.
19 . The wireless receiver of claim 13 , wherein each of the at least three common frequency sub-bands comprises one or more subcarriers.
20 . The wireless receiver of claim 13 , wherein the first pilot signal is based on a first code sequence and the second pilot signal is based on a second code sequence.