Electronic device, method and apparatus for wireless communication system for channel estimation
An electronic device and method for wireless communication system, and a storage medium. In the method, reference signal are carried merely on a part of communication sources for channel estimation, channel states on the communication resources carrying the reference signal are estimated, and conditions of channel paths from a transmitter to a receiver are estimated by using the estimated channel states of the communication resources. Thereby, channel states on other communication resources from the transmitter to the receiver can be obtained from the estimated channel path conditions.
1. An electronic device for a receiver side in a wireless communication system, comprising:
a processing circuitry configured to:
estimate, based on reference signals from a transmitter of the wireless communication system, channel states on communication resources carrying the reference signals, wherein the reference signals are distributed over communication resources in a first frequency domain range of the communication system, and
estimate channel states on communication resources of a second frequency domain range from the transmitter to the receiver, using the estimated channel states on the communication resources of the first frequency domain range,
wherein the second frequency domain range is at least partially different from the first frequency domain range,
the reference signals are carried on a part of subcarriers of a scheduled downlink data resource block, and downlink data is carried on other subcarriers, and
the processing circuitry is configured to:
receive downlink data signal on a specified downlink data resource block and estimate channel states of the part of subcarriers based on the reference signals,
restore downlink channel states of the other subcarriers on the specified downlink data resource block,
use the downlink channel states of all subcarriers on the downlink data resource block to demodulate data on the downlink data resource block, and
perform Hybrid Automatic Retransmission Request (HARQ) based on data demodulation status.
2. The electronic device of claim 1 ,
wherein the reference signal is a demodulation reference signal (DMRS), and
wherein the DMRS is carried on the part of subcarriers of the scheduled downlink data resource block, and downlink data is carried on the other subcarriers.
3. The electronic device of claim 2 , wherein the processing circuit is configured to receive downlink data signal on the specified downlink data resource block, and
estimate channel states of the part of subcarriers based on the DMRS.
4. The electronic device of claim 1 , wherein the communication system is an OFDM-based communication system, and the communication resources correspond to the subcarriers,
wherein the number of subcarriers carrying the reference signals are determined based on accuracy of the channel estimation and a total bandwidth of the first frequency domain range which is expected to be occupied by the subcarriers containing the reference signals.
5. The electronic device of claim 1 , wherein channel states of subcarriers containing the reference signals are jointly estimated by using reference signals at least distributed over one time slot.
6. The electronic device of claim 1 , wherein the first frequency domain range is a low frequency domain range, and the second frequency domain range is a high frequency domain range.
7. A method for an electronic device for a receiver side in a wireless communication system comprising:
estimating, based on reference signals from a transmitter of the wireless communication system, channel states on communication resources carrying the reference signals, wherein the reference signals are distributed over communication resources in a first frequency domain range of the communication system, and
estimating channel states on communication resources of a second frequency domain range from the transmitter to the receiver, using the estimated channel states on the communication resources of the first frequency domain range,
wherein the second frequency domain range is at least partially different from the first frequency domain range,
the reference signals are carried on a part of subcarriers of a scheduled downlink data resource block, and downlink data is carried on other subcarriers, and
the method further comprising:
receiving downlink data signal on a specified downlink data resource block and estimate channel states of the part of subcarriers based on the reference signals,
restoring downlink channel states of the other subcarriers on the specified downlink data resource block,
using the downlink channel states of all subcarriers on the downlink data resource block to demodulate data on the downlink data resource block, and
performing Hybrid Automatic Retransmission Request (HARQ) based on data demodulation status.
8. The method of claim 7 ,
wherein the reference signal is a demodulation reference signal (DMRS), and
wherein the DMRS is carried on the part of subcarriers of the scheduled downlink data resource block, and downlink data is carried on the other subcarriers.
9. The method of claim 8 , further comprising:
receiving downlink data signal on the specified downlink data resource block, and
estimating channel states of the part of subcarriers based on the DMRS.
10. The method of claim 7 , wherein the communication system is an OFDM-based communication system, and the communication resources correspond to the subcarriers,
wherein the number of subcarriers carrying the reference signals are determined based on accuracy of the channel estimation and a total bandwidth of the first frequency domain range which is expected to be occupied by the subcarriers containing the reference signals.
11. The method of claim 7 , wherein channel states of subcarriers containing the reference signals are jointly estimated by using reference signals at least distributed over one time slot.
12. The method of claim 7 , wherein the first frequency domain range is a low frequency domain range, and the second frequency domain range is a high frequency domain range.
13. A non-transitory computer-readable storage medium including computer executable instructions, wherein the instructions, when executed by an electronic device for a receiver side in a wireless communication system, cause the electronic device to perform a method, the method comprising:
estimating, based on reference signals from a transmitter of the wireless communication system, channel states on communication resources carrying the reference signals, wherein the reference signals are distributed over communication resources in a first frequency domain range of the communication system, and
estimating channel states on communication resources of a second frequency domain range from the transmitter to the receiver, using the estimated channel states on the communication resources of the first frequency domain range,
wherein the second frequency domain range is at least partially different from the first frequency domain range,
the reference signals are carried on a part of subcarriers of a scheduled downlink data resource block, and downlink data is carried on other subcarriers, and
the method further comprising:
receiving downlink data signal on a specified downlink data resource block and estimate channel states of the part of subcarriers based on the reference signals,
restoring downlink channel states of the other subcarriers on the specified downlink data resource block,
using the downlink channel states of all subcarriers on the downlink data resource block to demodulate data on the downlink data resource block, and
performing Hybrid Automatic Retransmission Request (HARQ) based on data demodulation status.