Signal transmission method and apparatus, reflector, and receiver
This application provides a signal transmission method and apparatus, a reflector, and a receiver. In one example method, a reflector receives W excitation signals, where W exciters may be configured to carry data and a reference signal that are reflected by the reflector; and the reflector reflects data and L reference signals to a receiver, where the L reference signals are respectively carried in L excitation signals in the W excitation signals, where W and L are both integers greater than or equal to 1, and L is less than or equal to W.
1. A signal transmission method, comprising:
receiving, by a reflector, W excitation signals; and
reflecting, by the reflector, data and L reference signals to a receiver, wherein the L reference signals are respectively carried in L excitation signals in the W excitation signals, wherein
W and L are both integers greater than or equal to 1, and L is less than or equal to W, and wherein the L reference signals are carried in L time domain units, and each of the L time domain units carries one reference signal, and two reference signal symbols carried in two adjacent time domain units are opposite.
2. The method according to claim 1 , wherein the W excitation signals comprise T excitation signals, and the T excitation signals do not carry at least one of the reference signal or the data, wherein T is an integer greater than 0.
3. The method according to claim 2 , wherein T and L meet one of the following:
T is greater than L, T is equal to L, or T is less than L; and wherein
when T is equal to L, locations of the reference signals and the excitation signals in the T excitation signals in a time domain resource alternately appear.
4. The method according to claim 2 , wherein locations of the T excitation signals in a time domain resource are before locations of the L excitation signals in the time domain resource; or locations of the T excitation signals in a time domain resource are after locations of the L excitation signals in the time domain resource; and
wherein an interval between the locations of the T excitation signals in the time domain resource is less than an interval between the locations of the L excitation signals in the time domain resource; or an interval between the locations of the T excitation signals in the time domain resource is greater than an interval between the locations of the L excitation signals in the time domain resource.
5. The method according to claim 1 , wherein before the reflecting, by the reflector, data and L reference signals to a receiver, the method further comprises:
receiving, by the reflector, configuration information, wherein the configuration information comprises one or more of the following information:
a format of the reference signal, a location of the reference signal in a time domain resource, a quantity L of the reference signals, a location of an excitation signal that does not carry at least one of the reference signal or the data in the time domain resource, a quantity of excitation signals that do not carry at least one of the reference signal or the data, a location of an excitation signal that carries the reference signal in the time domain resource, a quantity of excitation signals that carry the reference signal, or a demodulation scheme of the data.
6. An apparatus, comprising:
one or more processors; and
a memory coupled to the one or more processors, wherein the memory stores instructions to be executed by the one or more processors, and wherein the instructions, when executed by the one or more processors, instructs the one or more processors to perform operations comprising:
receiving W excitation signals; and
reflecting data and L reference signals to a receiver, wherein the L reference signals are respectively carried in L excitation signals in the W excitation signals, wherein
W and L are both integers greater than or equal to 1, and L is less than or equal to W, wherein the W excitation signals comprise T excitation signals, and the T excitation signals do not carry the reference signal and the T excitation signals do not carry the data, wherein T is an integer greater than 0.
7. The apparatus according to claim 6 , wherein T and L meet one of the following:
T is greater than L, T is equal to L, or T is less than L; and
wherein when T is equal to L, locations of the reference signals and the excitation signals in the T excitation signals in a time domain resource alternately appear.
8. The apparatus according to claim 6 , wherein locations of the T excitation signals in a time domain resource are before locations of the L excitation signals in the time domain resource, or locations of the T excitation signals in a time domain resource are after locations of the L excitation signals in the time domain resource; and
wherein an interval between the locations of the T excitation signals in the time domain resource is less than an interval between the locations of the L excitation signals in the time domain resource, or an interval between the locations of the T excitation signals in the time domain resource is greater than an interval between the locations of the L excitation signals in the time domain resource.
9. The apparatus according to claim 6 , wherein the L reference signals are carried in L time domain units, and each of the L time domain units carries one reference signal; and
two reference signal symbols carried in two adjacent time domain units are opposite.
10. The apparatus according to claim 6 , wherein the operations comprise:
receiving configuration information, wherein the configuration information comprises one or more of the following information:
a format of the reference signal, a location of the reference signal in a time domain resource, a quantity L of the reference signals, a location of an excitation signal that does not carry at least one of the reference signal or the data in the time domain resource, a quantity of excitation signals that do not carry at least one of the reference signal or the data, a location of an excitation signal that carries the reference signal in the time domain resource, a quantity of excitation signals that carry the reference signal, or a demodulation scheme of the data.
11. A signal transmission method, comprising:
receiving, by a receiver, a plurality of signals, wherein each signal comprises data and L reference signals, and the L reference signals are carried in L excitation signals, wherein the plurality of signals comprise a first signal and a second signal, and time domain units carrying the first signal and the second signal are adjacent; and
demodulating, by the receiver, the plurality of signals, and wherein the demodulating, by the receiver, the plurality of signals comprises: performing, by the receiver, subtraction processing on the first signal and the second signal.