Signal transmission method and apparatus

A signal transmission method, comprising:

• acquiring, by a user equipment, a compensation parameter value of a demodulation reference signal resource element (DMRS RE), user data, and a demodulation reference signal (DMRS), wherein the DMRS RE is used to carry the DMRS;
• wherein the compensation parameter value of the DMRS RE is searched from a preset compensation parameter value element set, wherein the compensation parameter value element set is obtained after design by compensation parameter value quantization, wherein the compensation parameter value of the DMRS RE includes a subscript of the compensation value element;
• computing, by the user equipment according to the compensation parameter value and a preset initial parameter value, the DMRS transmitted by a base station using a second parameter value, wherein the second parameter value is a parameter value that is required for transmitting the DMRS and determined by the base station according to an initial parameter value of the DMRS RE and the compensation parameter value;
• obtaining, by the user equipment, a DMRS RE channel estimation value according to the received DMRS and the computed DMRS transmitted by the base station using the second parameter value;
• performing, by the user equipment, interpolation filtering on the DMRS RE channel estimation value to obtain channel information of a user data resource element (RE), wherein the user data RE is used to carry the user data;
• and
• demodulating, by the user equipment, the user data according to the channel information of the user data RE.

A signal transmission method, comprising:

• determining, by a base station, a first parameter value of a user data resource element (RE), an initial parameter value of a demodulation reference signal resource element (DMRS RE), and a compensation parameter value of the DMRS RE, wherein the user data RE is used to carry user data, the first parameter value is used to indicate that a user equipment transmits the user data using the first parameter value, and the DMRS RE is used to carry a demodulation reference signal (DMRS);
• wherein the compensation parameter value of the DMRS RE is searched from a preset compensation parameter value element set, wherein the compensation parameter value element set is obtained after design by means of compensation parameter value quantization, wherein the compensation parameter value of the DMRS RE includes a subscript of the compensation value element;
• transmitting, by the base station, the compensation parameter value of the DMRS RE to the user equipment, so that the user equipment determines, according to the compensation parameter value and a preset initial parameter value, a second parameter value required for transmitting the DMRS;
• receiving, by the base station, the user data and the DMRS transmitted by the user equipment;
• computing, by the base station according to the compensation parameter value and the initial parameter value, the DMRS transmitted by the user equipment using the second parameter value;
• obtaining, by the base station, a DMRS RE channel estimation value according to the received DMRS and the computed DMRS transmitted by the user equipment using the second parameter value;
• performing, by the base station, interpolation filtering on the DMRS RE channel estimation value to obtain channel information of the user data RE;
• and
• demodulating, by the base station, the user data according to the channel information of the user data RE.

A signal transmission method, comprising:

• acquiring, by a user equipment, a compensation parameter value of a demodulation reference signal resource element (DMRS RE), wherein the DMRS RE is used to carry a demodulation reference signal (DMRS);
• wherein the compensation parameter value of the DMRS RE is searched from a preset compensation parameter value element set, wherein the compensation parameter value element set is obtained after design by means of compensation parameter value quantization, wherein the compensation parameter value of the DMRS RE includes a subscript of the compensation value element;
• determining, by the user equipment according to the compensation parameter value and a preset initial parameter value, a second parameter value required for transmitting the DMRS;
• and
• transmitting, by the user equipment, user data and the DMRS to a base station, so that the base station obtains a DMRS RE channel estimation value according to the received DMRS and the DMRS that is transmitted by the user equipment using the second parameter value and computed by the base station according to the compensation parameter value and an initial parameter value of the DMRS RE, and the base station performs interpolation filtering on the DMRS RE channel estimation value to obtain channel information of a user data resource element (RE), and further the base station demodulates the user data according to the channel information of the user data RE.

A base station, comprising:

• a processor, configured to determine a first parameter value of a user data resource element (RE), an initial parameter value of a demodulation reference signal resource element (DMRS RE), and a compensation parameter value of the DMRS RE, and determine, according to the initial parameter value and the compensation parameter value, a second parameter value required for transmitting a demodulation reference signal (DMRS), wherein the user data RE is used to carry user data, the first parameter value is used to indicate that the base station transmits the user data using the first parameter value, and the DMRS RE is used to carry the DMRS;
• wherein the compensation parameter value of the DMRS RE is searched from a preset compensation parameter value element set, wherein the compensation parameter value element set is obtained after design by means of compensation parameter value quantization, wherein the compensation parameter value of the DMRS RE includes a subscript of the compensation value element;
• and
• a transmitter, configured to transmit the DMRS, the user data, and the compensation parameter value to a user equipment, so that the user equipment computes, according to the compensation parameter value and a preset initial parameter value, the DMRS transmitted by the base station using the second parameter value, and that the user equipment obtains a DMRS RE channel estimation value according to the received DMRS and the computed DMRS transmitted by the base station using the second parameter value, and the user equipment performs interpolation filtering on the DMRS RE channel estimation value to obtain channel information of the user data RE, and further the user equipment demodulates the user data according to the channel information of the user data RE.

A user equipment, comprising:

• a processor, configured to acquire a compensation parameter value of a demodulation reference signal resource element (DMRS RE), wherein the DMRS RE is used to carry a demodulation reference signal (DMRS);
• and determine, according to the compensation parameter value and a preset initial parameter value, a second parameter value required for transmitting the DMRS;
• wherein the compensation parameter value of the DMRS RE is searched from a preset compensation parameter value element set, wherein the compensation parameter value element set is obtained after design by means of compensation parameter value quantization, wherein the compensation parameter value of the DMRS RE includes a subscript of the compensation value element;
• and
• a transmitter, configured to transmit user data and the DMRS to a base station, so that the base station obtains a DMRS RE channel estimation value according to the received DMRS and the DMRS that is transmitted by the user equipment using the second parameter value and computed by the base station according to the compensation parameter value and an initial parameter value of the DMRS RE, and the base station performs interpolation filtering on the DMRS RE channel estimation value to obtain channel information of a user data resource element (RE), and further the base station demodulates the user data according to the channel information of the user data RE.