Technique for radio transmission under varying channel conditions

Patent metadata

Field	Value
Publication number	US-10924207-B2
Application number	US-201815781372-A
Country	US
Kind code	B2
Filing date	Apr 4, 2018
Priority date	Apr 4, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A technique for radio transmitting data is described. As to a method aspect of the technique data to be transmitted to a receiver is represented by at least two partial modulation symbols. Each of the at least two partial modulation symbols is associated to a different layer of the radio transmission to the receiver. A modulation symbol is generated by combining the at least two partial modulation symbols at different power levels according to the associated layer. The modulation symbol is transmitted to the receiver.

First claim

The invention claimed is:

1. A method of radio receiving data, the method comprising:
receiving a modulation symbol that is a combination of at least two partial modulation symbols at different power levels;
demodulating, based on the received modulation symbol, a partial modulation symbol and subtracting the demodulated partial modulation symbol from the received modulation symbol resulting in a residual modulation symbol;
repeating the demodulation based on the residual modulation symbol for demodulating-the at least two partial modulation symbols representing the data,
wherein the demodulation is repeated in the order of decreasing power levels until the demodulation or a decoding of the demodulated partial modulation symbol fails.

2. The method of claim 1 , wherein at least two of the partial modulation symbol correspond to the same modulation scheme applied at different power levels.

3. A method of radio receiving data, the method comprising:
receiving a modulation symbol that is a combination of at least two partial modulation symbols at different power levels;
demodulating, based on the received modulation symbol, a partial modulation symbol and subtracting the demodulated partial modulation symbol from the received modulation symbol resulting in a residual modulation symbol;
repeating the demodulation based on the residual modulation symbol for demodulating-the at least two partial modulation symbols representing the data, further comprising or initiating:
transmitting an acknowledgment feedback to a transmitter of the received modulation symbol, the acknowledgment feedback being indicative of a number of successfully decoded partial modulation symbols based on the received modulation symbol, the number being counted starting from the partial modulation symbol at the highest power level and in the order of decreasing power levels until the partial modulation symbol at the least power level among the successfully decoded partial modulation symbols.

4. A device for radio receiving data, the device comprising:
at least one processor; and
a memory coupled with said at least one processor, said memory comprising instructions executable by said at least one processor, whereby the device is operative to,
receive a modulation symbol that is a combination of at least two partial modulation symbols at different power levels,
demodulate, based on the received modulation symbol, a partial modulation symbol and subtracting the demodulated partial modulation symbol from the received modulation symbol resulting in a residual modulation symbol, and
repeat the demodulation based on the residual modulation symbol for demodulating the at least two partial modulation symbols representing the data,
wherein the demodulation is repeated in the order of decreasing power levels until the demodulation or a decoding of the demodulated partial modulation symbol fails.

5. The method of claim 1 , wherein the at least two partial modulation symbols or the at least two parts of the data represented by the respective at least two partial modulation symbols are non-redundant.

6. A non-transitory computer program product comprising program code configured to perform operations of claim 1 when the computer program product is executed on one or more computing devices, the computer program product being stored on a computer-readable recording medium.

7. The device of claim 4 , wherein at least two of the partial modulation symbols correspond to the same modulation scheme applied at different power levels.

8. A device for radio receiving data, the device comprising:
at least one processor; and
a memory coupled with said at least one processor, said memory comprising instructions executable by said at least one processor, whereby the device is operative to,
receive a modulation symbol that is a combination of at least two partial modulation symbols at different power levels,
demodulate, based on the received modulation symbol, a partial modulation symbol and subtracting the demodulated partial modulation symbol from the received modulation symbol resulting in a residual modulation symbol, and
repeat the demodulation based on the residual modulation symbol for demodulating the at least two partial modulation symbols representing, the data, further comprising or initiating:
transmitting an acknowledgment feedback to a transmitter of the received modulation symbol, the acknowledgment feedback being indicative of a number of successfully decoded partial modulation symbols based on the received modulation symbol, the number being counted starting from the partial modulation symbol at the highest power level and in the order of decreasing power levels until the partial modulation symbol at the least power level among the successfully decoded partial modulation symbols.

9. The device of claim 4 , wherein the at least two partial modulation symbols or the at least two parts of the data represented by the respective at least two partial modulation symbols are non-redundant.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Wilhelmsson Leif
• Di Taranto Rocco
• Lopez Miguel
• Smith Roland

Classifications

• H04W52/42

  in systems with time, space, frequency or polarisation diversity · CPC title

• H04L27/362

  Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated (H04L27/366 takes precedence) · CPC title

• H04L1/0033

  arrangements specific to the transmitter · CPC title

• H04L1/0026

  Transmission of channel quality indication · CPC title

• H04L1/0009 Primary

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title