Method, apparatus, receiver, computer program and storage medium for joint detection

A joint detection method comprising:

• determining if a number of original active windows corresponding to a cell and intra-frequency adjacent cells exceeds a third threshold,
• if the number of the original active windows exceeds the third threshold and one or more strong interference windows exist among active windows corresponding to the intra-frequency adjacent cells, obtaining a number of first active windows of the original active windows excluding the one or more strong interference windows, wherein the number of the first active windows does not exceed the third threshold, and wherein a ratio of power of each of the one or more strong interference windows to a power of an active window of a user exceeds a fourth threshold;
• determining one or more strong interference codes corresponding to the one or more strong interference windows and first active codes corresponding to the first active windows;
• applying an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference codes;
• and
• performing a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.

A joint detection apparatus comprising:

• a branch selector circuit configured to determine if a number of original active codes corresponding to a cell and intra-frequency adjacent cells exceeds a first threshold;
• an obtaining circuit configured to obtain a number of first active codes of the original active codes excluding the one or more strong interference codes if the number of the original active codes exceeds the first threshold and one or more strong interference codes exist among active codes corresponding to the intra-frequency adjacent cells, wherein the number of the first active codes does not exceed the first threshold, and wherein a ratio of a power of each of the one or more strong interference codes to a power of an active code of a user exceeds a second threshold;
• an interference cancellation circuit configured to apply, corresponding to the one or more strong interference codes and based on the one or more strong interference codes, an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference codes;
• and
• a first joint detector circuit configured to perform a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.

A joint detection apparatus comprising:

• a branch selector circuit configured to determine if a number of original active windows corresponding to a cell and intra-frequency adjacent cells exceeds a third threshold;
• an obtaining circuit configured to obtain a number of first active windows of the original active windows excluding the one or more strong interference windows if the number of the original active windows exceeds the third threshold and one or more strong interference windows exist among active windows corresponding to the intra-frequency adjacent cells, wherein the number of the first active windows does not exceed the third threshold, and wherein a ratio of power of each of the one or more strong interference window to a power of an active window of a user exceeds a fourth threshold;
• a first determining circuit configured to determine a strong interference code corresponding to the strong interference window and first active codes corresponding to the first active windows;
• an interference cancellation circuit configured to apply an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference code;
• and
• a first joint detector circuit configured to perform a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.

A receiver comprising:

• a joint detection apparatus comprising:
• a branch selector circuit configured to determine if a number of original active codes corresponding to a cell and intra-frequency adjacent cells exceeds a first threshold;
• an obtaining circuit configured to obtain a number of first active codes of the original active codes excluding the one or more strong interference codes if the number of the original active codes exceeds the first threshold and one or more strong interference codes exist among active codes corresponding to the intra-frequency adjacent cells, wherein the number of the first active codes does not exceed the first threshold, and wherein a ratio of a power of each of the one or more strong interference codes to a power of an active code of a user exceeds a second threshold;
• an interference cancellation circuit configured to apply, corresponding to the one or more strong interference codes and based on the one or more strong interference codes, an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference codes;
• and
• a first joint detector circuit configured to perform a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.

A receiver comprising:

• a joint detection apparatus comprising:
• a branch selector circuit configured to determine if a number of original active windows corresponding to a cell and intra-frequency adjacent cells exceeds a third threshold;
• an obtaining circuit configured to obtain a number of first active windows of the original active windows excluding the one or more strong interference windows if the number of the original active windows exceeds the third threshold and one or more strong interference windows exist among active windows corresponding to the intra-frequency adjacent cells, wherein the number of the first active windows does not exceed the third threshold, and wherein a ratio of power of each of the one or more strong interference window to a power of an active window of a user exceeds a fourth threshold;
• a first determining circuit configured to determine a strong interference code corresponding to the strong interference window and first active codes corresponding to the first active windows;
• an interference cancellation circuit configured to apply an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference code;
• and
• a first joint detector circuit configured to perform a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.

A non-transitory computer program product comprising a computer readable medium having a computer program stored thereon, the computer program comprising program instructions loadable into a processor circuit of a joint detection apparatus, and configured to control the processor circuit to:

• determine if a number of original active codes corresponding to a cell and intra-frequency adjacent cells exceeds a first threshold;
• if the number of the original active codes is beyond the first threshold and one or more strong interference codes exist among active codes corresponding to the intra-frequency adjacent cells, obtain a number of first active codes of the original active codes excluding the one or more strong interference codes, wherein the number of the first active codes does not exceed the first threshold, and wherein a ratio of a power of each of the one or more strong interference codes to a power of an active code of a user exceeds a second threshold;
• apply, based on the one or more strong interference codes, an interference cancellation to a received signal to obtain a matched filtering result of a remaining signal excluding a strong interference signal corresponding to the one or more strong interference codes;
• and
• perform a joint detection by utilizing the first active codes and the matched filtering result of the remaining signal to obtain a first joint detection result.