Method, Apparatus, Receiver, Computer Program and Storage Medium for Joint Detection

A method for joint detection in a Direct Sequence-Code Division Multiple Access (DS-CDMA) system, the method comprising:

• acquiring a power of each of a number of codes in a matched filtering result of a received signal;
• adjusting a ranking order of the codes in the matched filtering result and a ranking order of column vectors in a system submatrix based on the power of the codes to obtain an adjusted matched filtering result and an adjusted system submatrix;
• and
• performing joint detection using the adjusted matched filtering result and the adjusted system submatrix to acquire demodulated signals corresponding to the codes,
• wherein, when performing the joint detection using the adjusted matched filtering result and the adjusted system submatrix, a first code is demodulated prior to a second code, and the power of the first code is greater than the power of the second code.

An apparatus for joint detection in a Direct Sequence-Code Division Multiple Access (DS-CDMA) system, comprising:

• a processor circuit configured to:
• acquire a power of each of a number of codes in a matched filtering result of a received signal;
• adjust a ranking order of the codes in the matched filtering result and a ranking order of column vectors in a system submatrix based on the power of the codes, to obtain an adjusted matched filtering result and an adjusted system submatrix;
• and
• perform joint detection using the adjusted matched filtering result and the adjusted system submatrix, to acquire demodulated signals corresponding to the codes,
• wherein, when the processor circuit performs the joint detection using the adjusted matched filtering result and the adjusted system submatrix, a first code is demodulated prior to a second code, and the power of the first code is greater than the power of the second code.

A receiver used in a Direct Sequence-Code Division Multiple Access (DS-CDMA) system, which comprises a joint detection apparatus comprising:

• a processor circuit configured to:
• acquire a power of each of a number of codes in a matched filtering result of a received signal;
• adjust a ranking order of the codes in the matched filtering result and a ranking order of column vectors in a system submatrix based on the power of the codes, to obtain an adjusted matched filtering result and an adjusted system submatrix;
• and
• perform joint detection using the adjusted matched filtering result and the adjusted system submatrix, to acquire demodulated signals corresponding to the codes,
• wherein, when the processing circuit performs the joint detection using the adjusted matched filtering result and the adjusted system submatrix, a first code is demodulated prior to a second code, and the power of the first code is greater than the power of the second code.

A computer program product comprising a computer-readable medium having program codes stored thereon that, when executed by a processor circuit in a Direct Sequence-Code Division Multiple Access (DS-CDMA) system, configures the processor circuit to:

• acquire a power of each of a number of codes in a matched filtering result of a received signal;
• adjust a ranking order of the codes in the matched filtering result and a ranking order of column vectors in a system submatrix based on the power of the codes to obtain an adjusted matched filtering result and an adjusted system submatrix;
• and
• perform joint detection using the adjusted matched filtering result and the adjusted system submatrix to acquire demodulated signals corresponding to the codes,
• wherein, when performing the joint detection using the adjusted matched filtering result and the adjusted system submatrix, a first code is demodulated prior to a second code, and the power of the first code is greater than the power of the second code.

A computer-readable medium comprising computer program instructions stored thereon that, when executed by a processor circuit, configures the processor circuit to:

• acquire a power of each of a number of codes in a matched filtering result of a received signal;
• adjust a ranking order of the codes in the matched filtering result and a ranking order of column vectors in a system submatrix based on the power of the codes to obtain an adjusted matched filtering result and an adjusted system submatrix;
• and
• perform joint detection using the adjusted matched filtering result and the adjusted system submatrix to acquire demodulated signals corresponding to the codes,
• wherein, when performing the joint detection using the adjusted matched filtering result and the adjusted system submatrix, a first code is demodulated prior to a second code, and the power of the first code is greater than the power of the second code.