Signal transmission method and apparatus

A signal transmission apparatus, comprising:

• a transmitter;
• and
• a processor;
• wherein the processor is configured to cause the transmitter to transmit four modulated signals on four subcarriers, wherein the four subcarriers are subcarriers on frequency domain resources of two channels, wherein the two channels include a first channel and a second channel, the four subcarriers include a first subcarrier, a second subcarrier, a third subcarrier, and a fourth subcarrier, wherein the four modulated signals include a first modulated signal x1, a second modulated signal x2, a third modulated signal x3, and a fourth modulated signal x4, and wherein transmitting the four modulated signals on four subcarriers comprises:
• transmitting the first modulated signal x1 on the first subcarrier, wherein the first subcarrier is a subcarrier of the first channel;
• transmitting the second modulated signal x2 on the second subcarrier, wherein the second subcarrier is a subcarrier of the second channel;
• transmitting the third modulated signal x3 on the third subcarrier, wherein the third subcarrier is a subcarrier of the first channel;
• and
• transmitting the fourth modulated signal x4 on the fourth subcarrier, wherein the fourth subcarrier is a subcarrier of the second channel;
• wherein the four modulated signals x1, x2, x3, x4 are based on a channel matrix Q, wherein the channel matrix Q is
• Q
• =
• 1
• 2
• ⁡
• [
• 1
• j
• 0
• 0
• 0
• 0
• 1
• j
• 0
• 0
• 1
• -
• j
• 1
• -
• j
• 0
• 0
• ]
• ,
• where j corresponds to an imaginary unit;
• wherein two-channel aggregation is used for BPSK, and wherein the four modulated signals x1, x2, x3, x4 are expressed as follows:
• [
• x
• 1
• x
• 2
• x
• 3
• x
• 4
• ]
• =
• 1
• 2
• ⁡
• [
• 1
• j
• 0
• 0
• 0
• 0
• 1
• j
• 0
• 0
• 1
• -
• j
• 1
• -
• j
• 0
• 0
• ]
• ︸
• Q
• ⁡
• [
• s
• 1
• s
• 2
• s
• 3
• s
• 4
• ]
• ,
• where s1, s2, s3 and s4 are BPSK modulated signals, and x1, x2, x3 and x4 are QPSK modulated signals.

A non-transitory computer-readable medium having processor-executable instructions stored thereon for signal transmission, wherein the processor-executable instructions, when executed, facilitate:

• transmitting four modulated signals on four subcarriers, wherein the four subcarriers are subcarriers on frequency domain resources of two channels, wherein the two channels include a first channel and a second channel, wherein the four subcarriers include a first subcarrier, a second subcarrier, a third subcarrier, and a fourth subcarrier, wherein the four modulated signals include a first modulated signal x1, a second modulated signal x2, a third modulated signal x3, and a fourth modulated signal x4, and wherein transmitting the four modulated signals on four subcarriers comprises:
• transmitting the first modulated signal x1 on the first subcarrier, wherein the first subcarrier is a subcarrier of the first channel;
• transmitting the second modulated signal x2 on the second subcarrier, wherein the second subcarrier is a subcarrier of the second channel;
• transmitting the third modulated signal x3 on the third subcarrier, wherein the third subcarrier is a subcarrier of the first channel;
• and
• transmitting the fourth modulated signal x4 on the fourth subcarrier, wherein the fourth subcarrier is a subcarrier of the second channel;
• wherein the four modulated signals x1, x2, x3, x4 are based on a channel matrix Q, wherein the channel matrix Q is
• Q
• =
• 1
• 2
• ⁡
• [
• 1
• j
• 0
• 0
• 0
• 0
• 1
• j
• 0
• 0
• 1
• -
• j
• 1
• -
• j
• 0
• 0
• ]
• ,
• where j corresponds to an imaginary unit;
• wherein two-channel aggregation is used for BPSK, and wherein the four modulated signals x1, x2, x3, x4 are expressed as follows:
• [
• x
• 1
• x
• 2
• x
• 3
• x
• 4
• ]
• =
• 1
• 2
• ⁡
• [
• 1
• j
• 0
• 0
• 0
• 0
• 1
• j
• 0
• 0
• 1
• -
• j
• 1
• -
• j
• 0
• 0
• ]
• ︸
• Q
• ⁡
• [
• s
• 1
• s
• 2
• s
• 3
• s
• 4
• ]
• ,
• where s1, s2, s3 and s4 are BPSK modulated signals, and x1, x2, x3 and x4 are QPSK modulated signals.