pskmod output is complex, I expect out = I*cos(2*pi*fc*t) - Qsin(2*pi*fc*t)
조회 수: 3 (최근 30일)
이전 댓글 표시
I am trying to understand what parts of I/Q modulation are being performed by the pskmod function. To me modulation includes taking the input data and processing it into an I stream and a Q stream. The I stream is then mulitplied by cos and the Q stream by sin. The two streams are then added together. Therefore the output is in the form of I*cos(2*pi*fc*t) - Qsin(2*pi*fc*t). But the pskmod is giving me a matrix with values of x + yi. Is the pskmod function not multiplying the I and Q streams by cos and sin? Is the pskmod function actually just creating I + Q values?
Regards,
Mark
댓글 수: 0
채택된 답변
Walter Roberson
2022년 7월 31일
IQData = Iwave+1i*Qwave;
Notice that 1i. That is inherent in how IQ is created: you have two independent real channels multiplexed together by making one an imaginary component.
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 QPSK에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!