Patent ID: 8416837

Claim:
A signal modulation method is characterized in that the method includes the following steps: an input signal is channel encoded, and the channel encoded signal is processed by the following one or several ways: channel scrambling, interleaving, duplicating and puncturing; the signal being processed is divided into two components I and Q, wherein the two components I and Q compose a signal pair; the signal pair is divided into more than one path, and each respective path of signal is quadrature phase shift keying spectrum spreading modulated using a different spectrum spreading sequence and is orthogonally modulated in order that a peak-to-average power ratio of the respective path of signal being orthogonally modulated is obtained; and a path of signal having the smallest peak-to-average power ratio is selected to be outputted as an output signal, wherein the spectrum spreading sequence is generated by the following formula: h(D)=D 17 +D 14 +1.