Patent ID: 7236543

Claim:
An 8PSK modulation method, comprising the steps of: storing all 8PSK modulation states in a table after performing shape filtering; compressing data of the modulation states stored in the table based on corresponding relationship of law of a trigonometric function and an electrical level diversity; inputting signals; generating look-up table addresses, which comprises the steps of: generating symbol addresses and coefficient addresses; and mapping the input signals into the symbol addresses and generating coefficient addresses, wherein when an insertion value rate of modulated baseband signals is R, and a bit width of data is w bits, the look-up table addresses comprise 4 bits of the symbol addresses and ceil (log 2 (5*R)) bits of the coefficient addresses, and a capacity of the table is 4*5*R*w bits; looking-up the table to generate modulated signals; and outputting in-phase I and quadrature Q signals of the modulated signals.