Patent ID: 7346100

Claim:
A method of estimating an imbalance of a transmitter when transmitting each symbol as multiple vector components, said method comprising: sending first plural vector symbols from said transmitter; measuring a first power corresponding to said first plural vector symbols at a receiver; sending second plural vector symbols, different from said first plural vector symbols, from said transmitter; measuring a second power corresponding to said second plural vector symbols at said receiver; and estimating said imbalance based on said first power and said second power, wherein each of said first plural vector symbols and said second plural vector symbols comprises a corresponding pair of vectors containing a first vector and a second vector, said method further comprising: modulating a first carrier signal using said first vector to generate a first modulated signal; modulating a second carrier signal using said second vector to generate a second modulated signal; and combining said first modulated signal and said second modulated signal to generate an analog signal, wherein each of said first plural vector symbols and said second plural vector symbols are encoded in said analog signal, wherein said transmitter and said receiver are integrated into a single transceiver, wherein said imbalance comprises a phase imbalance, wherein each of a first pair of vectors forming one of said first plural vector symbols and said second plural vector symbols comprises a first value of same sign for vector components, and a second pair of vectors forming another one of said first plural vector symbols and said second plural vector symbols comprises said first value but with opposite sign, wherein said first power is measured in response to sending said first values of same sign, and said second power is measured in response to sending said first values with opposite sign, and wherein said phase imbalance is computed according to an equation (r 1 −1)/(r 1 +1), wherein r 1 equals said first power/said second power, wherein − and + respectively represent subtraction and addition mathematical operations, and wherein / represents a division operation.