Patent ID: 8626079

Claim:
A link adaptation method of a wireless communication system, comprising: amplifying a received analog signal of a forward channel by an amplification gain, and converting the amplified signal into a digital signal; calculating a digital signal strength of the digital signal; calculating a received signal strength of the received analog signal by removing the amplification gain from the digital signal strength of the digital signal; and controlling transmission parameters of a reverse channel according to the calculated received signal strength, wherein the controlling the transmission parameters comprises: determining a low noise amplifier (LNA) gain mode based on a current LNA gain mode and the amplification gain; measuring an error of the received analog signal to determine an error vector magnitude (EVM); selecting a transmission mode based on the EVM, the received signal strength of the received analog signal, and the determined LNA gain mode, wherein the selected transmission mode specifies values for the transmission parameters, and wherein the transmission parameters comprise a transmission speed, a modulation method, and a code rate; and controlling the transmission parameters of the reverse channel according to the selected transmission mode.