Patent ID: 6980831

Claim:
A wireless communication base station system comprising: a wireless key base station; an optical forward base station; and an optical transmitter which connects said wireless key base station and said optical forward base station to each other; wherein said wireless key base station comprises: a modulator which modulates an input signal; a first distributor which distributes an input signal received from said modulator to two output signals; a first electrical to optical converter which converts a first output signal of the two output signals of said first distributor to an optical signal; a distortion extracter which extracts a distortion component from a signal obtained by amplifying a second output signal of the two output signals of said first distributor; and a second electrical to optical converter which converts an output signal of said distortion extracter to an optical signal; wherein said optical forward base station comprises: a first optical to electrical converter which converts the optical signal transmitted from said first electrical to optical converter through said optical transmitter to an electrical signal; a second optical to electrical converter which converts the optical signal transmitted from said second electrical to optical converter through said optical transmitter to an electrical signal; and a distortion remover which generates an amplified signal from which said distortion component is removed by using the output electrical signal of said first optical to electrical converter and the output electrical signal of said second optical to electrical converter.