Patent ID: 7593459

Claim:
A wireless link simulator receiving a digital quadrature input from a transmit device under test (TXDUT) and generating a quadrature digital output to a receive device under test (RXDUT), the link simulator comprising: a transmit impairment processor coupled to the TXDUT and producing a transmit impairment processor output, said transmit impairment processor converting said digital quadrature input into an absolute value part and an angle part, the absolute value part coupled to a first multiplier which forms an output from said absolute value part multiplied by a first value derived from said absolute value part; an adder having an output, said adder combining said angle part with a second value derived from said absolute value part; a table generating a sine part and a cosine part for said adder output; an I multiplier and a Q multiplier, said I multiplier forming an I output from a product of said first multiplier output and said table sine part, said Q multiplier forming a Q output from a product of said first multiplier output and said table cosine part; a channel simulator coupled to said transmit impairment processor output and producing a channel simulator output; a receive impairment processor coupled to said channel simulator and producing as output said quadrature digital output coupled to said RXDUT; where said channel simulator includes at least one simulator multi-path channel.