Patent ID: 7706250

Claim:
An apparatus including a signal analyzer for measuring signal compression levels of one or more individual orthogonal frequency division multiplexed (OFDM) signals among a plurality of OFDM signals within a composite signal, comprising: first signal detector means for detecting a composite data signal, received via a signal communication path and containing at least first and second OFDM signals, to provide a first detected data signal corresponding to an envelope of said composite data signal, wherein said composite data signal originates from a remote signal source having a plurality of signal transmission processes associated therewith and includes a plurality of data packets each of which includes a respective portion of a plurality of transmit data, and each said respective portion of said plurality of transmit data corresponds to a respective portion of a plurality of known data in relation to a respective one of said plurality of signal transmission processes and said signal communication path; signal processing means for processing said composite data signal and said plurality of known data in at least partial accordance with a plurality of processes at least substantially similar to said plurality of signal transmission processes to provide at least first and second reference signals corresponding to at least first and second portions of said plurality of known data, respectively; second signal detector means for detecting said at least first and second reference signals to provide at least first and second control signals, respectively; and signal analyzer means for analyzing, in response to said at least first and second control signals, said first detected data signal to provide at least first and second analysis signals indicative of at least first and second power characteristics of said at least first and second OFDM signals, respectively.