Patent ID: 7917084

Claim:
In a cellular repeater system, a method for watermarking a cellular telephone signal, the method comprising: receiving an uplink signal from a handset; applying a first watermark identifier to the uplink signal by modulating the uplink signal in accordance with a first predetermined encoding scheme, wherein the first watermark identifier identifies effects introduced to the uplink signal by the cellular repeater system; transmitting the modulated uplink signal to a base station, wherein the base station accounts for the effects introduced by the cellular repeater system; receiving a downlink signal from the base station; modulating the downlink signal in accordance with a second predetermined encoding scheme for applying a second watermark identifier to the downlink signal wherein the first predetermined encoding scheme and the second predetermined encoding scheme are the same, and wherein the first watermark identifier and the second watermark identifier are the same; and transmitting the modulated downlink signal to the handset.