Patent ID: 6307506
Filing Date: 2001-10-23
Classification: H01Q

Abstract:
A method for enhancing the transmission of information in a particular direction or the reception of information from a particular direction by an array of transducers, a transducer being any device for transforming radiated power into electrical power and vice versa, a transducer signal being associate with each transducer in the array, the plurality of transducer signals being the vehicle for transmitting or receiving information, each transducer signal being the sum of a first product and a second product, the first product being the product of a first signal and a cosine function of an argument, the second product being the product of a second signal and a sine function of the same argument, an argument being the sum of a phase and a product of an angular frequency and time, the bandwidths of the first and second signals being less than half a reference frequency W, th angular frequency of the sine and cosine functions being greater than 2.pi. times the reference frequency, the method comprising the following steps for each transducer signal in the array:(a) obtaining a first control parameter and adjusting the arguments of the sine and cosine functions by an amount governed by the first control parameter;(b) obtaining a second control parameter and adjusting an embedded time reference in the first and second signals with respect to a real-time reference by an amount governed by the second control parameter.