Method for transmitting signals in communication networks, associated system and terminal
First Claim
1. A method for transmitting signals from a given point (BS) to a terminal (T) of a communication network, characterized in that it includes the steps of:
- selectively generating pulse signals starting from said terminal (T), detecting the waveforms received at said given point (BS) following the emission of said pulse signals, subjecting the waveforms thus detected to phase conjugation in such a way as to generate associated phase conjugated waveforms, and using said phase conjugated waveforms for transmission from said given point (BS) to said terminal (T).
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Accused Products
Abstract
A method for transmitting signals, and digital signals in particular, from a given point such as a base station (BS) to a terminal such as a mobile communications network terminal (T) envisages that said terminal (T) generates pulse signals at determined instants. The base station (BS) detects the received waveforms, which have been altered as a result of phenomena such as multipath propagation, for example. The waveforms thus detected are subjected to phase conjugation, e.g., in the form of time reversal. Transmission form the base station (BS) to the terminal (T) takes place using waveforms corresponding to the phase conjugated waveforms thus obtained. In this way, a waveform corresponding to that of the aforesaid pulse signals can be reconstituted at terminal (T). Reconstitution takes place only at the geographical position occupied by the terminal (T), without requiring the base station to track the terminal'"'"'s geographical location and without the need to divide geographical areas into cells in order to permit frequency reuse.
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Citations
16 Claims
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1. A method for transmitting signals from a given point (BS) to a terminal (T) of a communication network, characterized in that it includes the steps of:
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selectively generating pulse signals starting from said terminal (T), detecting the waveforms received at said given point (BS) following the emission of said pulse signals, subjecting the waveforms thus detected to phase conjugation in such a way as to generate associated phase conjugated waveforms, and using said phase conjugated waveforms for transmission from said given point (BS) to said terminal (T). - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A system for transmitting signals from a given point (BS) to a terminal (T) in a communications network, in which said terminal (T) is capable of generating pulse signals, characterized in that it includes:
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A receiver (12) for receiving said pulse signals at said given point (BS), An analysis unit (22) for detecting the waveforms received by said receiver (12) following the emission of said pulse signals by said terminal (T), A conjugation unit (24) which subjects the waveforms detected by said receiver (12) to phase conjugation in such a way as to generate the associated phase conjugated waveforms, and A transmission chain (16, 18) for transmitting from said given point (BS) to said terminal (T), said transmission chain (16, 18) being configured to use said phase conjugated waveforms for transmission. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16)
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Specification