Method for identifying the beginning of a UWB pulse sequence
First Claim
1. A method for receiving data in a telecommunication system including at least one transmitter and one receiver, the transmitter being configured to transmit a signal formed by a pulse sequence including a number (Np) of pulses distributed over a number (Np) of time windows, each pulse being enclosed within a time chip having a position within a corresponding time window defined by a chip number, comprising:
- synchronizing, at the receiver, a received signal from the transmitter, the synchronizing including;
scanning at the receiver the time windows, each having a same predetermined width, until a beginning of the pulse sequence is detected within one of the time windows,subdividing only the one of the time windows in which the beginning of the pulse sequence is detected into a plurality of sub-windows, each having a same sub-window width,scanning only the sub-windows until the beginning of the pulse sequence is detected within one of the sub-windows, andidentifying the one of the sub-windows in which the beginning of the pulse sequence is detected as the beginning of the pulse sequence if the sub-window width in which the beginning of the pulse sequence is detected is smaller than a predetermined minimum width.
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Accused Products
Abstract
A method for transmitting data in the form of pulse sequences, including a signal synchronization step carried out by a receiver of dataframes DF, in the course of which at least one time window ΔT(0) is scanned in search of the beginning PSB of a pulse sequence. The time window is then subdivided into a predefined number of sub-windows ΔT(1). The sub-windows are then scanned during further signal detection steps until the beginning PSB of the pulse sequence has been detected within one of the sub-windows which will then be substituted for the previous time window AT(0), until the width of the resulting sub-windows becomes smaller than a predetermined minimum width.
11 Citations
17 Claims
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1. A method for receiving data in a telecommunication system including at least one transmitter and one receiver, the transmitter being configured to transmit a signal formed by a pulse sequence including a number (Np) of pulses distributed over a number (Np) of time windows, each pulse being enclosed within a time chip having a position within a corresponding time window defined by a chip number, comprising:
synchronizing, at the receiver, a received signal from the transmitter, the synchronizing including; scanning at the receiver the time windows, each having a same predetermined width, until a beginning of the pulse sequence is detected within one of the time windows, subdividing only the one of the time windows in which the beginning of the pulse sequence is detected into a plurality of sub-windows, each having a same sub-window width, scanning only the sub-windows until the beginning of the pulse sequence is detected within one of the sub-windows, and identifying the one of the sub-windows in which the beginning of the pulse sequence is detected as the beginning of the pulse sequence if the sub-window width in which the beginning of the pulse sequence is detected is smaller than a predetermined minimum width. - View Dependent Claims (2, 3, 4, 5, 6, 15)
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7. A telecommunication system including at least one transmitter and one receiver, the transmitter configured to transmit a signal formed by a pulse sequence including a number (Np) of pulses distributed over a number (Np) of time windows, each pulse being enclosed within a time chip having a position within a corresponding time window defined by a chip number, comprising:
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a synchronizer configured to receive a received signal from the transmitter and to identify a time window having a predetermined width, the synchronizer including; a signal detector configured to scan the time windows, each having the predetermined width, until a beginning of the pulse sequence is detected within one of the time windows, to subdivide only the one of the time windows in which the beginning of the pulse sequence is detected into a plurality of sub-windows each having a same sub-window width, and to scan only the sub-windows until the beginning of the pulse sequence is detected within one of the sub-windows, the signal detector further configured to identify the one of the sub-windows in which the beginning of the pulse sequence is detected as the beginning of the pulse sequence if the sub-window width is smaller than a predetermined minimum width. - View Dependent Claims (8, 9, 10, 11, 12, 16)
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13. A device configured to receive a received signal formed by a pulse sequence including a number (Np) of pulses distributed over a corresponding number (Np) of time windows, each pulse being enclosed within a time chip having a position within a corresponding time window defined by a chip number, comprising:
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a synchronizer configured to receive the received signal and to identify a time window having a predetermined width, the synchronizer including; a signal detector configured to scan the time windows, each having the predetermined width, until a beginning of the pulse sequence is detected within one of the time windows, to subdivide only the one of the time windows in which the beginning of the pulse sequence is detected into a plurality of sub-windows each having a same sub-window width, and to scan only the sub-windows until the beginning of the pulse sequence is detected within one of the sub-windows, the signal detector further configured to identify the one of the sub-windows in which the beginning of the pulse sequence is detected as the beginning of the pulse sequence if the sub-window width is smaller than a predetermined minimum width. - View Dependent Claims (14, 17)
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Specification